Server ran out of file handles during manual NetApp failover
Issue
- During a planned NetApp maintenance with graceful failover from one Netapp controller to the other, the RHEL kernel suddenly and unexpectedly used up all 129,000 file handles.
- LSOF of the server at the time showed only a few thousand file handles in use by all processes combined.
Environment
- Red Hat Enterprise Linux, version 6
- HP DL series system
- Fibre connected NetApp filer
- Vertica Database application
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