Live Migration Fails With Error: "Too many open files
Problem
- Live migration of an instance fails with error "Too many open files" as see in /var/log/nova/nova-conductor.log.
- Below errors are seen in /var/log/pf9/ostackhost.log.
Environment
- Platform9 Managed OpenStack - v3.6.0 and Higher
Cause
For the majority of operating systems, 1024 is the maximum number of open files per process. But for the pf9-ostackhost process, we can see that the threshold has been crossed and there are 1158 files opened.
This indicates that pf9-ostackhost service has 1158 open files and has crossed the limit of 1024.
Resolution
Restart pf9-ostackhost service on the affected host.
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