https://issues.apache.org/bugzilla/show_bug.cgi?id=46549
Summary: Leak caused by org.apache.tomcat.util.digester.Digester
not releasing the XMLReader
Product: Tomcat 5
Version: 5.5.26
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Unknown
AssignedTo: [email protected]
ReportedBy: [email protected]
If your webapp comes with Xerces-J (for instance: xercesImpl-2.8.1.jar is in
WEB-INF/lib), when org.apache.tomcat.util.digester.Digester.getXMLReader() is
executed during webapp start (to read the TLDs) the XMLReader saved into reader
field is an instance of class loaded by the webapp class loader (in fact,
org.apache.tomcat.util.digester.Digester.getFactory() causes the JDK to find a
factory implementation in xercesImpl-2.8.1.jar, which in turn returns a Parser
implementation from xercesImpl-2.8.1.jar).
However, when you stop your webapp the reader field of the Digester is not
reset, holding a strong reference that prevents the webapp class loader from
being garbage collected.
This is something very similar to what is happening in bug #46221.
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