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From Bill Graham <billgra...@gmail.com>
Subject Re: HBase fails to start - DataXceiver Version Mismatch
Date Tue, 11 Jan 2011 06:12:47 GMT
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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