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https://issues.apache.org/jira/browse/HDFS-925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12974070#action_12974070
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Hadoop QA commented on HDFS-925:
--------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12435708/HDFS-925.patch
against trunk revision 1051669.
+1 @author. The patch does not contain any @author tags.
-1 tests included. The patch doesn't appear to include any new or modified
tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
-1 core tests. The patch failed these core unit tests:
org.apache.hadoop.hdfs.server.balancer.TestBalancer
org.apache.hadoop.hdfs.server.namenode.TestStorageRestore
org.apache.hadoop.hdfs.TestHDFSTrash
-1 contrib tests. The patch failed contrib unit tests.
+1 system test framework. The patch passed system test framework compile.
Test results:
https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/32//testReport/
Findbugs warnings:
https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/32//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://hudson.apache.org/hudson/job/PreCommit-HDFS-Build/32//console
This message is automatically generated.
> Make it harder to accidentally close a shared DFSClient
> -------------------------------------------------------
>
> Key: HDFS-925
> URL: https://issues.apache.org/jira/browse/HDFS-925
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs client
> Affects Versions: 0.21.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Fix For: 0.22.0
>
> Attachments: HADOOP-5933.patch, HADOOP-5933.patch, HDFS-925.patch
>
>
> Every so often I get stack traces telling me that DFSClient is closed,
> usually in {{org.apache.hadoop.hdfs.DFSClient.checkOpen() }} . The root cause
> of this is usually that one thread has closed a shared fsclient while another
> thread still has a reference to it. If the other thread then asks for a new
> client it will get one -and the cache repopulated- but if has one already,
> then I get to see a stack trace.
> It's effectively a race condition between clients in different threads.
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