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http://issues.apache.org/bugzilla/show_bug.cgi?id=41682
Summary: ClassCastException with BackupManager + debug logging
Product: Tomcat 6
Version: 6.0.7
Platform: Other
OS/Version: other
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: tomcat-dev@jakarta.apache.org
ReportedBy: gjohnson@alpineaccess.com
(Still happening in 6.0.9, though that isn't an option in Bugzilla)
If I use the BackupManager for session replication AND turn on debug logging, I
get this exception when I try to invalidate the session:
java.lang.ClassCastException: org.apache.catalina.ha.session.BackupManager
cannot be cast to org.apache.catalina.ha.session.DeltaManager
at org.apache.catalina.ha.session.DeltaSession.expire(DeltaSession.java:361)
at org.apache.catalina.ha.session.DeltaSession.expire(DeltaSession.java:352)
at org.apache.catalina.session.StandardSession.expire(StandardSession.java:660)
at
org.apache.catalina.session.StandardSession.invalidate(StandardSession.java:1112)
at
org.apache.catalina.session.StandardSessionFacade.invalidate(StandardSessionFacade.java:150)
The bug is easy to find in the source. If debug logging is enabled, it tries to
cast manager to DeltaManager without an instanceof, even though it is doing an
instanceof immediately after:
public void expire(boolean notify, boolean notifyCluster) {
String expiredId = getIdInternal();
super.expire(notify);
if (notifyCluster) {
if (log.isDebugEnabled())
log.debug(sm.getString("deltaSession.notifying",
((DeltaManager)manager).getName(),
new Boolean(isPrimarySession()),
expiredId));
if ( manager instanceof DeltaManager ) {
( (DeltaManager) manager).sessionExpired(expiredId);
}
}
}
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