Werk #5590: Fixed possible deadlock in shutdown/restart procedure
| Component | Livestatus proxy |
| Title | Fixed possible deadlock in shutdown/restart procedure |
| Date | Jan 2, 2018 |
| Checkmk Edition | Checkmk Enterprise (CEE) |
| Checkmk Version | 1.5.0i3 |
| Level | Trivial Change |
| Class | Bug Fix |
| 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.
