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| author | Robert Haas <rhaas@postgresql.org> | 2015-10-16 09:42:33 -0400 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2015-10-16 09:49:08 -0400 |
| commit | 26981d292758c6ee9185332e4abc990ff19c81a2 (patch) | |
| tree | a3c650b277ace15358b25c15da181e465f242b6d /src/backend/access/transam/parallel.c | |
| parent | a93b3782e3358cbb1ad8d65386a2e1478b805649 (diff) | |
| download | postgresql-26981d292758c6ee9185332e4abc990ff19c81a2.tar.gz postgresql-26981d292758c6ee9185332e4abc990ff19c81a2.zip | |
Don't send protocol messages to a shm_mq that no longer exists.
Commit 2bd9e412f92bc6a68f3e8bcb18e04955cc35001d introduced a mechanism
for relaying protocol messages from a background worker to another
backend via a shm_mq. However, there was no provision for shutting
down the communication channel. Therefore, a protocol message sent
late in the shutdown sequence, such as a DEBUG message resulting from
cranking up log_min_messages, could crash the server. To fix, install
an on_dsm_detach callback that disables sending messages to the shm_mq
when the associated DSM is detached.
Diffstat (limited to 'src/backend/access/transam/parallel.c')
| -rw-r--r-- | src/backend/access/transam/parallel.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/access/transam/parallel.c b/src/backend/access/transam/parallel.c index 29d6ed57cc2..0b94c0f87e9 100644 --- a/src/backend/access/transam/parallel.c +++ b/src/backend/access/transam/parallel.c @@ -867,7 +867,7 @@ ParallelWorkerMain(Datum main_arg) ParallelWorkerNumber * PARALLEL_ERROR_QUEUE_SIZE); shm_mq_set_sender(mq, MyProc); mqh = shm_mq_attach(mq, seg, NULL); - pq_redirect_to_shm_mq(mq, mqh); + pq_redirect_to_shm_mq(seg, mqh); pq_set_parallel_master(fps->parallel_master_pid, fps->parallel_master_backend_id); |