On May 18, 2008, at 8:41 PM, Owen McKerrow wrote:
Hi All,
In an effort to track down my locking issues I implemented the
LockErrorScreamerEditingContext but unfortunately its not going to
be as useful as I had hoped. I changed my MultiECLockManager to use
a LockErrorScreamerEditingContext but of course this means that
every lock will come from it, so when I get errors like the one
below, the original stack trace that it prints out will always be
from WOSession._awakeInContext.
So does anyone have any other suggestions as to how I go about
tracking down where this mismatched lock is coming from ?
Don't expect it to be easy. Or were you beyond that point? :-)
That trace below looks like it is for the session's
defaultEditingContext. Some possible cases to look at:
1. Something is happening in sleep() such that super.sleep() is not
getting called.
2. Some exception is preventing sleep() from getting called
Offhand, I can't think of anything else that fits.
You can modify LockErrorScreamerEditingContext to log every single
lock and unlock. That can help you track down where the missing
operation is, though it can be a lot to read through.
13:26:40,676 !!! EC HashCode :13694334 editing context being
disposed with 1 locks.
13:26:40,677 !!! Most recently locked by:
java.lang.Throwable
at
edu
.uow
.ris
.framework
.LockErrorScreamerEditingContext
._trace(LockErrorScreamerEditingContext.java:114)
at
edu
.uow
.ris
.framework
.LockErrorScreamerEditingContext
.lock(LockErrorScreamerEditingContext.java:57)
at
com.webobjects.appserver.WOSession._awakeInContext(WOSession.java:717)
at
com
.webobjects
.appserver.WOApplication.restoreSessionWithID(WOApplication.java:1550)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._dispatchWithPreparedApplication(WOComponentRequestHandler.java:314)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._handleRequest(WOComponentRequestHandler.java:358)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
.handleRequest(WOComponentRequestHandler.java:435)
at
com
.webobjects
.appserver.WOApplication.dispatchRequest(WOApplication.java:1306)
at Application.dispatchRequest(Application.java:353)
at
com
.webobjects
.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:173)
at
com
.webobjects
.appserver._private.WOWorkerThread.run(WOWorkerThread.java:254)
at java.lang.Thread.run(Thread.java:613)
Chuck
--
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems.
http://www.global-village.net/products/practical_webobjects
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