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From "Shai Erera (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LUCENE-3258) File leak when IOException occurs during index optimization.
Date Wed, 29 Jun 2011 19:10:28 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-3258?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Shai Erera resolved LUCENE-3258.
--------------------------------

       Resolution: Won't Fix
    Fix Version/s:     (was: 3.0.3)

These issues were fixed in LUCENE-3147 and have been released w/ Lucene 3.2.0. I don't think
we should backport those fixes to the 3.0.x branch, nor do we have the test-framework in place
there to test them.

> File leak when IOException occurs during index optimization.
> ------------------------------------------------------------
>
>                 Key: LUCENE-3258
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3258
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: core/index
>    Affects Versions: 3.0.3
>         Environment: SUSE Linux 11, Java 6
>            Reporter: Nick Kirsch
>
> I am not sure if this issue requires a fix due to the nature of its occurrence, or if
it exists in other versions of Lucene.
> I am using Lucene Java 3.0.3 on a SUSE Linux machine with Java 6 and have noticed there
are a number of file handles that are not being released from my java application. There are
IOExceptions in my log regarding disk full, which causes a merge and the optimization to fail.
The index is not currupt upon encountering the IOException. I am using CFS for my index format,
so 3X my largest index size during optimization certainly consumes all of my available disk.

> I realize that I need to add more disk space to my machine, but I investigated how to
clean up the leaking file handles. After failing to find a misuse of Lucene's IndexWriter
in the code I have wrapping Lucene, I did a quick search for close() being invoked in the
Lucene Jave source code. I found a number of source files that attempt to close more than
one object within the same close() method. I think a try/catch should be put around each of
these close() attempts to avoid skipping a subsequent closes. The catch may be able to ignore
a caught exception to avoid masking the original exception like done in SimpleFSDirectory.close().
> Locations in Lucene Java source where I suggest a try/catch should be used:
> - org.apache.lucene.index.FormatPostingFieldsWriter.finish()
> - org.apache.lucene.index.TermInfosWriter.close()
> - org.apache.lucene.index.SegmentTermPositions.close()
> - org.apache.lucene.index.SegmentMergeInfo.close()
> - org.apache.lucene.index.SegmentMerger.mergeTerms() (The finally block)
> - org.apache.lucene.index.DirectoryReader.close()
> - org.apache.lucene.index.FieldsReader.close()
> - org.apache.lucene.index.MultiLevelSkipListReader.close()
> - org.apache.lucene.index.MultipleTermPositions.close()
> - org.apache.lucene.index.SegmentMergeQueue.close()
> - org.apache.lucene.index.SegmentMergeDocs.close()
> - org.apache.lucene.index.TermInfosReader.close()

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