Parsed test spec with 2 sessions starting permutation: s1-add-second-node s1-begin s2-begin s2-create-distributed-table s1-noshards s2-commit s1-commit s2-shardcounts ?column? 1 step s1-add-second-node: SELECT 1 FROM master_add_node('localhost', 57638); ?column? 1 step s1-begin: BEGIN; step s2-begin: BEGIN; step s2-create-distributed-table: CREATE TABLE t1 (a int); -- session needs to have replication factor set to 1, can't do in setup SET citus.shard_replication_factor TO 1; SELECT create_distributed_table('t1', 'a'); create_distributed_table step s1-noshards: SELECT * from master_set_node_property('localhost', 57637, 'shouldhaveshards', false); step s2-commit: COMMIT; step s1-noshards: <... completed> master_set_node_property step s1-commit: COMMIT; step s2-shardcounts: SELECT nodeport, count(*) FROM pg_dist_shard JOIN pg_dist_shard_placement USING (shardid) WHERE logicalrelid = 't1'::regclass GROUP BY nodeport ORDER BY nodeport; nodeport count 57637 2 57638 2 master_remove_node starting permutation: s1-add-second-node s1-begin s2-begin s1-noshards s2-create-distributed-table s1-commit s2-commit s2-shardcounts ?column? 1 step s1-add-second-node: SELECT 1 FROM master_add_node('localhost', 57638); ?column? 1 step s1-begin: BEGIN; step s2-begin: BEGIN; step s1-noshards: SELECT * from master_set_node_property('localhost', 57637, 'shouldhaveshards', false); master_set_node_property step s2-create-distributed-table: CREATE TABLE t1 (a int); -- session needs to have replication factor set to 1, can't do in setup SET citus.shard_replication_factor TO 1; SELECT create_distributed_table('t1', 'a'); step s1-commit: COMMIT; step s2-create-distributed-table: <... completed> create_distributed_table step s2-commit: COMMIT; step s2-shardcounts: SELECT nodeport, count(*) FROM pg_dist_shard JOIN pg_dist_shard_placement USING (shardid) WHERE logicalrelid = 't1'::regclass GROUP BY nodeport ORDER BY nodeport; nodeport count 57638 4 master_remove_node starting permutation: s1-begin s2-begin s1-noshards s2-update-node s1-commit s2-commit ?column? 1 step s1-begin: BEGIN; step s2-begin: BEGIN; step s1-noshards: SELECT * from master_set_node_property('localhost', 57637, 'shouldhaveshards', false); master_set_node_property step s2-update-node: select * from master_update_node((select nodeid from pg_dist_node where nodeport = 57637), 'localhost', 57638) step s1-commit: COMMIT; step s2-update-node: <... completed> master_update_node step s2-commit: COMMIT; master_remove_node starting permutation: s1-begin s2-begin s2-update-node s1-noshards s2-commit s1-commit ?column? 1 step s1-begin: BEGIN; step s2-begin: BEGIN; step s2-update-node: select * from master_update_node((select nodeid from pg_dist_node where nodeport = 57637), 'localhost', 57638) master_update_node step s1-noshards: SELECT * from master_set_node_property('localhost', 57637, 'shouldhaveshards', false); step s2-commit: COMMIT; step s1-noshards: <... completed> error in steps s2-commit s1-noshards: ERROR: node at "localhost:xxxxx" does not exist step s1-commit: COMMIT; master_remove_node