[ https://issues.apache.org/jira/browse/HDFS-872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12802520#action_12802520 ]
Hairong Kuang commented on HDFS-872: ------------------------------------ Todd, could you please take a look at the findug error? [exec] -1 overall. [exec] [exec] +1 @author. The patch does not contain any @author tags. [exec] [exec] +1 tests included. The patch appears to include 3 new or modified tests. [exec] [exec] +1 javadoc. The javadoc tool did not generate any warning messages. [exec] [exec] +1 javac. The applied patch does not increase the total number of javac compiler warnings. [exec] [exec] -1 findbugs. The patch appears to introduce 1 new Findbugs warnings. [exec] [exec] +1 Eclipse classpath. The patch retains Eclipse classpath integrity. Ant test-core was passed. > DFSClient 0.20.1 is incompatible with HDFS 0.20.2 > ------------------------------------------------- > > Key: HDFS-872 > URL: https://issues.apache.org/jira/browse/HDFS-872 > Project: Hadoop HDFS > Issue Type: Bug > Components: data-node, hdfs client > Affects Versions: 0.20.1, 0.20.2 > Reporter: Bassam Tabbara > Assignee: Todd Lipcon > Fix For: 0.20.2 > > Attachments: hdfs-793-branch20.txt, hdfs-793-branch20.txt, > hdfs-872.txt > > > After upgrading to that latest HDFS 0.20.2 (r896310 from > /branches/branch-0.20), old DFS clients (0.20.1) seem to not work anymore. > HBase uses the 0.20.1 hadoop core jars and the HBase master will no longer > startup. Here is the exception from the HBase master log: > {code} > 2010-01-06 09:59:46,762 WARN org.apache.hadoop.hdfs.DFSClient: DFS Read: > java.io.IOException: Could not obtain block: blk_338051 > 2596555557728_1002 file=/hbase/hbase.version > at > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:1788) > at > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1616) > at > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1743) > at > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1673) > 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:189) > at org.apache.hadoop.hbase.util.FSUtils.checkVersion(FSUtils.java:208) > at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:208) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at org.apache.hadoop.hbase.master.HMaster.doMain(HMaster.java:1241) > at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:1282) > 2010-01-06 09:59:46,763 FATAL org.apache.hadoop.hbase.master.HMaster: Not > starting HMaster because: > java.io.IOException: Could not obtain block: blk_3380512596555557728_1002 > file=/hbase/hbase.version > at > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:1788) > at > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1616) > at > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1743) > at > org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1673) > 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:189) > at org.apache.hadoop.hbase.util.FSUtils.checkVersion(FSUtils.java:208) > at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:208) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) > at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > at org.apache.hadoop.hbase.master.HMaster.doMain(HMaster.java:1241) > at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:1282) > {code} > If I switch the hadoop jars in the hbase/lib directory with 0.20.2 version it > works well, which what led me to open this bug here and not in the HBASE > project. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.