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From Bill Graham <billgra...@gmail.com>
Subject HBase fails to start - DataXceiver Version Mismatch
Date Tue, 11 Jan 2011 05:45:37 GMT
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

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