Req. for some help with resolving the error "pg_basebackup: could not get WAL end position from server: FATAL: requested WAL segment"

From: "Tharmarajah, Sam" <sambavan(dot)tharmarajah(at)usask(dot)ca>
To: "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org>
Subject: Req. for some help with resolving the error "pg_basebackup: could not get WAL end position from server: FATAL: requested WAL segment"
Date: 2016-12-05 18:57:59
Message-ID: 873181a7a9164ffe8b74c6e425a1a724@Mail02.usask.ca
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Hi

I am a newbie to postgres. We are on postgres 9.1 running on RedHat 6. When we do the postgres backups we are noticing the following errors

pg_basebackup: could not get WAL end position from server: FATAL: requested WAL segment 000000010000020B00000040 has already been removed

But when I look into pg_xlog, I notice

000000010000020B00000040.00000118.backup

May I know how to resolve this error? Are the backups done with these errors, recoverable?

Thanks in advance for your support.

Thanx,
Sam

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