On Aug 4, 2009, at 9:32 AM, Mr. Frank Cobia wrote:
I have turned on direct connection to all the instances of the
apps and there is one that does not respond.
Which is why you are getting that message, however misleading the
text of the message may be.
I did indeed discover that the problem was in the app. When one
instance of my app hangs, JavaMonitor says that wotaskd is hung and
all kinds of bad things happen. Either the apache adaptor does not
redirect to a functioning instance or if it does, it does so after a
long pause.
How long? The default is 15 seconds. If you have multiple hung
instances, it could redirect to one of them.
Is there some reason that JavaMonitor/wotaskd/Apache Adptor can not
deal correctly with a hung instance? Is there anything I can do to
make it behave better?
Define better. It deals with it fairly well, given that it can only
assume what some symptoms might mean.
Also, I have to turn direct connect off to be able to do the refuse
new sessions, so is there another way to figure out which app is
hung so that it can be killed?
Look at the stack trace, like below. Also look for growing numbers of
worker threads. If you have more than 16, you probably have a problem.
Chuck
Get a thread dump:
http://www.gvcsitemaker.com/gvc.webobjects/faq&mode=single&recordID=41413
I did run jstack and it does appear that some threaded code in my
app is deadlocked. I will attempt to fix that.
Frank
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Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
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