From: Robert Haas <rhaas@postgresql.org>
Date: Fri, 6 Apr 2018 23:28:48 +0000 (-0400)
Subject: Fix possible failure in parallel index build.
X-Git-Url: http://git.postgresql.org/gitweb/-?a=commitdiff_plain;h=47cb9ca49a611fa518e1a0fe46526507c96a5612;p=users%2Frhaas%2Fpostgres.git

Fix possible failure in parallel index build.

Report and proposed fix by David Rowley, put in patch form by
Peter Geoghegan.

Discussion: http://postgr.es/m/CAKJS1f91kq1wfYR8rnRRfKtxyhU2woEA+=whd640UxMyU+O0EQ@mail.gmail.com
---

diff --git a/src/backend/catalog/index.c b/src/backend/catalog/index.c
index bc99a60d34..b8e9f9f9c7 100644
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -4064,8 +4064,7 @@ RemoveReindexPending(Oid indexOid)
 static void
 ResetReindexPending(void)
 {
-	if (IsInParallelMode())
-		elog(ERROR, "cannot modify reindex state during a parallel operation");
+	/* This may be called in leader error path */
 	pendingReindexedIndexes = NIL;
 }