https://issues.apache.org/bugzilla/show_bug.cgi?id=50486
Summary: Memoryleak - org.apache.log4j.helpers.ThreadLocalMap
Product: Log4j
Version: 1.2
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Tomcat 7 log's this when doing a shutdown:
The web application [/MyApp] created a ThreadLocal with key of type
[org.apache.log4j.helpers.ThreadLocalMap] (value
[org.apache.log4j.helpers.threadlocal...@1d3e069]) and a value of type
[java.util.Hashtable] (value [{}]) but failed to remove it when the web
application was stopped. This is very likely to create a memory leak.
I'm using it the following way:
try {
if (MDC.get(..) == null) {
MDC.put(.., ...);
}
....
} finally {
MDC.remove(...);
}
After taking a quick look at the source of log4j i think the problem is that
remove only removes the entry from the HashTable but does not call remove on
the ThreadLocal itself.
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