We tracked the problem down to the following rsyslog configuration in our test cluster:
*.* @@<log_host>:<log_port>
$ActionExecOnlyWhenPreviousIsSuspended on
& /var/log/failover.log
$ActionExecOnlyWhenPreviousIsSuspended off
It seems that the $ActionExecOnlyWhenPreviousIsSuspended directive doesn't work well with the $RepeatedMsgReduction directive we have in our main rsyslog.conf, as the rsyslog documentation warns:
On Wed, Jul 27, 2016 at 12:34 PM, Karsten Heymann <karsten.heymann@xxxxxxxxx> wrote:
Hi,
The syslog socket will block if it can't deliver it's logs. This happens for example if logs are forwarded to a remote loghost via tcp and the remote server becomes unavailable.
Best
Karsten
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