Yes, 9.1.0.6 is a stable maintenance release.
 
There have been no changes in this particular area, other than the code to catch the exception when it occurred and produce diagnostic output. It seems that this change to the code has been enough to make the bug go away. I'll leave it in for the time being - it does no harm.
 
Michael Kay
http://www.saxonica.com/


From: Ackley, Paul [mailto:Paul.Ackley@qwest.com]
Sent: 27 March 2009 13:30
To: Mailing list for the SAXON XSLT and XQuery processor
Subject: Re: [saxon] ArrayIndexOutOfBoundsException in Saxon 8.6

Michael,
 
The 9.1.0.6 build of Saxon has been in place for almost 2 weeks and we have not seen any ArrayIndexOutOfBoundsException being thrown since.  I do have a could of questions:
 
1. Was there any changes to the code which was involved in the ArrayIndexOutOfBoundsException - aside from the debugging output should this error happen?
2. Is this version of Saxon a stable release?  We will likely continue to use this version, even though I am a bit nervous since I cannot purposly cause this error to happen with the older versions of saxon... etc....
 
This has been an interesting bug (most likely with the JVM not Saxon)... :)
 
Thanks!
Paul Ackley

From: Michael Kay [mailto:mike@saxonica.com]
Sent: Thursday, March 19, 2009 4:30 PM
To: 'Mailing list for the SAXON XSLT and XQuery processor'
Subject: Re: [saxon] ArrayIndexOutOfBoundsException in Saxon 8.6

Yes, it did occur to me that if this is a JVM bug, then adding the diagnostic code may cause the bug to disappear. (A Heisenbug, I like that term).
 
I haven't done anything else that could cause the bug to disappear, so I think this would be fairly solid confirmation that it's the JVM. Not sure what we do then. If there's solid evidence of a JVM bug I'm prepared to put in a circumvention to avoid it, but I'm reluctant to do it on the basis of a wild guess.
 
Michael Kay
http://www.saxonica.com/

 


From: Ackley, Paul
Sent: Thursday, March 19, 2009 4:02 PM
To: 'Mailing list for the SAXON XSLT and XQuery processor'
Subject: RE: [saxon] ArrayIndexOutOfBoundsException in Saxon 8.6

Michael,
 
The 9.1.0.6 build of Saxon has been installed and the application has been running for 3 days without running into this "ArrayIndexOutOfBoundsException" exception.  I'll let you know if it happens and what the debugging output looks like.  Typically, by now the problem has occurred.  I'm wondering if the JVM does some optimization of the loop which iterates through the hash and if putting this try/catch in this code possibly caused the JVM to not do the optimization - but really this is just a very weak hypothesis on my part.  Just because it hasn't happened yet doesn't mean it wont.  Time will tell.
 
I'll keep you updated.
 
Thanks for all your help thus far.
 
Paul Ackley