Bugs item #773839, was opened at 2003-07-18 20:26
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=376685&aid=773839&group_id=22866

Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: gui (janssk1)
Assigned to: Nobody/Anonymous (nobody)
Summary: Exception handling in JCA adapter

Initial Comment:
Hello, 

I have some issues with the exception handling of 
exceptions thrown by a custom JCA adapter. 

If an exception occurs during the creation of a managed 
connection, this is handled correcly (the managed 
connection is removed from the pool)

However, if an exception occurs during retrieval of a 
handle (getConnection()), the managed connection is 
not given back to the pool (i think that's a bug). The 
availbleconnectioncount is decreased but there is not 
way to release the managed connection since the 
creation of the handle failed. To prevent this behavior, i 
am forced to send a 'errorOccured' event before 
throwing an exception during creation of a handle. But 
sending this event will destroy the underlying managed 
connection, which is not exactely what i want. I want 
the managed connection to be returned to the pool if 
the getConnection throws an exception. This prevents 
excessive destroying of (wellbehaved) managed 
connections. 


Another issue is related to closing a 'destroyed' 
connection handle. Suppose a major error occurs on the 
underlying managed connection during some operation 
on a handle. According to the spec, i send a notifyError 
to let the container know that this connection is no 
longer useable and throw an exception to the user code.
This user code will typically notice the exception and 
close the handle. But then there's an issue:
The close operation is called on a handle of a 'destoyed' 
managed connection. Should i in the close of the handle 
still send the connectionClosed event ?
If i do it, jboss complains (thows an exception) about 
trying to close a destoyed connection. If i don't, 
i get the 'please to your own housekeeping' message. 

I think jboss should *or* automatically close the handle 
if a fatal error occurs *or* still allow the 
connectionClosed event to be send. 


Any comments are highly appreciated..

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