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From "Vinod Kone (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MESOS-351) Master detector should not block on zookeeper 'get' method
Date Fri, 15 Feb 2013 00:19:12 GMT
Vinod Kone created MESOS-351:
--------------------------------

             Summary: Master detector should not block on zookeeper 'get' method
                 Key: MESOS-351
                 URL: https://issues.apache.org/jira/browse/MESOS-351
             Project: Mesos
          Issue Type: Bug
            Reporter: Vinod Kone


Currently, the master detector code calls zk->get() in its detectMaster() method. Under
the covers, we call zoo_aget(...., callback,....) and block till the callback is called.

At Twitter, we encountered a situation where zk->get() got blocked because the callback
was never called by the underlying zookeeper library. Even if a watch expired indicating session
expired, the detector would not process it because it is blocked in detectMaster().

I will add some data below.

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