After yet another journey down into the depths of the cache, it now appears that the
problem lies with the combination of Java 1.3, TreeCache, and boolean attributes.
Basically, once I downgraded the Win2K server to 1.3, it began exhibiting the same
behaviour as the HP/UX server (java.lang.ClassNotFoundException: No ClassLoaders found
for: boolean reported by JavaGroups).
More specifically, this error (so far) only seems to occur when setting a boolean
attribute on a tree node. I tried using both styles of the put() method:
cache.put("/test/mynode", "testAttribute", new Boolean(true));
and
HashMap testMap = new HashMap();
| testMap.put("testAttribute", new Boolean(true));
| cache.put("/test/mynode", testMap);
In both cases, the classloader error was reported.
In order to check my sanity, I moved the Win2K server back to Java 1.4 and ran the
tests again. Sure enough, the Win2K server no longer reported the classloader error.
So...to sum things up: it appears that when a JBoss server instance running Java 1.3
and TreeCache receives a replication transaction from another server that involves
replication of a boolean attribute, it fails. If the recipient server is running Java
1.4, the replication is successful.
I have a request into our HP/UX admin to upgrade the HP/UX server to 1.4 (which will
probably not occur until Monday or Tuesday of next week). Once this upgrade is
complete, I'll run the tests again to verify my suspicions about Java 1.3 and the
replication of booleans in TreeCache.
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