[ https://issues.apache.org/jira/browse/HBASE-5549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
nkeywal updated HBASE-5549: --------------------------- Status: Patch Available (was: Open) > Master can fail if ZooKeeper session expires > -------------------------------------------- > > Key: HBASE-5549 > URL: https://issues.apache.org/jira/browse/HBASE-5549 > Project: HBase > Issue Type: Bug > Components: master, zookeeper > Affects Versions: 0.96.0 > Environment: all > Reporter: nkeywal > Assignee: nkeywal > Priority: Minor > Attachments: 5549.v6.patch > > > There is a retry mechanism in RecoverableZooKeeper, but when the session > expires, the whole ZooKeeperWatcher is recreated, hence the retry mechanism > does not work in this case. This is why a sleep is needed in > TestZooKeeper#testMasterSessionExpired: we need to wait for ZooKeeperWatcher > to be recreated before using the connection. > This can happen in real life, it can happen when: > - master & zookeeper starts > - zookeeper connection is cut > - master enters the retry loop > - in the meantime the session expires > - the network comes back, the session is recreated > - the retries continues, but on the wrong object, hence fails. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira