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https://issues.apache.org/jira/browse/HBASE-8808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14162659#comment-14162659
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Andrew Purtell commented on HBASE-8808:
---------------------------------------

I've noticed at least with 0.98 when running tests roughly as suggested above ( 
{{mvn -DskipTests clean install && mvn clean package 
-Dhbase.skip-jacoco=false}} ), TestSplitLogManager and TestSplitLogWorker in 
hbase-server will fail due to what I presume is jacoco bytecode rewriting:
{noformat}
Results :

Tests in error: 
  testTaskErr(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z cannot be 
cast to java.util.concurrent.atomic.AtomicLong
  testMultipleResubmits(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  
testGetPreviousRecoveryMode(org.apache.hadoop.hbase.master.TestSplitLogManager):
 [Z cannot be cast to java.util.concurrent.atomic.AtomicLong
  testTaskResigned(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  testUnassignedOrphan(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  
testRecoveryRegionRemovedFromZK(org.apache.hadoop.hbase.master.TestSplitLogManager):
 [Z cannot be cast to java.util.concurrent.atomic.AtomicLong
  testWorkerCrash(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  testTaskDone(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z cannot 
be cast to java.util.concurrent.atomic.AtomicLong
  testEmptyLogDir(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  
testOrphanTaskAcquisition(org.apache.hadoop.hbase.master.TestSplitLogManager): 
[Z cannot be cast to java.util.concurrent.atomic.AtomicLong
  testUnassignedTimeout(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  testLogFilesAreArchived(org.apache.hadoop.hbase.master.TestSplitLogManager): 
[Z cannot be cast to java.util.concurrent.atomic.AtomicLong
  testTaskCreation(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  testDeadWorker(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z cannot 
be cast to java.util.concurrent.atomic.AtomicLong
  testRescanCleanup(org.apache.hadoop.hbase.master.TestSplitLogManager): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  testPreemptTask(org.apache.hadoop.hbase.regionserver.TestSplitLogWorker): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  
testAcquireMultiTasks(org.apache.hadoop.hbase.regionserver.TestSplitLogWorker): 
[Z cannot be cast to java.util.concurrent.atomic.AtomicLong
  
testAcquireTaskAtStartup(org.apache.hadoop.hbase.regionserver.TestSplitLogWorker):
 [Z cannot be cast to java.util.concurrent.atomic.AtomicLong
  
testAcquireMultiTasksByAvgTasksPerRS(org.apache.hadoop.hbase.regionserver.TestSplitLogWorker):
 [Z cannot be cast to java.util.concurrent.atomic.AtomicLong
  testRaceForTask(org.apache.hadoop.hbase.regionserver.TestSplitLogWorker): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong
  testMultipleTasks(org.apache.hadoop.hbase.regionserver.TestSplitLogWorker): 
[Z cannot be cast to java.util.concurrent.atomic.AtomicLong
  testRescan(org.apache.hadoop.hbase.regionserver.TestSplitLogWorker): [Z 
cannot be cast to java.util.concurrent.atomic.AtomicLong

Tests run: 1262, Failures: 0, Errors: 22, Skipped: 8
{noformat}

 Just me?

I'm now trying {{mvn -fn ...}} aka "fail never" to get beyond those failures.

> Use Jacoco to generate Unit Test coverage reports
> -------------------------------------------------
>
>                 Key: HBASE-8808
>                 URL: https://issues.apache.org/jira/browse/HBASE-8808
>             Project: HBase
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 0.89-fb
>            Reporter: Manukranth Kolloju
>            Assignee: Manukranth Kolloju
>            Priority: Trivial
>             Fix For: 2.0.0, 0.98.7, 0.99.1
>
>         Attachments: 0001-Including-Jacoco-plugin-to-get-test-coverage.patch, 
> 0001-Including-Jacoco-plugin-to-get-test-coverage.patch, 
> 0001-Including-Jacoco-plugin-to-get-test-coverage.patch, Screen Shot 
> 2013-06-25 at 11.35.30 AM.png
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> Enabling the code coverage tool jacoco in maven



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