[PGPRO-4074] Allow multiple processes acquire the same repl origen.

arssher · arssher · commit 7b06c79170d9 · 2021-02-28T17:15:00.000+03:00
Slight edit of 3f357ebff64 cherry pick.

tags: multimaster
(cherry picked from commit d33fc4b8c93971a4bcd8b5900004c3e9cc5a8b54)
diff --git a/src/backend/replication/logical/origen.c b/src/backend/replication/logical/origen.c
@@ -1095,7 +1095,13 @@ replorigen_session_setup(RepOriginId node)
 		if (curstate->roident != node)
 			continue;
 
-		else if (curstate->acquired_by != 0)
+		/*
+		 * MTM-CRUTCH.
+		 *
+		 * Allow multiple backends (mm parallel workers) to setup same
+		 * replication session.
+		 */
+		else if (curstate->acquired_by != 0 && DetectGlobalDeadLock == NULL)
 		{
 			ereport(ERROR,
 					(errcode(ERRCODE_OBJECT_IN_USE),
