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https://issues.apache.org/jira/browse/HBASE-7715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13566527#comment-13566527
]
Ted Yu commented on HBASE-7715:
-------------------------------
{code}
"pool-1-thread-1" prio=10 tid=0x09cd1400 nid=0x2ea7 in Object.wait()
[0x772dc000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0xd3914960> (a
org.apache.hadoop.hbase.util.JVMClusterUtil$RegionServerThread)
at java.lang.Thread.join(Thread.java:1194)
- locked <0xd3914960> (a
org.apache.hadoop.hbase.util.JVMClusterUtil$RegionServerThread)
at
org.apache.hadoop.hbase.util.JVMClusterUtil.shutdown(JVMClusterUtil.java:249)
at
org.apache.hadoop.hbase.LocalHBaseCluster.shutdown(LocalHBaseCluster.java:430)
at
org.apache.hadoop.hbase.MiniHBaseCluster.shutdown(MiniHBaseCluster.java:501)
at
org.apache.hadoop.hbase.HBaseTestingUtility.shutdownMiniHBaseCluster(HBaseTestingUtility.java:893)
at
org.apache.hadoop.hbase.HBaseTestingUtility.shutdownMiniCluster(HBaseTestingUtility.java:863)
at
org.apache.hadoop.hbase.TestRegionRebalancing.after(TestRegionRebalancing.java:77)
{code}
I ran TestRegionRebalancing and it passed locally.
> FSUtils#waitOnSafeMode can incorrectly loop on standby NN
> ---------------------------------------------------------
>
> Key: HBASE-7715
> URL: https://issues.apache.org/jira/browse/HBASE-7715
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.4
> Reporter: Andrew Wang
> Assignee: Ted Yu
> Fix For: 0.96.0
>
> Attachments: 7715-trunk-v2.txt, 7715-trunk-v3.txt
>
>
> We encountered an issue where HMaster failed to start with an active NN not
> in safe mode and a standby NN in safemode. The relevant lines in
> {{FSUtils.java}} show the issue:
> {noformat}
> while
> (dfs.setSafeMode(org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction.SAFEMODE_GET))
> {
> {noformat}
> This call skips the normal client failover from the standby to active NN, so
> it will loop polling the standby NN if it unfortunately talks to the standby
> first.
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