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Posted to common-issues@hadoop.apache.org by "Alexander Bondar (JIRA)" <ji...@apache.org> on 2010/06/11 16:02:16 UTC
[jira] Updated: (HADOOP-6820) RunJar fails executing thousands JARs
within single JVM with error "Too many open files"
[ https://issues.apache.org/jira/browse/HADOOP-6820?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alexander Bondar updated HADOOP-6820:
-------------------------------------
Attachment: HADOOP-6820.patch
RunJar unit-test and bug-fix for trunk
> RunJar fails executing thousands JARs within single JVM with error "Too many open files"
> ----------------------------------------------------------------------------------------
>
> Key: HADOOP-6820
> URL: https://issues.apache.org/jira/browse/HADOOP-6820
> Project: Hadoop Common
> Issue Type: Bug
> Components: util
> Affects Versions: 0.20.2
> Environment: OS:Linux, Linux-user limited by maximum number of open file descriptors (for example: ulimit -n shows 1024)
> Reporter: Alexander Bondar
> Priority: Minor
> Attachments: HADOOP-6820.patch
>
>
> According to Sun JVM (up to 7) bug http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4167874 - The JarFile objects created by sun.net.www.protocol.jar.JarFileFactory never get garbage collected, even if the classloader that loaded them goes away.
> So, if linux-user has limitation on maximum number of open file descriptors (for example: ulimit -n shows 1024) and performs RunJar.main(...) over thousands of JARs that include other nested JARs (also loaded by ClassLoader) within single JVM, RunJar.main(...) throws following exception: java.lang.RuntimeException: java.io.FileNotFoundException: /some-file.txt (Too many open files)
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