ASF GitHub Bot commented on TRAFODION-2236:

GitHub user sbroeder opened a pull request:



    TM crashes during startup

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    $ git pull https://github.com/sbroeder/incubator-trafodion sean_traf3

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    This closes #723
commit a84e0527571e920a08a577aba50fc4741078fe45
Author: Sean Broeder <sbroeder@edev05.esgyn.local>
Date:   2016-09-22T19:38:16Z

    TM crashes during startup


> TM crashesh following sqstart
> -----------------------------
>                 Key: TRAFODION-2236
>                 URL: https://issues.apache.org/jira/browse/TRAFODION-2236
>             Project: Apache Trafodion
>          Issue Type: Bug
>          Components: dtm
>    Affects Versions: 2.0-incubating
>            Reporter: Sean Broeder
>            Assignee: Sean Broeder
>             Fix For: 2.1-incubating
> When Trafodion is stopped abruptly when a region server has current recovery 
> requests posted in Zookeeper, the new TMs may be unable to start.  This 
> happens because the TM recovery thread reads the ZK entries and attempts to 
> send the recovery resolution to the region server that posted the entry.  It 
> gets a connection error because that region server no longer exists.
> The partial solution is to remove the ZK entries as part of startup so the TM 
> can startup without error.
> THis is safe to do because any region server needing recovery will repost to 
> zookeeper and the TM will have no issues connecting to this RS.
> An additional fix will be made to the TM to handle exceptions in trying to 
> communicate with region servers during recovery.

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