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https://issues.apache.org/jira/browse/HIVE-6755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrey Stepachev updated HIVE-6755:
-----------------------------------
Description:
Driver holds instance for ZkHiveLockManager. In turn SqlQuery holds it too. So
if we have many not closed queries we will get many zk sessions.
was:
Code below in case of any errors in zooKeeper.create statement leaves unclosed
zookeeper instance.
Thats lead to connection exhausting on zookeeper over time.
{code:title=ZooKeeperHiveLockManager.java|borderStyle=solid}
try {
renewZookeeperInstance(sessionTimeout, quorumServers);
parent = conf.getVar(HiveConf.ConfVars.HIVE_ZOOKEEPER_NAMESPACE);
try {
zooKeeper.create("/" + parent, new byte[0], Ids.OPEN_ACL_UNSAFE,
CreateMode.PERSISTENT);
} catch (KeeperException e) {
// ignore if the parent already exists
if (e.code() != KeeperException.Code.NODEEXISTS) {
LOG.warn("Unexpected ZK exception when creating parent node /" +
parent, e);
}
}
} catch (Exception e) {
LOG.error("Failed to create ZooKeeper object: ", e);
throw new
LockException(ErrorMsg.ZOOKEEPER_CLIENT_COULD_NOT_BE_INITIALIZED.getMsg());
}
{code}
> Zookeeper Lock Manager leaks zookeeper connections.
> ---------------------------------------------------
>
> Key: HIVE-6755
> URL: https://issues.apache.org/jira/browse/HIVE-6755
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Affects Versions: 0.12.0
> Environment: cloudera cdh5b2
> Reporter: Andrey Stepachev
> Priority: Critical
>
> Driver holds instance for ZkHiveLockManager. In turn SqlQuery holds it too.
> So if we have many not closed queries we will get many zk sessions.
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