Hi Michael,

Do you think SAX is a good alternative for the DOM in this case. We can 
migrate the parsing mechanism to SAX if there is no thread safe issue in 
SAX parser.

Thanks,
Soumya Chatterjee
Tata Consultancy Services
Mailto: [EMAIL PROTECTED]
Website: http://www.tcs.com
____________________________________________
Experience certainty.   IT Services
                        Business Solutions
                        Outsourcing
____________________________________________



Michael Glavassevich <[EMAIL PROTECTED]> 
07/24/2007 07:27 PM

To
Soumya Chatterjee <[EMAIL PROTECTED]>
cc
j-users@xerces.apache.org
Subject
Re: Got the Issue






Hi Soumya,

Xerces' DOM implementation isn't thread-safe. If you try to access the 
same DOM instance from multiple threads without synchronizing it you'll 
run into these problems. You either need to synchronize your code or 
create an instance of the DOM tree per thread. There's really no way 
around it.

Thanks.

Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: [EMAIL PROTECTED]
E-mail: [EMAIL PROTECTED]

Soumya Chatterjee <[EMAIL PROTECTED]> wrote on 07/24/2007 09:42:08 

AM:
 
> Hi Michael, 
> 
> I found out the response from you regarding the "xerces DOM 
> concurrent access" and I think it is the same as our application in 
> the case.  http://spteam-lists.blogspot.com/2007/04/re-xerces-dom-
> concurrent-access-and.html 
> 
> By the way we were not getting the exception as frequently  in the 
> weblogic 7.1 ( JDK 1.3) when we are using the following Xerces.
> 
> But we are getting the exception in case of weblogic 9.1 much more 
> frequently which uses JDK1.5 and different version of Xerces. 
> 
> Synchronization is not an option in this case because there is a 
> huge performance issue here. Please let me know if any way we can 
> get read of this problem without using the Synchronization  block. 
> 
> Thanks,
> Soumya Chatterjee
> Tata Consultancy Services
> Mailto: [EMAIL PROTECTED]
> Website: http://www.tcs.com
> ____________________________________________
> Experience certainty.        IT Services
>                        Business Solutions
>                        Outsourcing
> ____________________________________________

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