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Problem:- To create file in /tmp dir mysqld require permission initrc_tmp_t.
And mysqld does not have his permission.
Solution:- Instead of giving mysqld permission of initrc_tmp_t , we redirected
log to file in /tmp dir through shell. I also removed a earlier workarround
in mysqld_safe.sh , which create tmp log file in datadir.
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During wsrep position recovery, galera_recovery.sh script
redirected mysqld's error log to a temporary file in order
to find the start position. This, however, will not work
if --log-error is configured for the server.
Fixed by using --log-error in command line instead of
redirection.
[Patch contributed by Philippe MARASSE]
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Galera recovery process works in two phases. In the first
phase, mysqld is started as non-daemon with --wsrep-recover
to recover and fetch the last logged global transaction ID.
This ID is then used in second phase as the start position
(--wsrep-start-position=XX) to start mysqld as daemon.
As this process was implemented in mysqld_safe script, the
recovery did not work when server was started using systemd.
Fixed by introducing a shell script (wsrep_recovery.sh) that
mimics the first phase of the recovery process.
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