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From "Keith Turner (Created) (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-513) Need to deal with half-dead tservers
Date Wed, 04 Apr 2012 18:23:22 GMT
Need to deal with half-dead tservers

                 Key: ACCUMULO-513
             Project: Accumulo
          Issue Type: New Feature
            Reporter: Keith Turner
             Fix For: 1.5.0

Every once in a while a tablet server will go zombie.  The tablet server is alive and talking
to the master and zookeeper, but not accepting new connections from clients.  To keep these
types of tablet servers from causing problems a process could try to scan a tablet on each
tablet server periodically.  If it can not scan a tablet within a certain number of tries,
it could delete the tservers lock in zookeeper.  The monitor process could do this.  

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