https://issues.apache.org/bugzilla/show_bug.cgi?id=50282
Summary: Reference from
javax.security.auth.login.LoginContext.contextClassLoa
der initalized in static code block prevents an
undeployed Web application from being garbage
collected (similar to #49669)
Product: Tomcat 7
Version: 7.0.4
Platform: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: [email protected]
ReportedBy: [email protected]
The class javax.security.auth.login.LoginContext has a "contextClassLoader"
field that I believe is causing a similar problem as identified in bug #49669,
which is related to the class not being garbage collected even though the
application has been undeployed.
https://issues.apache.org/bugzilla/show_bug.cgi?id=49669
I was able to notice this by deploying a very simple spring-based webapp that
utilizes javax.security for authentication in which the LoginContext class is
used.
I then used YourKit profiler as specified in this writeup to find any lingering
classes without instances:
http://www.yourkit.com/docs/kb/class_loaders.jsp
The following class had the most instances (inside of a WebappClassLoader):
"contextClassLoader of javax.security.auth.login.Configuration [Class]"
This looks almost identical to bug #49669 with the only difference being that
the contextClassLoader field isn't static, however it is initialized in a
static code block. Thus, it looks like the solution for bug #49669 would solve
this problem as well.
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