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Posted to common-dev@hadoop.apache.org by "Robert Chansler (JIRA)" <ji...@apache.org> on 2008/03/28 01:14:24 UTC
[jira] Assigned: (HADOOP-1911) infinite loop in dfs -cat command.
[ https://issues.apache.org/jira/browse/HADOOP-1911?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Chansler reassigned HADOOP-1911:
---------------------------------------
Assignee: Chris Douglas
> infinite loop in dfs -cat command.
> ----------------------------------
>
> Key: HADOOP-1911
> URL: https://issues.apache.org/jira/browse/HADOOP-1911
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.13.1, 0.14.3
> Reporter: Koji Noguchi
> Assignee: Chris Douglas
> Priority: Blocker
> Fix For: 0.17.0
>
>
> [knoguchi]$ hadoop dfs -cat fileA
> 07/09/13 17:36:02 INFO fs.DFSClient: Could not obtain block 0 from any node:
> java.io.IOException: No live nodes contain current block
> 07/09/13 17:36:20 INFO fs.DFSClient: Could not obtain block 0 from any node:
> java.io.IOException: No live nodes contain current block
> [repeats forever]
> Setting one of the Debug statement to Warn, it kept on showing
> {noformat}
> WARN org.apache.hadoop.fs.DFSClient: Failed to connect
> to /99.99.999.9 :11111:java.io.IOException: Recorded block size is 7496, but
> datanode reports size of 0
> at org.apache.hadoop.dfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:690)
> at org.apache.hadoop.dfs.DFSClient$DFSInputStream.read(DFSClient.java:771)
> at org.apache.hadoop.fs.FSDataInputStream$PositionCache.read(FSDataInputStream.java:41)
> at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
> at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
> at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
> at java.io.DataInputStream.readFully(DataInputStream.java:178)
> at java.io.DataInputStream.readFully(DataInputStream.java:152)
> at org.apache.hadoop.fs.ChecksumFileSystem$FSInputChecker.(ChecksumFileSystem.java:123)
> at org.apache.hadoop.fs.ChecksumFileSystem.open(ChecksumFileSystem.java:340)
> at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:259)
> at org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.map(CopyFiles.java:466)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:186)
> at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1707)
> {noformat}
> Turns out fileA was corrupted. Fsck showed crc file of 7496 bytes, but when I searched for the blocks on each node, 3 replicas were all size 0.
> Not sure how it got corrupted, but it would be nice if the dfs command fail instead of getting into an infinite loop.
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