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Date: Thu, 21 Jun 2007 05:21:29 -0700 (PDT)
From: "Hudson (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Commented: (HADOOP-1505) HADOOP-1093 adds INFO-level logging
 of stacktrace java.lang.Exception...
 ZlibFactory.getZlibCompressor(ZlibFactory.java:81)
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    [ https://issues.apache.org/jira/browse/HADOOP-1505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12506873 ] 

Hudson commented on HADOOP-1505:
--------------------------------

Integrated in Hadoop-Nightly #131 (See [http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Nightly/131/])

> HADOOP-1093 adds INFO-level logging of stacktrace java.lang.Exception... ZlibFactory.getZlibCompressor(ZlibFactory.java:81)
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1505
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1505
>             Project: Hadoop
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: stack
>             Fix For: 0.14.0
>
>         Attachments: zlibfactory-v2.patch, zlibfactory.patch
>
>
> This change: 
> + 52. HADOOP-1193.  Pool allocation of compression codecs.  This
> +     eliminates a memory leak that could cause OutOfMemoryException,
> +     and also substantially improves performance.
> +     (Arun C Murthy via cutting)
> Added this to logs:
> {code}
> 07/06/19 12:18:58 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
> 07/06/19 12:18:58 INFO zlib.ZlibFactory: Creating a new ZlibCompressor
> java.lang.Exception
> 	at org.apache.hadoop.io.compress.zlib.ZlibFactory.getZlibCompressor(ZlibFactory.java:81)
> 	at org.apache.hadoop.io.compress.DefaultCodec.createCompressor(DefaultCodec.java:59)
> 	at org.apache.hadoop.io.SequenceFile$Writer.init(SequenceFile.java:740)
> 	at org.apache.hadoop.io.SequenceFile$RecordCompressWriter.<init>(SequenceFile.java:863)
> 	at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:136)
> 	at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:112)
> 	at org.apache.hadoop.hbase.HLog.rollWriter(HLog.java:227)
> 	at org.apache.hadoop.hbase.HLog.<init>(HLog.java:172)
> 	at org.apache.hadoop.hbase.AbstractMergeTestBase.createNewHRegion(AbstractMergeTestBase.java:137)
> 	at org.apache.hadoop.hbase.AbstractMergeTestBase.createAregion(AbstractMergeTestBase.java:104)
> 	at org.apache.hadoop.hbase.AbstractMergeTestBase.setUp(AbstractMergeTestBase.java:72)
> 	at junit.framework.TestCase.runBare(TestCase.java:125)
> 	at junit.framework.TestResult$1.protect(TestResult.java:106)
> 	at junit.framework.TestResult.runProtected(TestResult.java:124)
> 	at junit.framework.TestResult.run(TestResult.java:109)
> 	at junit.framework.TestCase.run(TestCase.java:118)
> 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
> 	at junit.framework.TestSuite.run(TestSuite.java:203)
> 	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)
> 	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
> 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
> {code}
> This seems to be culprit code:
> {code}
>   public static Compressor getZlibCompressor() {
>     LOG.info("Creating a new ZlibCompressor");
>     try {
>       throw new Exception();
>     } catch (Exception e) {
>       e.printStackTrace();
>     }
>     return (nativeZlibLoaded) ? 
>       new ZlibCompressor() : new BuiltInZlibDeflater(); 
>   }
> {code}

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