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Directly register router xact callbacks in PG_init 

Not entirely sure why we went with the shared memory hook approach, but
it causes problems (multiple registration) during crashes. Changing to
a simple direct registration call from PG_init.
pull/818/head
Jason Petersen 2016-09-28 10:42:42 -06:00
parent e2f720dbe7
commit 5f6264105d
No known key found for this signature in database
GPG Key ID: 9F1D3510D110ABA9
3 changed files with 3 additions and 24 deletions
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23
src/backend/distributed/executor/multi_router_executor.c
View File

@ -80,7 +80,6 @@ bool AllModificationsCommutative = false;
*/
static HTAB *xactParticipantHash = NULL;
static List *xactShardConnSetList = NIL;
static shmem_startup_hook_type prev_shmem_startup_hook = NULL;
static bool subXactAbortAttempted = false;
/* functions needed during start phase */
@ -113,7 +112,6 @@ static void RecordShardIdParticipant(uint64 affectedShardId,
NodeConnectionEntry *participantEntry);
/* functions needed by callbacks and hooks */
static void RegisterRouterExecutorXactCallbacks(void);
static void RouterTransactionCallback(XactEvent event, void *arg);
static void RouterSubtransactionCallback(SubXactEvent event, SubTransactionId subId,
SubTransactionId parentSubid, void *arg);
@ -1202,32 +1200,13 @@ RouterExecutorEnd(QueryDesc *queryDesc)
/*
* InstallRouterExecutorShmemHook simply installs a hook (intended to be called
* once during backend startup), which will itself register all the transaction
* callbacks needed by this executor.
* RegisterRouterExecutorXactCallbacks registers this executor's callbacks.
*/
void
InstallRouterExecutorShmemHook(void)
{
prev_shmem_startup_hook = shmem_startup_hook;
shmem_startup_hook = RegisterRouterExecutorXactCallbacks;
}
/*
* RegisterRouterExecutorXactCallbacks registers (sub-)transaction callbacks
* needed by this executor before calling any previous shmem startup hooks.
*/
static void
RegisterRouterExecutorXactCallbacks(void)
{
RegisterXactCallback(RouterTransactionCallback, NULL);
RegisterSubXactCallback(RouterSubtransactionCallback, NULL);
if (prev_shmem_startup_hook != NULL)
{
prev_shmem_startup_hook();
}
}

2
src/backend/distributed/shared_library_init.c
View File

@ -154,7 +154,7 @@ _PG_init(void)
WorkerNodeRegister();
/* initialize transaction callbacks */
InstallRouterExecutorShmemHook();
RegisterRouterExecutorXactCallbacks();
InstallMultiShardXactShmemHook();
}

2
src/include/distributed/multi_router_executor.h
View File

@ -37,6 +37,6 @@ extern void RouterExecutorStart(QueryDesc *queryDesc, int eflags, Task *task);
extern void RouterExecutorRun(QueryDesc *queryDesc, ScanDirection direction, long count);
extern void RouterExecutorFinish(QueryDesc *queryDesc);
extern void RouterExecutorEnd(QueryDesc *queryDesc);
extern void InstallRouterExecutorShmemHook(void);
extern void RegisterRouterExecutorXactCallbacks(void);
#endif /* MULTI_ROUTER_EXECUTOR_H_ */