Machine becomes unresponsive when using network-based filesystems such as CIFS or NFS when filesystems are under very heavy load.
Issue
-
The machine will periodically become unresponsive when issuing large amounts of traffic across a network-based filesystem. Hung task call traces will begin to appear in
/var/log/messagesdue to unresponsive processes. -
In addition to the above network-based filesystem connections will begin to timeout:
nfs: server hostname not responding, still trying
CIFS VFS: Server 192.168.166.210 has not responded in 300 seconds. Reconnecting...
Environment
- Red Hat Enterprise Linux (RHEL) 6
- Network-based filesystem
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