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From Nabib El-Rahman <nabib.elrah...@tubemogul.com>
Subject Hbase RegionServer stalls on initialization
Date Wed, 28 Mar 2012 17:32:43 GMT
Hi Guys,

I'm starting up an region server and it stalls on initialization.  I took a thread dump and
found it hanging on this spot:

"regionserver60020" prio=10 tid=0x00007fa90c5c4000 nid=0x4b50 in Object.wait() [0x00007fa9101b4000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000000bc63b2b8> (a org.apache.hadoop.hbase.MasterAddressTracker)
        at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.blockUntilAvailable(ZooKeeperNodeTracker.java:122)
        - locked <0x00000000bc63b2b8> (a org.apache.hadoop.hbase.MasterAddressTracker)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.blockAndCheckIfStopped(HRegionServer.java:516)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.initializeZooKeeper(HRegionServer.java:493)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.initialize(HRegionServer.java:461)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:560)
        at java.lang.Thread.run(Thread.java:662)


Any Idea on who or what its being blocked on?

Thanks!


Nabib El-Rahman |  Senior Sofware Engineer

M: 734.846.2529
www.tubemogul.com | twitter: @nabiber




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