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https://issues.apache.org/jira/browse/HBASE-5666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244471#comment-13244471
]
stack commented on HBASE-5666:
------------------------------
On creation of ZooKeeperWatcher, we do following. Why is it not sufficient?
{code}
// The first call against zk can fail with connection loss. Seems common.
// Apparently this is recoverable. Retry a while.
// See http://wiki.apache.org/hadoop/ZooKeeper/ErrorHandling
// TODO: Generalize out in ZKUtil.
long wait = conf.getLong(HConstants.ZOOKEEPER_RECOVERABLE_WAITTIME,
HConstants.DEFAULT_ZOOKEPER_RECOVERABLE_WAITIME);
long finished = System.currentTimeMillis() + wait;
KeeperException ke = null;
do {
try {
ZKUtil.createAndFailSilent(this, baseZNode);
ke = null;
break;
} catch (KeeperException.ConnectionLossException e) {
if (LOG.isDebugEnabled() &&
(isFinishedRetryingRecoverable(finished))) {
LOG.debug("Retrying zk create for another " +
(finished - System.currentTimeMillis()) +
"ms; set 'hbase.zookeeper.recoverable.waittime' to change " +
"wait time); " + e.getMessage());
}
ke = e;
}
} while (isFinishedRetryingRecoverable(finished));
{code}
Is the wait too short?
> RegionServer doesn't retry to check if base node is available
> -------------------------------------------------------------
>
> Key: HBASE-5666
> URL: https://issues.apache.org/jira/browse/HBASE-5666
> Project: HBase
> Issue Type: Bug
> Components: regionserver, zookeeper
> Reporter: Matteo Bertozzi
> Assignee: Matteo Bertozzi
> Attachments: HBASE-5666-v1.patch, HBASE-5666-v2.patch,
> HBASE-5666-v3.patch, HBASE-5666-v4.patch, hbase-1-regionserver.log,
> hbase-2-regionserver.log, hbase-3-regionserver.log, hbase-master.log,
> hbase-regionserver.log, hbase-zookeeper.log
>
>
> I've a script that starts hbase and a couple of region servers in distributed
> mode (hbase.cluster.distributed = true)
> {code}
> $HBASE_HOME/bin/start-hbase.sh
> $HBASE_HOME/bin/local-regionservers.sh start 1 2 3
> {code}
> but the region servers are not able to start...
> It seems that during the RS start the the znode is still not available, and
> HRegionServer.initializeZooKeeper() check just once if the base not is
> available.
> {code}
> 2012-03-28 21:54:05,013 INFO
> org.apache.hadoop.hbase.regionserver.HRegionServer: STOPPED: Check the value
> configured in 'zookeeper.znode.parent'. There could be a mismatch with the
> one configured in the master.
> 2012-03-28 21:54:08,598 FATAL
> org.apache.hadoop.hbase.regionserver.HRegionServer: ABORTING region server
> localhost,60202,1332964444824: Initialization of RS failed. Hence aborting
> RS.
> java.io.IOException: Received the shutdown message while waiting.
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.blockAndCheckIfStopped(HRegionServer.java:626)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.initializeZooKeeper(HRegionServer.java:596)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.preRegistrationInitialization(HRegionServer.java:558)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:672)
> at java.lang.Thread.run(Thread.java:662)
> {code}
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