mirror of https://github.com/citusdata/citus.git
928 lines
36 KiB
Plaintext
928 lines
36 KiB
Plaintext
CREATE SCHEMA background_task_queue_monitor;
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SET search_path TO background_task_queue_monitor;
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SET citus.shard_count TO 4;
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SET citus.shard_replication_factor TO 1;
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SET citus.next_shard_id TO 3536400;
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SET client_min_messages TO ERROR;
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-- reset sequence values
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ALTER SEQUENCE pg_dist_background_job_job_id_seq RESTART 1450000;
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ALTER SEQUENCE pg_dist_background_task_task_id_seq RESTART 1450000;
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-- create helper procedure to wait until given task is retried or timeout occurs
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CREATE OR REPLACE PROCEDURE citus_wait_task_until_retried(taskid bigint)
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LANGUAGE plpgsql
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AS $$
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DECLARE
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retried boolean := false;
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loop_count int := 0;
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BEGIN
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WHILE retried = false and loop_count < 20
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LOOP
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SELECT (retry_count IS NOT NULL) INTO retried FROM pg_dist_background_task WHERE task_id = taskid;
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PERFORM pg_sleep(1);
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loop_count := loop_count + 1;
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COMMIT;
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END LOOP;
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-- timeout if the task is not retried in 20 sec
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IF retried = false
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THEN
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RAISE WARNING 'Timeout while waiting for retrying task:%', taskid;
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END IF;
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END;
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$$;
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--
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ALTER SYSTEM SET citus.background_task_queue_interval TO '1s';
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SELECT pg_reload_conf();
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pg_reload_conf
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---------------------------------------------------------------------
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t
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(1 row)
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CREATE TABLE results (a int);
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-- TEST1
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-- simple job that inserts 1 into results to show that query runs
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SELECT a FROM results WHERE a = 1; -- verify result is not in there
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a
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---------------------------------------------------------------------
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(0 rows)
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify background execution') RETURNING job_id \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id, $job$ INSERT INTO background_task_queue_monitor.results VALUES ( 1 ); $job$) RETURNING task_id \gset
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SELECT citus_job_wait(:job_id); -- wait for the job to be finished
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT a FROM results WHERE a = 1; -- verify result is there
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a
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---------------------------------------------------------------------
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1
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(1 row)
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-- TEST2
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-- cancel a running job
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job','cancelling a task after it started') RETURNING job_id \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id \gset
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SELECT citus_job_wait(:job_id, desired_status => 'running');
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_cancel(:job_id);
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id);
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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-- show that the status has been cancelled
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SELECT state, NOT(started_at IS NULL) AS did_start FROM pg_dist_background_job WHERE job_id = :job_id;
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state | did_start
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---------------------------------------------------------------------
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cancelled | t
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(1 row)
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SELECT status, NOT(message = '') AS did_start FROM pg_dist_background_task WHERE job_id = :job_id ORDER BY task_id ASC;
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status | did_start
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---------------------------------------------------------------------
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cancelled | t
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(1 row)
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-- TEST3
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-- test a failing task becomes runnable in the future again
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-- we cannot fully test the backoff strategy currently as it is hard coded to take about 50 minutes.
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'failure test due to division by zero') RETURNING job_id \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id, $job$ SELECT 1/0; $job$) RETURNING task_id \gset
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SELECT citus_job_wait(:job_id, desired_status => 'running');
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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CALL citus_wait_task_until_retried(:task_id); -- shows that we increased retry count for task after failure
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SELECT status, pid, retry_count, NOT(message = '') AS has_message, (not_before > now()) AS scheduled_into_the_future FROM pg_dist_background_task WHERE job_id = :job_id ORDER BY task_id ASC;
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status | pid | retry_count | has_message | scheduled_into_the_future
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---------------------------------------------------------------------
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runnable | | 1 | t | t
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(1 row)
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-- test cancelling a failed/retrying job
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SELECT citus_job_cancel(:job_id);
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id);
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT state, NOT(started_at IS NULL) AS did_start FROM pg_dist_background_job WHERE job_id = :job_id;
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state | did_start
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---------------------------------------------------------------------
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cancelled | t
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(1 row)
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SELECT status, NOT(message = '') AS did_start FROM pg_dist_background_task WHERE job_id = :job_id ORDER BY task_id ASC;
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status | did_start
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---------------------------------------------------------------------
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cancelled | t
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(1 row)
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-- TEST4
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-- test running two dependent tasks
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TRUNCATE TABLE results;
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BEGIN;
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify background execution') RETURNING job_id \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id, $job$ INSERT INTO background_task_queue_monitor.results VALUES ( 5 ); $job$) RETURNING task_id AS task_id1 \gset
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INSERT INTO pg_dist_background_task (job_id, status, command) VALUES (:job_id, 'blocked', $job$ UPDATE background_task_queue_monitor.results SET a = a * 7; $job$) RETURNING task_id AS task_id2 \gset
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INSERT INTO pg_dist_background_task (job_id, status, command) VALUES (:job_id, 'blocked', $job$ UPDATE background_task_queue_monitor.results SET a = a + 13; $job$) RETURNING task_id AS task_id3 \gset
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INSERT INTO pg_dist_background_task_depend (job_id, task_id, depends_on) VALUES (:job_id, :task_id2, :task_id1);
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INSERT INTO pg_dist_background_task_depend (job_id, task_id, depends_on) VALUES (:job_id, :task_id3, :task_id2);
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COMMIT;
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SELECT citus_job_wait(:job_id); -- wait for the job to be finished
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT a FROM results;
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a
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---------------------------------------------------------------------
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48
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(1 row)
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-- TEST5
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-- test running two dependent tasks, with a failing task that we cancel
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TRUNCATE TABLE results;
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BEGIN;
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify background execution') RETURNING job_id \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id, $job$ INSERT INTO background_task_queue_monitor.results VALUES ( 5 ); $job$) RETURNING task_id AS task_id1 \gset
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INSERT INTO pg_dist_background_task (job_id, status, command) VALUES (:job_id, 'blocked', $job$ SELECT 1/0; $job$) RETURNING task_id AS task_id2 \gset
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INSERT INTO pg_dist_background_task (job_id, status, command) VALUES (:job_id, 'blocked', $job$ UPDATE background_task_queue_monitor.results SET a = a + 13; $job$) RETURNING task_id AS task_id3 \gset
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INSERT INTO pg_dist_background_task_depend (job_id, task_id, depends_on) VALUES (:job_id, :task_id2, :task_id1);
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INSERT INTO pg_dist_background_task_depend (job_id, task_id, depends_on) VALUES (:job_id, :task_id3, :task_id2);
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COMMIT;
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SELECT citus_job_wait(:job_id, desired_status => 'running'); -- wait for the job to be running, and possibly hitting a failure
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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CALL citus_wait_task_until_retried(:task_id2); -- shows that we increased retry count for task after failure
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SELECT citus_job_cancel(:job_id);
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id); -- wait for the job to be cancelled
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT state, NOT(started_at IS NULL) AS did_start FROM pg_dist_background_job WHERE job_id = :job_id;
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state | did_start
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---------------------------------------------------------------------
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cancelled | t
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(1 row)
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SELECT status, NOT(message = '') AS did_start FROM pg_dist_background_task WHERE job_id = :job_id ORDER BY task_id ASC;
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status | did_start
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---------------------------------------------------------------------
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done | t
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cancelled | t
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cancelled | f
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(3 rows)
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-- TEST6
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-- verify that we do not allow parallel task executors more than citus.max_background_task_executors(4 by default)
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BEGIN;
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify max parallel background execution') RETURNING job_id AS job_id1 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id1 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id2 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id3 \gset
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify max parallel background execution') RETURNING job_id AS job_id2 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id2, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id4 \gset
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify max parallel background execution') RETURNING job_id AS job_id3 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id3, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id5 \gset
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COMMIT;
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SELECT citus_task_wait(:task_id1, desired_status => 'running');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_task_wait(:task_id2, desired_status => 'running');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_task_wait(:task_id3, desired_status => 'running');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_task_wait(:task_id4, desired_status => 'running');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_task_wait(:task_id5, desired_status => 'runnable');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT job_id, task_id, status FROM pg_dist_background_task
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WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4, :task_id5)
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ORDER BY job_id, task_id; -- show that last task is not running but ready to run(runnable)
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job_id | task_id | status
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---------------------------------------------------------------------
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1450005 | 1450009 | running
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1450005 | 1450010 | running
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1450005 | 1450011 | running
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1450006 | 1450012 | running
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1450007 | 1450013 | runnable
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(5 rows)
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SELECT citus_job_cancel(:job_id2); -- when a job with 1 task is cancelled, the last runnable task will be running
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id2); -- wait for the job to be cancelled
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id3, desired_status => 'running');
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT job_id, task_id, status FROM pg_dist_background_task
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WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4, :task_id5)
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ORDER BY job_id, task_id; -- show that last task is running
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job_id | task_id | status
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---------------------------------------------------------------------
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1450005 | 1450009 | running
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1450005 | 1450010 | running
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1450005 | 1450011 | running
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1450006 | 1450012 | cancelled
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1450007 | 1450013 | running
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(5 rows)
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SELECT citus_job_cancel(:job_id1);
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_cancel(:job_id3);
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id1);
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id3);
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT job_id, task_id, status FROM pg_dist_background_task
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WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4, :task_id5)
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ORDER BY job_id, task_id; -- show that multiple cancels worked
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job_id | task_id | status
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---------------------------------------------------------------------
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1450005 | 1450009 | cancelled
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1450005 | 1450010 | cancelled
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1450005 | 1450011 | cancelled
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1450006 | 1450012 | cancelled
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1450007 | 1450013 | cancelled
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(5 rows)
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-- TEST7
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-- verify that a task, previously not started due to lack of workers, is executed after we increase max worker count
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BEGIN;
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify max parallel background execution') RETURNING job_id AS job_id1 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id1 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id2 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id3 \gset
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify max parallel background execution') RETURNING job_id AS job_id2 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id2, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id4 \gset
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify max parallel background execution') RETURNING job_id AS job_id3 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id3, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id5 \gset
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COMMIT;
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SELECT citus_task_wait(:task_id1, desired_status => 'running');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_task_wait(:task_id2, desired_status => 'running');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_task_wait(:task_id3, desired_status => 'running');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_task_wait(:task_id4, desired_status => 'running');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_task_wait(:task_id5, desired_status => 'runnable');
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citus_task_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT task_id, status FROM pg_dist_background_task
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WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4, :task_id5)
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ORDER BY task_id; -- show that last task is not running but ready to run(runnable)
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task_id | status
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---------------------------------------------------------------------
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1450014 | running
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1450015 | running
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1450016 | running
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1450017 | running
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1450018 | runnable
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(5 rows)
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ALTER SYSTEM SET citus.max_background_task_executors TO 5;
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SELECT pg_reload_conf(); -- the last runnable task will be running after change
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pg_reload_conf
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---------------------------------------------------------------------
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t
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(1 row)
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SELECT citus_job_wait(:job_id3, desired_status => 'running');
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT task_id, status FROM pg_dist_background_task
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WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4, :task_id5)
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ORDER BY task_id; -- show that last task is running
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task_id | status
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---------------------------------------------------------------------
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1450014 | running
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1450015 | running
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1450016 | running
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1450017 | running
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1450018 | running
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(5 rows)
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SELECT citus_job_cancel(:job_id1);
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_cancel(:job_id2);
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_cancel(:job_id3);
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citus_job_cancel
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id1);
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id2);
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT citus_job_wait(:job_id3);
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citus_job_wait
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---------------------------------------------------------------------
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(1 row)
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SELECT task_id, status FROM pg_dist_background_task
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WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4, :task_id5)
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ORDER BY task_id; -- show that all tasks are cancelled
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task_id | status
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---------------------------------------------------------------------
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1450014 | cancelled
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1450015 | cancelled
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1450016 | cancelled
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1450017 | cancelled
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1450018 | cancelled
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(5 rows)
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-- TEST8
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-- verify that upon termination signal, all tasks fail and retry policy sets their status back to runnable
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BEGIN;
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify termination on monitor') RETURNING job_id AS job_id1 \gset
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INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id1 \gset
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INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify termination on monitor') RETURNING job_id AS job_id2 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id2, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id2 \gset
|
|
COMMIT;
|
|
SELECT citus_job_wait(:job_id1, desired_status => 'running');
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id2, desired_status => 'running');
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT task_id, status FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2)
|
|
ORDER BY task_id;
|
|
task_id | status
|
|
---------------------------------------------------------------------
|
|
1450019 | running
|
|
1450020 | running
|
|
(2 rows)
|
|
|
|
SELECT pid AS monitor_pid FROM pg_stat_activity WHERE application_name ~ 'task queue monitor' \gset
|
|
SELECT pg_terminate_backend(:monitor_pid); -- terminate monitor process
|
|
pg_terminate_backend
|
|
---------------------------------------------------------------------
|
|
t
|
|
(1 row)
|
|
|
|
CALL citus_wait_task_until_retried(:task_id1); -- shows that we increased retry count for task after failure
|
|
CALL citus_wait_task_until_retried(:task_id2); -- shows that we increased retry count for task after failure
|
|
SELECT task_id, status, retry_count, message FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2)
|
|
ORDER BY task_id; -- show that all tasks are runnable by retry policy after termination signal
|
|
task_id | status | retry_count | message
|
|
---------------------------------------------------------------------
|
|
1450019 | runnable | 1 | FATAL: terminating background worker "Citus Background Task Queue Executor: regression/postgres for (xxxxx/xxxxx)" due to administrator command+
|
|
| | | CONTEXT: Citus Background Task Queue Executor: regression/postgres for (xxxxx/xxxxx) +
|
|
| | |
|
|
1450020 | runnable | 1 | FATAL: terminating background worker "Citus Background Task Queue Executor: regression/postgres for (xxxxx/xxxxx)" due to administrator command+
|
|
| | | CONTEXT: Citus Background Task Queue Executor: regression/postgres for (xxxxx/xxxxx) +
|
|
| | |
|
|
(2 rows)
|
|
|
|
SELECT citus_job_cancel(:job_id1);
|
|
citus_job_cancel
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_cancel(:job_id2);
|
|
citus_job_cancel
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id1);
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id2);
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT task_id, status FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2)
|
|
ORDER BY task_id; -- show that all tasks are cancelled
|
|
task_id | status
|
|
---------------------------------------------------------------------
|
|
1450019 | cancelled
|
|
1450020 | cancelled
|
|
(2 rows)
|
|
|
|
-- TEST9
|
|
-- verify that upon cancellation signal, all tasks are cancelled
|
|
BEGIN;
|
|
INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify cancellation on monitor') RETURNING job_id AS job_id1 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id1 \gset
|
|
INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify cancellation on monitor') RETURNING job_id AS job_id2 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id2, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id2 \gset
|
|
COMMIT;
|
|
SELECT citus_job_wait(:job_id1, desired_status => 'running');
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id2, desired_status => 'running');
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT task_id, status FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2)
|
|
ORDER BY task_id;
|
|
task_id | status
|
|
---------------------------------------------------------------------
|
|
1450021 | running
|
|
1450022 | running
|
|
(2 rows)
|
|
|
|
SELECT pid AS monitor_pid FROM pg_stat_activity WHERE application_name ~ 'task queue monitor' \gset
|
|
SELECT pg_cancel_backend(:monitor_pid); -- cancel monitor process
|
|
pg_cancel_backend
|
|
---------------------------------------------------------------------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id1, desired_status => 'cancelled'); -- shows that we cancelled the task
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id2, desired_status => 'cancelled'); -- shows that we cancelled the task
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id1);
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id2);
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT task_id, status FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2)
|
|
ORDER BY task_id; -- show that all tasks are cancelled
|
|
task_id | status
|
|
---------------------------------------------------------------------
|
|
1450021 | cancelled
|
|
1450022 | cancelled
|
|
(2 rows)
|
|
|
|
-- TEST10
|
|
-- verify that task is not starved by currently long running task
|
|
BEGIN;
|
|
INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify task execution starvation') RETURNING job_id AS job_id1 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id1, $job$ SELECT pg_sleep(5); $job$) RETURNING task_id AS task_id1 \gset
|
|
INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify task execution starvation') RETURNING job_id AS job_id2 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command) VALUES (:job_id2, $job$ SELECT 1; $job$) RETURNING task_id AS task_id2 \gset
|
|
COMMIT;
|
|
SELECT citus_job_wait(:job_id1, desired_status => 'running');
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id2, desired_status => 'finished');
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT job_id, task_id, status FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2)
|
|
ORDER BY job_id, task_id; -- show that last task is finished without starvation
|
|
job_id | task_id | status
|
|
---------------------------------------------------------------------
|
|
1450015 | 1450023 | running
|
|
1450016 | 1450024 | done
|
|
(2 rows)
|
|
|
|
SELECT citus_job_cancel(:job_id1);
|
|
citus_job_cancel
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id1);
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT job_id, task_id, status FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2)
|
|
ORDER BY job_id, task_id; -- show that task is cancelled
|
|
job_id | task_id | status
|
|
---------------------------------------------------------------------
|
|
1450015 | 1450023 | cancelled
|
|
1450016 | 1450024 | done
|
|
(2 rows)
|
|
|
|
-- TEST11
|
|
-- verify that we do not allow parallel task executors involving a particular node
|
|
-- more than citus.max_background_task_executors_per_node
|
|
-- verify that we can change citus.max_background_task_executors_per_node on the fly
|
|
-- tests are done with dummy node ids
|
|
-- citus_task_wait calls are used to ensure consistent pg_dist_background_task query
|
|
-- output i.e. to avoid flakiness
|
|
BEGIN;
|
|
INSERT INTO pg_dist_background_job (job_type, description) VALUES ('test_job', 'simple test to verify changing max background task executors per node on the fly') RETURNING job_id AS job_id1 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command, nodes_involved) VALUES (:job_id1, $job$ SELECT pg_sleep(2); $job$, ARRAY [1, 2]) RETURNING task_id AS task_id1 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command, nodes_involved) VALUES (:job_id1, $job$ SELECT pg_sleep(2); $job$, ARRAY [3, 4]) RETURNING task_id AS task_id2 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command, nodes_involved) VALUES (:job_id1, $job$ SELECT pg_sleep(4); $job$, ARRAY [1, 2]) RETURNING task_id AS task_id3 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command, nodes_involved) VALUES (:job_id1, $job$ SELECT pg_sleep(4); $job$, ARRAY [1, 3]) RETURNING task_id AS task_id4 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command, nodes_involved) VALUES (:job_id1, $job$ SELECT pg_sleep(4); $job$, ARRAY [2, 4]) RETURNING task_id AS task_id5 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command, nodes_involved) VALUES (:job_id1, $job$ SELECT pg_sleep(7); $job$, ARRAY [1, 2]) RETURNING task_id AS task_id6 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command, nodes_involved) VALUES (:job_id1, $job$ SELECT pg_sleep(6); $job$, ARRAY [1, 3]) RETURNING task_id AS task_id7 \gset
|
|
INSERT INTO pg_dist_background_task (job_id, command, nodes_involved) VALUES (:job_id1, $job$ SELECT pg_sleep(6); $job$, ARRAY [1, 4]) RETURNING task_id AS task_id8 \gset
|
|
COMMIT;
|
|
SELECT citus_task_wait(:task_id1, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id2, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT job_id, task_id, status, nodes_involved FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4,
|
|
:task_id5, :task_id6, :task_id7, :task_id8)
|
|
ORDER BY job_id, task_id; -- show that at most 1 task per node is running
|
|
job_id | task_id | status | nodes_involved
|
|
---------------------------------------------------------------------
|
|
1450017 | 1450025 | running | {1,2}
|
|
1450017 | 1450026 | running | {3,4}
|
|
1450017 | 1450027 | runnable | {1,2}
|
|
1450017 | 1450028 | runnable | {1,3}
|
|
1450017 | 1450029 | runnable | {2,4}
|
|
1450017 | 1450030 | runnable | {1,2}
|
|
1450017 | 1450031 | runnable | {1,3}
|
|
1450017 | 1450032 | runnable | {1,4}
|
|
(8 rows)
|
|
|
|
SELECT citus_task_wait(:task_id1, desired_status => 'done');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id2, desired_status => 'done');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
-- increase max_background_task_executors_per_node on the fly
|
|
ALTER SYSTEM SET citus.max_background_task_executors_per_node = 2;
|
|
SELECT pg_reload_conf();
|
|
pg_reload_conf
|
|
---------------------------------------------------------------------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id3, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id4, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id5, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT job_id, task_id, status, nodes_involved FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4,
|
|
:task_id5, :task_id6, :task_id7, :task_id8)
|
|
ORDER BY job_id, task_id; -- show that at most 2 tasks per node are running
|
|
job_id | task_id | status | nodes_involved
|
|
---------------------------------------------------------------------
|
|
1450017 | 1450025 | done | {1,2}
|
|
1450017 | 1450026 | done | {3,4}
|
|
1450017 | 1450027 | running | {1,2}
|
|
1450017 | 1450028 | running | {1,3}
|
|
1450017 | 1450029 | running | {2,4}
|
|
1450017 | 1450030 | runnable | {1,2}
|
|
1450017 | 1450031 | runnable | {1,3}
|
|
1450017 | 1450032 | runnable | {1,4}
|
|
(8 rows)
|
|
|
|
-- increase to 3 max_background_task_executors_per_node on the fly
|
|
SELECT citus_task_wait(:task_id3, desired_status => 'done');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id4, desired_status => 'done');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id5, desired_status => 'done');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
ALTER SYSTEM SET citus.max_background_task_executors_per_node = 3;
|
|
SELECT pg_reload_conf();
|
|
pg_reload_conf
|
|
---------------------------------------------------------------------
|
|
t
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id6, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id7, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id8, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT job_id, task_id, status, nodes_involved FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4,
|
|
:task_id5, :task_id6, :task_id7, :task_id8)
|
|
ORDER BY job_id, task_id; -- show that at most 3 tasks per node are running
|
|
job_id | task_id | status | nodes_involved
|
|
---------------------------------------------------------------------
|
|
1450017 | 1450025 | done | {1,2}
|
|
1450017 | 1450026 | done | {3,4}
|
|
1450017 | 1450027 | done | {1,2}
|
|
1450017 | 1450028 | done | {1,3}
|
|
1450017 | 1450029 | done | {2,4}
|
|
1450017 | 1450030 | running | {1,2}
|
|
1450017 | 1450031 | running | {1,3}
|
|
1450017 | 1450032 | running | {1,4}
|
|
(8 rows)
|
|
|
|
ALTER SYSTEM RESET citus.max_background_task_executors_per_node;
|
|
SELECT pg_reload_conf();
|
|
pg_reload_conf
|
|
---------------------------------------------------------------------
|
|
t
|
|
(1 row)
|
|
|
|
-- if pg_cancel_backend is called on one of the running task PIDs
|
|
-- task doesn't restart because it's not allowed anymore by the limit.
|
|
-- node with id 1 can be used only once, unless there are previously running tasks
|
|
SELECT pid AS task_id6_pid FROM pg_dist_background_task WHERE task_id IN (:task_id6) \gset
|
|
SELECT pg_cancel_backend(:task_id6_pid); -- cancel task_id6 process
|
|
pg_cancel_backend
|
|
---------------------------------------------------------------------
|
|
t
|
|
(1 row)
|
|
|
|
-- task goes to only runnable state, not running anymore.
|
|
SELECT citus_task_wait(:task_id6, desired_status => 'runnable');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
-- show that cancelled task hasn't restarted because limit doesn't allow it
|
|
SELECT job_id, task_id, status, nodes_involved FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4,
|
|
:task_id5, :task_id6, :task_id7, :task_id8)
|
|
ORDER BY job_id, task_id;
|
|
job_id | task_id | status | nodes_involved
|
|
---------------------------------------------------------------------
|
|
1450017 | 1450025 | done | {1,2}
|
|
1450017 | 1450026 | done | {3,4}
|
|
1450017 | 1450027 | done | {1,2}
|
|
1450017 | 1450028 | done | {1,3}
|
|
1450017 | 1450029 | done | {2,4}
|
|
1450017 | 1450030 | runnable | {1,2}
|
|
1450017 | 1450031 | running | {1,3}
|
|
1450017 | 1450032 | running | {1,4}
|
|
(8 rows)
|
|
|
|
SELECT citus_task_wait(:task_id7, desired_status => 'done');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id8, desired_status => 'done');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_task_wait(:task_id6, desired_status => 'running');
|
|
citus_task_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
-- show that the 6th task has restarted only after both 6 and 7 are done
|
|
-- since we have a limit of 1 background task executor per node with id 1
|
|
SELECT job_id, task_id, status, nodes_involved FROM pg_dist_background_task
|
|
WHERE task_id IN (:task_id1, :task_id2, :task_id3, :task_id4,
|
|
:task_id5, :task_id6, :task_id7, :task_id8)
|
|
ORDER BY job_id, task_id;
|
|
job_id | task_id | status | nodes_involved
|
|
---------------------------------------------------------------------
|
|
1450017 | 1450025 | done | {1,2}
|
|
1450017 | 1450026 | done | {3,4}
|
|
1450017 | 1450027 | done | {1,2}
|
|
1450017 | 1450028 | done | {1,3}
|
|
1450017 | 1450029 | done | {2,4}
|
|
1450017 | 1450030 | running | {1,2}
|
|
1450017 | 1450031 | done | {1,3}
|
|
1450017 | 1450032 | done | {1,4}
|
|
(8 rows)
|
|
|
|
SELECT citus_job_cancel(:job_id1);
|
|
citus_job_cancel
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT citus_job_wait(:job_id1);
|
|
citus_job_wait
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
ALTER SYSTEM RESET citus.max_background_task_executors_per_node;
|
|
SELECT pg_reload_conf();
|
|
pg_reload_conf
|
|
---------------------------------------------------------------------
|
|
t
|
|
(1 row)
|
|
|
|
SET client_min_messages TO WARNING;
|
|
TRUNCATE pg_dist_background_job CASCADE;
|
|
TRUNCATE pg_dist_background_task CASCADE;
|
|
TRUNCATE pg_dist_background_task_depend;
|
|
DROP SCHEMA background_task_queue_monitor CASCADE;
|
|
RESET client_min_messages;
|
|
ALTER SYSTEM RESET citus.background_task_queue_interval;
|
|
ALTER SYSTEM RESET citus.max_background_task_executors;
|
|
SELECT pg_reload_conf();
|
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pg_reload_conf
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---------------------------------------------------------------------
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t
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(1 row)
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