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Closed
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Case #
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10055
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Affiliated Job:
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New Trier Township District 2031
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Opened:
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Tuesday, September 13, 2011
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Closed:
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Tuesday, September 13, 2011
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Total Hit Count:
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14056
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Last Hit:
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Saturday, December 21, 2024 9:11:22 PM
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Unique Hit Count:
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5334
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Last Unique Hit:
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Saturday, December 21, 2024 9:11:22 PM
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Case Type(s):
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Server, Vendor Support
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Case Notes(s):
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All cases are posted for review purposes only. Any implementations should be performed at your own risk.
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Problem:
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Our Avamar grid appeared to stall for us over a weekend while nothing on our network had changed. Jobs initiated via a schedule had been running for 30 hours straight despite the 12:00 noon blackout window which should have timed-out the jobs but didn't. I proceeded to cancel these jobs and test manual runs (both image level and agent levels) which simply remained in a "waiting" status, allowed a schedule job to begin which never did. In further review I noticed that under "Server" - "Active Sessions" - there were 19 even though from my perspective nothing was running under the "Activity" screen. Additionally, later I received a notice that a recent checkpoint had not run. I contacted EMC support.
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Resolution:
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It turned out there were stalled sessions in a "CLOSE_WAIT" status. They performed the commands in a putty session below to diagnose:
netstat -alp | grep CLOSE
(Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all.)
tcp 1 0 avamar-u.nths.net:28001 avamar-vm-01.domain.local:50441 CLOSE_WAIT 19222/java
tcp 138 0 avamar-u.nths.net:28001 avamar-vm-02.domain.local:46636 CLOSE_WAIT 19222/java ...
... The above demonstrated these "CLOSE_WAIT" - there were 38 of these
The Technician continued by running a manual checkpoint and once this completed, he proceeded by restarting the MCS service:
dpnctl stop mcs
dpnctl start mcs
dpnctl start sched
dpnctl start maint
dpnctl status
dpnctl: INFO: gsan status: ready
dpnctl: INFO: MCS status: up.
dpnctl: INFO: EMS status: up.
dpnctl: INFO: Backup scheduler status: up.
dpnctl: INFO: dtlt status: up.
dpnctl: INFO: axionfs status: up.
dpnctl: INFO: Maintenance windows scheduler status: enabled.
dpnctl: INFO: Maintenance cron jobs status: enabled.
dpnctl: INFO: Unattended startup status: disabled.
This indeed resolved our issue, the next evenings backups proceeded without a hitch.
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