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https://issues.apache.org/jira/browse/HBASE-5290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13196399#comment-13196399
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Hadoop QA commented on HBASE-5290:
----------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12512451/HBASE-5290v2.patch
against trunk revision .
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
-1 javadoc. The javadoc tool appears to have generated -140 warning
messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
-1 findbugs. The patch appears to introduce 158 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 unit tests:
org.apache.hadoop.hbase.mapreduce.TestHFileOutputFormat
org.apache.hadoop.hbase.mapred.TestTableMapReduce
org.apache.hadoop.hbase.mapreduce.TestImportTsv
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/874//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/874//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/874//console
This message is automatically generated.
> [FindBugs] Synchronization on boxed primitive
> ---------------------------------------------
>
> Key: HBASE-5290
> URL: https://issues.apache.org/jira/browse/HBASE-5290
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.0
> Reporter: Liyin Tang
> Assignee: Liyin Tang
> Priority: Minor
> Attachments: HBASE-5290.patch, HBASE-5290.patch, HBASE-5290v2.patch
>
>
> This bug is reported by the findBugs tool, which is a static analysis tool.
> Bug: Synchronization on Integer in
> org.apache.hadoop.hbase.regionserver.compactions.CompactSelection.emptyFileList()
> The code synchronizes on a boxed primitive constant, such as an Integer.
> {code}
> private static Integer count = 0;
> ...
> synchronized(count) {
> count++;
> }
> ...
> {code}
> Since Integer objects can be cached and shared, this code could be
> synchronizing on the same object as other, unrelated code, leading to
> unresponsiveness and possible deadlock
> See CERT CON08-J. Do not synchronize on objects that may be reused for more
> information.
> Confidence: Normal, Rank: Troubling (14)
> Pattern: DL_SYNCHRONIZATION_ON_BOXED_PRIMITIVE
> Type: DL, Category: MT_CORRECTNESS (Multithreaded correctness)
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