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| author | Alan Conway <aconway@apache.org> | 2009-08-10 21:10:53 +0000 |
|---|---|---|
| committer | Alan Conway <aconway@apache.org> | 2009-08-10 21:10:53 +0000 |
| commit | 9a0521e5562ba6bf5c3468eb171c109e166cfa5d (patch) | |
| tree | a0f3e6be8d28b634a0e2ee94d5fd853dc3562ffb /python/qpid/framer.py | |
| parent | 5518c23f9a69f6d616abc770bda0677b2f0b51ac (diff) | |
| download | qpid-python-9a0521e5562ba6bf5c3468eb171c109e166cfa5d.tar.gz | |
Watchdog feature to remove unresponsive cluster nodes.
In some intstances (e.g. while resolving an error) it's possible for a
hung process to hang the entire cluster as they wait for its response.
The cluster can handle terminated processes but hung processes present
a problem.
If the watchdog plugin is loaded and --watchdog-interval is set then
the broker forks a child process that runs a very simple watchdog
program, and starts a timer in the broker process to signal the watchdog
every interval/2 seconds. The watchdog kills its parent if it does not
receive a signal for interval seconds. This allows a stuck broker to be
removed from the cluster so other cluster members can continue.
git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@802927 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'python/qpid/framer.py')
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