x.diff

=== modified file 'Percona-Server/sql/lock.cc'
--- Percona-Server/sql/lock.cc	2012-11-26 13:57:13 +0000
+++ Percona-Server/sql/lock.cc	2013-04-20 05:19:27 +0000
@@ -1085,19 +1085,22 @@
   m_state= GRL_ACQUIRED_AND_BLOCKS_COMMIT;
 
 #ifdef WITH_WSREP
-  long long ret = wsrep->pause(wsrep);
-  if (ret >= 0)
-  {
-    wsrep_locked_seqno= ret;
-  }
-  else if (ret != -ENOSYS) /* -ENOSYS - no provider */
-  {
-    WSREP_ERROR("Failed to pause provider: %lld (%s)", -ret, strerror(-ret));
+  /* Pause the provider given that it is not paused already */
+  if (wsrep_locked_seqno == WSREP_SEQNO_UNDEFINED) {
+    long long ret = wsrep->pause(wsrep);
+    if (ret >= 0)
+    {
+        wsrep_locked_seqno= ret;
+    }
+    else if (ret != -ENOSYS) /* -ENOSYS - no provider */
+    {
+        WSREP_ERROR("Failed to pause provider: %lld (%s)", -ret, strerror(-ret));
 
-    /* m_mdl_blocks_commits_lock is always NULL here */
-    wsrep_locked_seqno= WSREP_SEQNO_UNDEFINED;
-    my_error(ER_LOCK_DEADLOCK, MYF(0));
-    DBUG_RETURN(TRUE);
+        /* m_mdl_blocks_commits_lock is always NULL here */
+        wsrep_locked_seqno= WSREP_SEQNO_UNDEFINED;
+        my_error(ER_LOCK_DEADLOCK, MYF(0));
+        DBUG_RETURN(TRUE);
+    }
   }
 #endif /* WITH_WSREP */
   DBUG_RETURN(FALSE);