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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5809) BlockPoolSliceScanner and high speed hdfs appending make datanode to drop into infinite loop
Date Sat, 31 May 2014 00:01:05 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14014399#comment-14014399
] 

Hadoop QA commented on HDFS-5809:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12647684/HDFS-5809.001.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.server.datanode.TestBPOfferService

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/7018//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/7018//console

This message is automatically generated.

> BlockPoolSliceScanner and high speed hdfs appending make datanode to drop into infinite
loop
> --------------------------------------------------------------------------------------------
>
>                 Key: HDFS-5809
>                 URL: https://issues.apache.org/jira/browse/HDFS-5809
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>    Affects Versions: 2.0.0-alpha
>         Environment: jdk1.6, centos6.4, 2.0.0-cdh4.5.0
>            Reporter: ikweesung
>            Assignee: Colin Patrick McCabe
>            Priority: Critical
>              Labels: blockpoolslicescanner, datanode, infinite-loop
>         Attachments: HDFS-5809.001.patch
>
>
> Hello, everyone.
> When hadoop cluster starts, BlockPoolSliceScanner start scanning the blocks in my cluster.
> Then, randomly one datanode drop into infinite loop as the log show, and finally all
datanodes drop into infinite loop.
> Every datanode just verify fail by one block. 
> When i check the fail block like this : hadoop fsck / -files -blocks | grep blk_1223474551535936089_4702249,
no hdfs file contains the block.
> It seems that in while block of BlockPoolSliceScanner's scan method drop into infinite
loop .
> BlockPoolSliceScanner: 650
> while (datanode.shouldRun
> && !datanode.blockScanner.blockScannerThread.isInterrupted()
> && datanode.isBPServiceAlive(blockPoolId)) { ....
> The log finally printed in method verifyBlock(BlockPoolSliceScanner:453).
> Please excuse my poor English.
> -------------------------------------------------------------------------------------------------------------------------------------------------
> LOG: 
> 2014-01-21 18:36:50,582 INFO org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner:
Verification failed for BP-1040548460-58.229.158.13-1385606058039:blk_6833233229840997944_4702634
- may be due to race with write
> 2014-01-21 18:36:50,582 INFO org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner:
Verification failed for BP-1040548460-58.229.158.13-1385606058039:blk_6833233229840997944_4702634
- may be due to race with write
> 2014-01-21 18:36:50,582 INFO org.apache.hadoop.hdfs.server.datanode.BlockPoolSliceScanner:
Verification failed for BP-1040548460-58.229.158.13-1385606058039:blk_6833233229840997944_4702634
- may be due to race with write



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