[ http://issues.apache.org/jira/browse/HADOOP-258?page=comments#action_12439844 ] Chris Schneider commented on HADOOP-258: ----------------------------------------
Just FYI, I recently integrated hadoop 0.5 into my copy of the source, rebuit and installed. I ran into similar "Could not obtain block" errors until I realized that I hadn't deployed the (new in hadoop 0.5) .../webapps/datanode/ servlet on my cluster. > Cannot obtain block errors > -------------------------- > > Key: HADOOP-258 > URL: http://issues.apache.org/jira/browse/HADOOP-258 > Project: Hadoop > Issue Type: Bug > Components: dfs > Affects Versions: 0.3.0 > Reporter: Owen O'Malley > Assigned To: Sameer Paranjpye > Fix For: 0.6.0 > > > I've been seeing a lot of errors from dfs for the last couple days. The > exception that I see is: > java.io.IOException: Could not obtain block: blk_2867431916903738534 > file=/user/oom/big-rand/part000271 offset=0 at > org.apache.hadoop.dfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:532) > at org.apache.hadoop.dfs.DFSClient$DFSInputStream.read(DFSClient.java:641) > at > org.apache.hadoop.fs.FSDataInputStream$Checker.read(FSDataInputStream.java:83) > at > org.apache.hadoop.fs.FSDataInputStream$PositionCache.read(FSDataInputStream.java:158) > at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at > java.io.BufferedInputStream.read1(BufferedInputStream.java:256) at > java.io.BufferedInputStream.read(BufferedInputStream.java:313) at > java.io.DataInputStream.readFully(DataInputStream.java:176) at > java.io.DataInputStream.readFully(DataInputStream.java:152) at > org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:264) at > org.apache.hadoop.io.SequenceFile$Reader.(SequenceFile.java:248) at > org.apache.hadoop.io.SequenceFile$Reader.(SequenceFile.java:238) at > org.apache.hadoop.mapred.SequenceFileRecordReader.(SequenceFileRecordReader.java:36) > at > org.apache.hadoop.mapred.SequenceFileInputFormat.getRecordReader(SequenceFileInputFormat.java:53) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:105) at > org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:866) > I haven't had my fingers in that code recently, does it ring any bells for > anyone? -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
