https://issues.apache.org/bugzilla/show_bug.cgi?id=50228
Summary: PermGen leak when calling JspFragment.invoke() with a
custom Writer
Product: Tomcat 6
Version: 6.0.29
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: [email protected]
ReportedBy: [email protected]
Created an attachment (id=26266)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=26266)
writerleak.war - Reproduces the leak
We have a web application that contains a SimpleTag that calls
JspFragment.invoke(writer) with a custom java.io.Writer (actually, a NullWriter
from commons-io).
When this application is undeployed, it still remains in memory, as reported by
the "Find leaks" tool in the manager webapp.
I am attaching a simple sample application that reproduces the issue.
To reproduce:
1. Deploy the app.
2. Open index.jsp
3. Undeploy the app.
4. "Find leaks" reports that the app is still in memory
Using the Eclipse MAT tool I can see that the leak is caused by
o.a.jasper.runtime.BodyContentImpl keeping a reference to the Writer,
while the BodyContentImpl instance is cached in some pool referenced by a
ThreadLocal.
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