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This occured while I was running through the Glassfish/WSIT web services tutorials, right after I'd deployed a WSIT-enabled client. It is a clean NB 5.5 install (purely for WSIT, downloaded 5.5B2 this morning), WSIT istalled through the update centre. It does not seem to be consistent; I tried closing and re-starting NetBeans then tried both running and redeploying the client again and I did not see the error again.
Created attachment 33823 [details] Message.log file
Can you try this with a later, nightly build? We have fixed a lot of bugs in this area recently.
Please increase priority if this can be reproduced.
Please reopen if it recurs.