|Title||Fixed possible deadlock in shutdown/restart procedure|
|Check_MK Edition||Check_MK Enterprise Edition (CEE)|
|Level||1 - Trivial Change|
|Compatibility||Compatible - no manual interaction needed|
During the shutdown/restart procedure of the livestatus proxy daemon a deadlock could occur. It seems this could rarely happen when the system running the process is under high load together with a large number of sites (>100) configured.
When this situation occures, you can see several left over liveproxyd processes (master + several site processes) which can only be terminated with SIGKILL. When looking at the processes with strace, you can see hanging futex() calls.
Workaround: In such a situation it is safe to simply kill all those processes using SIGKILL and start a clean liveproxyd processes after that.