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From "Esteban Gutierrez (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-9003) TableMapReduceUtil should not rely on org.apache.hadoop.util.JarFinder#getJar
Date Fri, 19 Jul 2013 20:26:50 GMT
Esteban Gutierrez created HBASE-9003:
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             Summary: TableMapReduceUtil should not rely on org.apache.hadoop.util.JarFinder#getJar
                 Key: HBASE-9003
                 URL: https://issues.apache.org/jira/browse/HBASE-9003
             Project: HBase
          Issue Type: Bug
          Components: mapreduce
    Affects Versions: 0.94.9, 0.95.1, 0.92.2
            Reporter: Esteban Gutierrez


This is the problem: {{TableMapReduceUtil#addDependencyJars}} relies on {{org.apache.hadoop.util.JarFinder}}
if available to call {{getJar()}}. However {{getJar()}} uses File.createTempFile() to create
a temporary file under {{hadoop.tmp.dir}}{{/target/test-dir}}. Due HADOOP-9737 the created
jar and its content is not purged after the JVM is destroyed. Since most configurations point
{{hadoop.tmp.dir}} under {{/tmp}} the generated jar files get purged by {{tmpwatch}} or a
similar tool, but boxes that have {{hadoop.tmp.dir}} pointing to a different location not
monitored by {{tmpwatch}} will pile up a collection of jars causing all kind of issues. Since
{{JarFinder#getJar}} is not a public API from Hadoop (see [~tucu00] comment on HADOOP-9737)
we shouldn't use that as part of {{TableMapReduceUtil}} in order to avoid this kind of issues.

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