Yoan Alvarez created PDFBOX-3555:
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Summary: FlateFilter.decode cause native memory leaks
Key: PDFBOX-3555
URL: https://issues.apache.org/jira/browse/PDFBOX-3555
Project: PDFBox
Issue Type: Bug
Affects Versions: 2.0.3
Environment: Debian wheezy 7.11 / oracle JDK 8 - 64 bit / pdfbox 2.0.3
Reporter: Yoan Alvarez
The
[FlateFilter.decode|https://github.com/apache/pdfbox/blob/trunk/pdfbox/src/main/java/org/apache/pdfbox/filter/FlateFilter.java#L45]
method calls the private method
[FlateFilter.decompress|https://github.com/apache/pdfbox/blob/trunk/pdfbox/src/main/java/org/apache/pdfbox/filter/FlateFilter.java#L89]
which instanciates a
[java.util.zip.Inflater|https://docs.oracle.com/javase/8/docs/api/java/util/zip/Inflater.html].
But this method never calls the
[Inflater.end|https://docs.oracle.com/javase/8/docs/api/java/util/zip/Inflater.html#end--]
method so I think the native memory allocated by the Inflater is never
released.
By consequence, the java process memory size keeps growing over time.
The simplest way we found to fix this is to call the
[Inflater.end|https://docs.oracle.com/javase/8/docs/api/java/util/zip/Inflater.html#end--]
when the inflater has done its job and is not used anymore at the end of
[FlateFilter.decompress|https://github.com/apache/pdfbox/blob/trunk/pdfbox/src/main/java/org/apache/pdfbox/filter/FlateFilter.java#L136].
With this fix, the java process memory size remains stable over time.
Just ask me if more details are needed.
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