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From Panayotis Antonopoulos <antonopoulos...@hotmail.com>
Subject RE: Datanode doesn't start but there is no exception in the log
Date Fri, 13 May 2011 18:09:36 GMT

I have been waiting for hours to see if it will ever start but it doesn't.
I will check the links you sent me.

Thanks again for your help!!!

> From: harsh@cloudera.com
> Date: Fri, 13 May 2011 23:18:40 +0530
> Subject: Re: Datanode doesn't start but there is no exception in the log
> To: common-user@hadoop.apache.org
> 
> Actually, only the last mentioned stack matters. Also see:
> https://issues.apache.org/jira/browse/HDFS-1835
> 
> On Fri, May 13, 2011 at 11:15 PM, Harsh J <harsh@cloudera.com> wrote:
> > Hey,
> >
> > 2011/5/13 Panayotis Antonopoulos <antonopoulospan@hotmail.com>:
> >> "899599744@qtp-1416044437-1 - Acceptor0 SelectChannelConnector@0.0.0.0:50075"
prio=10 tid=0x00007f50f8414800 nid=0x1926 runnable [0x00007f50f6eb1000]
> >>   java.lang.Thread.State: RUNNABLE
> >>    at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
> >>    at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:210)
> >>    at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
> >>    at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
> >>    - locked <0x00000000ec473870> (a sun.nio.ch.Util$2)
> >>    - locked <0x00000000ec473860> (a java.util.Collections$UnmodifiableSet)
> >>    - locked <0x00000000ec4733c8> (a sun.nio.ch.EPollSelectorImpl)
> >>    at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
> >>    at org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:498)
> >>    at org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:192)
> >>    at org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnector.java:124)
> >>    at org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:708)
> >>    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> >
> > and,
> >
> >> "1620640756@qtp-1416044437-0" prio=10 tid=0x00007f50f83f0800 nid=0x1925 in Object.wait()
[0x00007f50f75eb000]
> >>   java.lang.Thread.State: TIMED_WAITING (on object monitor)
> >>    at java.lang.Object.wait(Native Method)
> >>    - waiting on <0x00000000ec473a88> (a org.mortbay.thread.QueuedThreadPool$PoolThread)
> >>    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:626)
> >>    - locked <0x00000000ec473a88> (a org.mortbay.thread.QueuedThreadPool$PoolThread)
> >
> > and,
> >
> >> "main" prio=10 tid=0x0000000040115000 nid=0x18d2 runnable [0x00007f5101d2e000]
> >>   java.lang.Thread.State: RUNNABLE
> >>    at java.io.FileInputStream.readBytes(Native Method)
> >>    at java.io.FileInputStream.read(FileInputStream.java:220)
> >>    at sun.security.provider.SeedGenerator$URLSeedGenerator.getSeedBytes(SeedGenerator.java:493)
> >>    at sun.security.provider.SeedGenerator.generateSeed(SeedGenerator.java:117)
> >>    at sun.security.provider.SecureRandom.engineGenerateSeed(SecureRandom.java:114)
> >>    at sun.security.provider.SecureRandom.engineNextBytes(SecureRandom.java:171)
> >>    - locked <0x00000000eb430cc0> (a sun.security.provider.SecureRandom)
> >>    at java.security.SecureRandom.nextBytes(SecureRandom.java:433)
> >>    - locked <0x00000000eb430f60> (a java.security.SecureRandom)
> >>    at java.security.SecureRandom.next(SecureRandom.java:455)
> >>    at java.util.Random.nextInt(Random.java:257)
> >>    at org.apache.hadoop.hdfs.server.datanode.DataNode.setNewStorageID(DataNode.java:608)
> >>    at org.apache.hadoop.hdfs.server.datanode.DataNode.register(DataNode.java:629)
> >>    at org.apache.hadoop.hdfs.server.datanode.DataNode.runDatanodeDaemon(DataNode.java:1378)
> >>    at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1438)
> >>    at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1563)
> >>    at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1573)
> >
> > lead me to believe that you're running into this:
> > http://search-hadoop.com/m/7Giae6vLWR1/securerandom&subj=Re+Entropy+Pool+and+HDFS+FS+Commands+Hanging+System
> >
> > Just give it some time and it should start up soon (you may generate
> > some other activity on the DN to help it get some fresh entropy).
> > Sometimes it may take up to a minute at start up.
> >
> > --
> > Harsh J
> >
> 
> 
> 
> -- 
> Harsh J
 		 	   		  
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