Fix incorrect decision about which lock to take.

Spotted by Tom Lane.

diff --git a/src/backend/storage/lmgr/proc.c b/src/backend/storage/lmgr/proc.c
index 641ef1182b8afd84becf670aab81ab7ea908970f..114fba0d384aa556e8a0de43e97da706e79cf035 100644 (file)
--- a/src/backend/storage/lmgr/proc.c
+++ b/src/backend/storage/lmgr/proc.c
@@ -1805,7 +1805,7 @@ BecomeLockGroupMember(PGPROC *leader, int pid)
         * initialization and never change thereafter; so we will acquire the
         * correct lock even if the leader PGPROC is in process of being recycled.
         */
-       leader_lwlock = LockHashPartitionLockByProc(MyProc);
+       leader_lwlock = LockHashPartitionLockByProc(leader);
        LWLockAcquire(leader_lwlock, LW_EXCLUSIVE);
 
        /* Try to join the group */