- We have a new agent installation that is making the CPU usage climb to 100% + after some time. this is a production system and needs to be resolved right away. I tried to enable the trace logs from the LocalConfig.conf, but the web agent logs is not even showing any update happening on it, so it has become unresponsive.
- SPS 12.52 SP1 CR04
- RHEL 7.2/CentOS 7.2
- The issue was discovered to be a "feature" integrated into RHEL 7, where the semaphores are getting removed by OS after user logout from session.
KB needed created to provide explanation about this situation.
- With RHEL/CentOS 7.2, the system logind will now remove all IPC's (semaphores) for a user when logging out. For some applications this will cause issues. On CA Single Sign-On, this causes the CPU to spike to 100% while it tries to manage the missing IPCs (semaphores).
- As a workaround, all RHEL/CentOS 7.2 or better servers that require CA Single Sign-On will make the following changes:
1. Create directory /usr/lib/systemd/logind.conf.d
2. Create file /usr/lib/systemd/logind.conf.d/siteminder.conf
3. Edit file /usr/lib/systemd/logind.conf.d/siteminder.conf to contain the following:
5. RemoveIPC=noRestart the logind service - systemctl restart systemd-logind