Eason Zhang created TRAFODION-2588:
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Summary: monitor failed to start if part of zookeeper server is
down
Key: TRAFODION-2588
URL: https://issues.apache.org/jira/browse/TRAFODION-2588
Project: Apache Trafodion
Issue Type: Bug
Components: foundation
Reporter: Eason Zhang
Assignee: Eason Zhang
monitor gets zookpper node list from env $ZOOKEEPER_NODES. If one of the
zookeeper server in this node list is down, monitor will not start with
'ZCONNECTIONLOSS' error:
2017-04-11 17:15:49,351, ERROR, ZOO, Node Number: 4294967295,, PIN: 21106 ,
Process Name: zooclient,,, TID: 21106, Message ID: 101370401,
[CZClient::MakeClusterZNodes], zoo_exists() failed with error ZCONNECTIONLOSS
That is because zookeeper c client randomly picks up a zk server to connect
with based on its own node selection algorithm. So the simple solution for
monitor is that we do a retry when connection failed, let zookeeper c client to
pick up another server from the list.
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