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https://issues.apache.org/jira/browse/IVY-1305?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen Evanchik updated IVY-1305:
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Attachment: file_descriptor_leak.patch
> File descriptor leak in OSGI repo core while running buildobr Ant Task
> ----------------------------------------------------------------------
>
> Key: IVY-1305
> URL: https://issues.apache.org/jira/browse/IVY-1305
> Project: Ivy
> Issue Type: Bug
> Components: Ant, Core
> Affects Versions: trunk
> Reporter: Stephen Evanchik
> Attachments: file_descriptor_leak.patch
>
>
> I have Ivy declared as an extension to the Eclipse Ant infrastructure. This
> means that I can execute Ant from inside Eclipse using the AntRunner class.
> When Ant is invoked it will share the same JVM as the main Eclipse install.
> This makes the main Eclipse install susceptible to problems in any Ant Task
> including memory and file descriptor leaks.
> According to my superficial understanding of the OSGI repo code in Ivy it
> appears that there is a FSIterable class which iterates over a filesystem
> looking for JARs/OSGi bundles. This list is built so that it can be traversed
> via an Iterator: FSManifestIterator.
> In that Iterator the Iterator.hasNext() method instantiates a JarInputStream
> but does not close it. When JarInputStream is allocated via the
> FileInputStream a FileDescriptor is allocated. FileDescriptors are often a
> limited resource on Linux systems. In my case Fedora 15 I am limited to 1024
> per-process. I could easily increase the limit but then users of my Eclipse
> plugin would also have to do that which is not desirable.
> Additionally, the lack of an call to JarInputStream.close() means the cleanup
> is left to the finalizer which is not guaranteed to run in a predictable
> manner. Finally, there have been several problems with InflaterInputStreams
> polluting the shared Inflater pool when relying on finalizers cleaning up
> InputStreams (See here for an example:
> https://bugs.eclipse.org/bugs/show_bug.cgi?id=193269)
> Given all this I think it better to practively close the JarInputStream after
> it is not needed.
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