Werk #14732: cmk-update-agent: Retry locking
|Title||cmk-update-agent: Retry locking|
|Date||Aug 25, 2022|
|Checkmk Edition||Checkmk Enterprise (CEE)|
|Checkmk Version||2.2.0b1 2.1.0p11 2.0.0p28|
|Compatibility||Compatible - no manual interaction needed|
The agent updater is designed to have no more than one instance running at a time on a host. This is implemented by holding a file lock while running.
We recently observed that a lock may sometimes fail briefly after it was released by a previous agent updater instance, possibly due to some anti virus software.
To mitigate this situation, the locking is now retried 10 times before aborting the agent updater call.