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From 8fef58405fbac15c0ea93f0d890b114c870de0cc Mon Sep 17 00:00:00 2001
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From: Damien Ciabrini <dciabrin@redhat.com>
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Date: Wed, 8 Nov 2017 15:19:33 +0100
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Subject: [PATCH] galera: recover from empty gvwstate.dat
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While running, a galera node keeps track of the last known state of
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the cluster in a temporary file gvwstate.dat. This file is normally
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deleted once a node is shutdown gracefully.
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Some ungraceful shutdowns can leave an empty gvwstate.dat on
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disk. This will prevent galera to join the cluster if it is
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configured to attempt PC recovery. Removing that file makes the
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node fall back to the normal, unoptimized joining process next
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time it is restarted.
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---
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heartbeat/galera | 11 +++++++++++
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1 file changed, 11 insertions(+)
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diff --git a/heartbeat/galera b/heartbeat/galera
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index ab121a4be..ee8451427 100755
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--- a/heartbeat/galera
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+++ b/heartbeat/galera
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@@ -586,6 +586,17 @@ detect_last_commit()
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local recovery_file_regex='s/.*WSREP\:.*position\s*recovery.*--log_error='\''\([^'\'']*\)'\''.*/\1/p'
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local recovered_position_regex='s/.*WSREP\:\s*[R|r]ecovered\s*position.*\:\(.*\)\s*$/\1/p'
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+ # codership/galera#354
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+ # Some ungraceful shutdowns can leave an empty gvwstate.dat on
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+ # disk. This will prevent galera to join the cluster if it is
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+ # configured to attempt PC recovery. Removing that file makes the
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+ # node fall back to the normal, unoptimized joining process.
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+ if [ -f ${OCF_RESKEY_datadir}/gvwstate.dat ] && \
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+ [ ! -s ${OCF_RESKEY_datadir}/gvwstate.dat ]; then
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+ ocf_log warn "empty ${OCF_RESKEY_datadir}/gvwstate.dat detected, removing it to prevent PC recovery failure at next restart"
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+ rm -f ${OCF_RESKEY_datadir}/gvwstate.dat
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+ fi
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+
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ocf_log info "attempting to detect last commit version by reading ${OCF_RESKEY_datadir}/grastate.dat"
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last_commit="$(cat ${OCF_RESKEY_datadir}/grastate.dat | sed -n 's/^seqno.\s*\(.*\)\s*$/\1/p')"
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if [ -z "$last_commit" ] || [ "$last_commit" = "-1" ]; then
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