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From Bill Graham <billgra...@gmail.com>
Subject Re: HBase fails to start - DataXceiver Version Mismatch
Date Tue, 11 Jan 2011 06:48:25 GMT
Thanks guys, I just figured it out. Looking closer in the master logs
I saw that the classpath was including every jar in my maven
repository from $HOME/.m2/*. I have no idea why this is happening
though, since I haven't messed with any properties on environment
variables that would cause this to happen. Very strange. I moved that
directory out of the way and the master started fine.

I can debug how the classpath gets set, but any ideas?


On Mon, Jan 10, 2011 at 10:29 PM, Stack <stack@duboce.net> wrote:
> For sure you removed the old hadoop from hbase/lib?
>
> On Mon, Jan 10, 2011 at 10:12 PM, Bill Graham <billgraham@gmail.com> wrote:
>> Thanks for the quick reply Todd. I did that before I first tried
>> starting HBase, but I'm still seeing the issues. Any other
>> suggestions?
>>
>> On Mon, Jan 10, 2011 at 10:00 PM, Todd Lipcon <todd@cloudera.com> wrote:
>>> Hi Bill,
>>> You simply need to replace the hadoop "core" jar in your HBase lib/
>>> directory with the same version from your HDFS install.
>>> -Todd
>>>
>>> On Mon, Jan 10, 2011 at 9:45 PM, Bill Graham <billgraham@gmail.com> wrote:
>>>>
>>>> Hi,
>>>>
>>>> Today I upgraded from Hadoop 0.20.1 to CHD3b2 0.20.2 to get the append
>>>> functionality that HBase requires and now I can't start HBase. Hadoop
>>>> and HDFS seem to be working just fine, but when I start up the HBase
>>>> master, I get this error in the NNs:
>>>>
>>>> 2011-01-10 21:20:36,134 ERROR
>>>> org.apache.hadoop.hdfs.server.datanode.DataNode:
>>>> DatanodeRegistration(*.*.*.*:50010,
>>>> storageID=DS-662249796-*.*.*.*-50010-1279065963700, infoPort=50075,
>>>> ipcPort=50020):DataXceiver
>>>> java.io.IOException: Version Mismatch
>>>>        at
>>>> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:95)
>>>>
>>>> And this on the HBase master:
>>>>
>>>> 2011-01-10 21:20:39,139 FATAL org.apache.hadoop.hbase.master.HMaster:
>>>> Unhandled exception. Starting shutdown.
>>>> java.io.IOException: Could not obtain block:
>>>> blk_4116902588460384179_696504 file=/hbase-app/hbase/hbase.version
>>>>        at
>>>> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:1864)
>>>>        at
>>>> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1690)
>>>>        at
>>>> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1819)
>>>>        at
>>>> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1747)
>>>>        at
>>>> java.io.DataInputStream.readUnsignedShort(DataInputStream.java:320)
>>>>        at java.io.DataInputStream.readUTF(DataInputStream.java:572)
>>>>        at
>>>> org.apache.hadoop.hbase.util.FSUtils.getVersion(FSUtils.java:152)
>>>>        at
>>>> org.apache.hadoop.hbase.util.FSUtils.checkVersion(FSUtils.java:173)
>>>>        at
>>>> org.apache.hadoop.hbase.master.MasterFileSystem.checkRootDir(MasterFileSystem.java:226)
>>>>        at
>>>> org.apache.hadoop.hbase.master.MasterFileSystem.createInitialFileSystemLayout(MasterFileSystem.java:104)
>>>>        at
>>>> org.apache.hadoop.hbase.master.MasterFileSystem.<init>(MasterFileSystem.java:89)
>>>>        at
>>>> org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:338)
>>>>        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:274)
>>>>
>>>> Any ideas where to look? I'm kinda at a loss here, since I'm fairly
>>>> certain the versions are all in sync. I'm able to browse HDFS in the
>>>> UI and copyToLocal the /hbase-app/hbase/hbase.version file without
>>>> problems.
>>>>
>>>> thanks,
>>>> Bill
>>>
>>>
>>>
>>> --
>>> Todd Lipcon
>>> Software Engineer, Cloudera
>>>
>>
>

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