uninitialized page in standby recovery

From: Ray Stell <stellr(at)vt(dot)edu>
To: pgsql-admin(at)lists(dot)postgresql(dot)org
Subject: uninitialized page in standby recovery
Date: 2018-02-05 14:06:58
Message-ID: b1fcef70-d8c5-689c-a3a8-b01e4f212c53@vt.edu
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I built a standby with 9.4.12 and about a day later the standby crashed
with this:

2018-02-02 16:20:44 EST,0, WARNING:  page 1347460 of relation
base/16391/16414 is uninitialized
2018-02-02 16:20:44 EST,0, CONTEXT:  xlog redo visible: rel
1663/16391/16414; blk 1347460
2018-02-02 16:20:44 EST,0, PANIC:  WAL contains references to invalid pages
2018-02-02 16:20:44 EST,0, CONTEXT:  xlog redo visible: rel
1663/16391/16414; blk 1347460
2018-02-02 16:20:44 EST,0, LOG:  startup process (PID 24057) was
terminated by signal 6: Aborted
2018-02-02 16:20:44 EST,0, LOG:  terminating any other active server
processes

Any hints to where the corruption begins?  I don't see any disk i/o
issues.  Not sure what to look for in the release notes,

but I'll try to patch asap, but that is difficult to get done politically.

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