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https://issues.apache.org/jira/browse/SOLR-2886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13157238#comment-13157238
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Tricia Williams commented on SOLR-2886:
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Some further bug tracing shows that pdfbox' RandomAccessBuffer is responsible
for the Out of Memory error. It creates a new larger buffer and then copies
the existing buffer into the new buffer. There are no checks to see if the
space is available to create a new larger buffer. Use of a RandomAccessBuffer
was introduced with PDFBOX-948 at revision 1072678 on Feb 20, 2011 and in the
pdfbox 1.5 and 1.6 releases, hence tika 0.10 in revision 1080162 on Mar 10,
2011 and revision 1171497 on Sep 16, 2011. Moving my DIH workflow to another
machine with more memory available is able to run to completion.
It appears that I am the victim of the caviate stated in PDFBOX-948:
For normal sized PDFs files, the in-memory implementation RandomAccessBuffer
should not increase the memory usage too much, while providing faster IO as all
access operations are only memory copies.
Therefore, please consider switching the default to in-memory scratch buffers.
Users with very large files can still pass a temporary directory.
Now to track down how to detect "large files" and use a temporary directory
instead. This may turn out to be a TIKA issue rather than Solr.
> Out of Memory Error with DIH and TikaEntityProcessor
> ----------------------------------------------------
>
> Key: SOLR-2886
> URL: https://issues.apache.org/jira/browse/SOLR-2886
> Project: Solr
> Issue Type: Bug
> Components: contrib - DataImportHandler, contrib - Solr Cell (Tika
> extraction)
> Affects Versions: 4.0
> Reporter: Tricia Williams
> Fix For: 4.0
>
>
> I've recently upgraded from apache-solr-4.0-2011-06-14_08-33-23.war to
> apache-solr-4.0-2011-10-14_08-56-59.war and then
> apache-solr-4.0-2011-10-30_09-00-00.war to index ~5300 pdfs, of various
> sizes, using the TikaEntityProcessor. My indexing would run to completion
> and was completely successful under the June build. The only error was
> readability of the fulltext in highlighting. This was fixed in Tika 0.10
> (TIKA-611). I chose to use the October 14 build of Solr because Tika 0.10
> had recently been included (SOLR-2372).
> On the same machine without changing any memory settings my initial problem
> is a Perm Gen error. Fine, I increase the PermGen space.
> I've set the "onError" parameter to "skip" for the TikaEntityProcessor. Now
> I get several (6)
> SEVERE: Exception thrown while getting data
> java.net.SocketTimeoutException: Read timed out
> SEVERE: Exception in entity :
> tika:org.apache.solr.handler.dataimport.DataImport
> HandlerException: Exception in invoking url <url removed> # 2975
> pairs. And after ~3881 documents, with auto commit set unreasonably
> frequently I consistently get an Out of Memory Error
> SEVERE: Exception while processing: f document :
> null:org.apache.solr.handler.dataimport.DataImportHandlerException:
> java.lang.OutOfMemoryError: Java heap space
> The stack trace points to
> org.apache.pdfbox.io.RandomAccessBuffer.expandBuffer(RandomAccessBuffer.java:151)
> and
> org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:718).
> The October 30 build performs identically.
> Funny thing is that monitoring via JConsole doesn't reveal any memory issues.
> Because the out of Memory error did not occur in June, this leads me to
> believe that a bug has been introduced to the code since then.
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