1) Has java 5 given us any new way to attach to a running app and
see the threads or does the foresight of applying jdb startup
parameters to each instance still apply with a view to using jdb
*if* you get a frozen app as outlined in WO wiki....
http://en.wikibooks.org/wiki/Programming:WebObjects/
Web_Applications/Deployment/Debugging_Frozen_Deployed_Instances
JProfiler can do this, but kill -QUIT will give you a snapshot.
2) I understood that wotaskd would kill and restart a deadlocked
unresponsive instance automatically ..... but it did not do it today?
It does not do this ... It will restart a STOPPED instance
automatically. But a deadlocked instance is not going anywhere on
its own.
3) Besides ERXObjectStoreCoordinator for broadcasting EOF stack
changes, what other reliable synchronization options are available?
I have not heard of any of the synchronization options being
reliable. It's why I started work on the multicast one, because
every other one had a pretty spotty sounding history in the mailing
list archives.
However, over the past month or so I have done many 500+ freaking-out-
click-crazy-concurrent-user-reading-and-writing load tests on top of
the ERX stack synchronizer, both multicast/remote and multistack
single-instance without a single deadlock. Anything's possible, but
I have not seen it happen under some pretty NASTY conditions.
ms
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