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Came across this problem a little while ago, we had deployed a production system where we had 2 BizTalk servers which were sending messages to a large .net application. There were 9 web servers hosting the .net web services. Intermittently we were getting the following error message taken from the event log on the BizTalk server. Event Type: Warning
Event Source: BizTalk Server 2006
Event Category: BizTalk Server 2006
Event ID: 5743
Date: 15/03/2008
Time: 13:06:02
User: N/A
Computer: BTSSvr1
Description:
The adapter failed to transmit message going to send port "Snd_AcmeApplicationService" with URL "wse://http://<Removed>/Acme.WebServices/CustomWebService.asmx". It will be retransmitted after the retry interval specified for this Send Port. Details:"The underlying connection was closed: An unexpected error occurred on a receive.". Upon investigation the network guys found that 2 of the 9 web servers had been configured with the wrong Subnet Mask and when the request hit either of these boxes it was failing and the other boxes were fine.
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