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https://issues.apache.org/jira/browse/EXLBR-32?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Carsten Ziegeler reassigned EXLBR-32:
-------------------------------------
Assignee: Carsten Ziegeler
> ResourceSource.getInfos() leaves URLConnection open, resulting in 'too may
> open files' condition
> ------------------------------------------------------------------------------------------------
>
> Key: EXLBR-32
> URL: https://issues.apache.org/jira/browse/EXLBR-32
> Project: Excalibur Components
> Issue Type: Bug
> Components: SourceResolver
> Affects Versions: 2.2, 2.1
> Environment: Sun Solaris 5.9
> JDK 1.4
> Cocoon 2.1.8
> Reporter: Ellis Pritchard
> Assigned To: Carsten Ziegeler
>
> org.apache.excalibur.source.impl.ResourceSource#getInfos() opens a
> URLConnection [line 79] to obtain information about the resource, however, it
> does not cause this connection to be closed (i.e. call getInputStream() and
> then close() that), thus the resulting file-descriptor will only be closed
> when the garbage collector collects the URLConnection object.
> Quote from java.net.URLConnection javadoc:
> "Calling the close() methods on the InputStream or OutputStream of an
> URLConnection after a request may free network resources associated with this
> instance, unless particular protocol specifications specify different
> behaviours for it."
> On a high-load system, which is accessing resources in jars frequently (even
> if only as a side-effect of calling getValidity()), this may result in all
> available file-descriptors being used within a short period, and because GC
> is not kicked off when a process runs out of file-descriptors, this can
> result in a DoS.
> This problem has occured on a live system running Apache Cocoon 2.1.8.
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