[#DWR-298] BaseCallMarshaller.marshallOutbound() results in ConcurrentModificationException error in log - DWR

Details

Type: Bug
Status: Resolved
Priority: Minor
Resolution: Cannot Reproduce
Affects Version/s: 2.0.5
Fix Version/s: 3.0
Component/s: DWRP

Description:

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Occasionally we're seeing the following in our logs:

2008-09-30 16:09:44,265 ERROR org.directwebremoting.dwrp.BaseCallMarshaller --MarshallException: batchId=[some batch ID here] message=java.util.ConcurrentModificationException

It's unclear what's causing the error thus far but looking at the code for BaseCallMarshaller (which suggests that the MarshallException 'is a bit of a "this can't happen" case') it appears that one of the method calls in the try block is triggering a ConcurrentModificationException.

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Occasionally we're seeing the following in our logs: 2008-09-30 16:09:44,265 ERROR org.directwebremoting.dwrp.BaseCallMarshaller --MarshallException: batchId=[some batch ID here] message=java.util.ConcurrentModificationException It's unclear what's causing the error thus far but looking at the code for BaseCallMarshaller (which suggests that the MarshallException 'is a bit of a "this can't happen" case') it appears that one of the method calls in the try block is triggering a ConcurrentModificationException.

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Joe Walker added a comment - 30/Oct/08 1:52 PM

I think that it's likely that DWR isn't at fault here, it's just trying to iterate over a collection as something else changes it. You should probably clone the collection before passing it to DWR if it is likely to change.
Please re-open if you don't think this can be the issue.

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Joe Walker added a comment - 30/Oct/08 1:52 PM I think that it's likely that DWR isn't at fault here, it's just trying to iterate over a collection as something else changes it. You should probably clone the collection before passing it to DWR if it is likely to change. Please re-open if you don't think this can be the issue.

People

Assignee:

Joe Walker

Reporter:

Rob Moore
Votes:

0

Watchers:

0

Dates

Created:

01/Oct/08 12:10 AM

Updated:

31/Oct/08 2:57 PM

Resolved:

30/Oct/08 1:52 PM