[Bug 985489] Re: nova-compute stops processing compute.$HOSTNAME occasionally

[Andrew Glen-Young]

This has happened again.

Process listing:

$ ps auxwwwf | grep [n]ova-compute

nova     25735  0.0  0.0  48040     4 ?        Ss   Apr16   0:00 su -s /bin/sh -c exec nova-compute --flagfile=/etc/nova/nova.conf --flagfile=/etc/nova/nova-compute.conf nova
nova     25746  1.2  0.1 1725088 32604 ?       Sl   Apr16  53:22  \_ /usr/bin/python /usr/bin/nova-compute --flagfile=/etc/nova/nova.conf --flagfile=/etc/nova/nova-compute.conf

Strace'ing the parent process:

$ sudo strace -p 25735
Process 25735 attached - interrupt to quit
wait4(-1, 
^C

Strace'ing the child process

$ sudo strace -p 25746
Process 25746 attached - interrupt to quit
restart_syscall(<... resuming interrupted call ...>
^C

Checking libvirtd:

$ time sudo virsh list | wc -l
33

real    0m0.170s
user    0m0.020s
sys     0m0.012s

Last few lines from /var/log/nova/nova-compute.log:

2012-04-19 07:04:28 DEBUG nova.manager [-] Running periodic task ComputeManager._poll_bandwidth_usage from (pid=25746) periodic_tasks /usr/lib/python2.7/dist-packages/nova/manager.py:152
2012-04-19 07:04:28 INFO nova.compute.manager [-] Updating bandwidth usage cache
2012-04-19 07:04:28 DEBUG nova.manager [-] Running periodic task ComputeManager.update_available_resource from (pid=25746) periodic_tasks /usr/lib/python2.7/dist-packages/nova/manager.py:152
--- restart happens now ---
2012-04-19 13:54:25 DEBUG nova.service [-] Full set of FLAGS: from (pid=1012) wait /usr/lib/python2.7/dist-packages/nova/service.py:402
2012-04-19 13:54:25 DEBUG nova.service [-] default_floating_pool : nova from (pid=1012) wait /usr/lib/python2.7/dist-packages/nova/service.py:411

Conclusion: libvirtd is responding, but nova-compute is not.

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https://bugs.launchpad.net/bugs/985489

Title:
  nova-compute stops processing compute.$HOSTNAME occasionally

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