Hi,
during work on session serialization my colleagues run into
a problem with the startup order of the session manager vs
listeners/filters.
During startup the session manager is started before the
listeners and filters. This implies that objects that
depend on parts of the application can not be properly
deserialized. (Apparently, a re-write to remove such
dependencies is not feasible in our case.)
Further this behaviour is inconsistent with the reload
behaviour, which was previously changed due to
http://issues.apache.org/bugzilla/show_bug.cgi?id=3733.
We have patched this behaviour (see attachment) to start
listeners/filters immediately _befor_ the session manager.
This patch solves our problem and does not seem to cause any
new issues with our application. However, due to the
triviality of the patch, we have not made a thorough
examination of the workings of o.a.c.core.StandardContext.
Also, the patch is focused on one specific issue. It does
not (unless by coincidence) ensure consistency in the
reload/start behaviours.
The patch is against 4.1.16, since 4.1.17 was released after
the patch was written.
Sincerely,
Michael Eriksson
--- StandardContext.java 2002-12-16 11:31:45.000000000 +0100
+++
+jakarta-tomcat-4.1.16-src/catalina/src/share/org/apache/catalina/core/StandardContext.java
+ 2002-12-16 11:33:47.000000000 +0100
@@ -3566,15 +3566,7 @@
// Notify our interested LifecycleListeners
lifecycle.fireLifecycleEvent(START_EVENT, null);
- // Configure and call application event listeners and filters
- if (!listenerStart())
- ok = false;
- if (ok) {
- if (!filterStart())
- ok = false;
- }
-
- if (ok && (manager != null) && (manager instanceof Lifecycle))
+ if ((manager != null) && (manager instanceof Lifecycle))
((Lifecycle) manager).start();
} finally {
@@ -3601,6 +3593,16 @@
postWelcomeFiles();
}
+ // Configure and call application event listeners and filters
+ if (ok) {
+ if (!listenerStart())
+ ok = false;
+ }
+ if (ok) {
+ if (!filterStart())
+ ok = false;
+ }
+
// Load and initialize all "load on startup" servlets
if (ok)
loadOnStartup(findChildren());
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