Webservice call from BizTalk 2010 to IIS7 fails. The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.


i need investigate more on issue related keep alive settings in iis 7 mentioned in link http://seroter.wordpress.com/2007/08/06/troubleshooting-canceled-web-request/

in our case have orchestration in biztalk 2010 (windows server 2008 r2 standard , iis7) calls webservice (asmx) hosted in iis 7. checked configuration [the "ping maximum responser time (seconds)" under "process model" settings] in iis on both server [biztalk hosting , web service hosting server] , settings same. don't option set keepalive=false, since need use connection pooling feature. have mentioned below exact error message in biztalk server.

webexception: underlying connection closed: connection expected kept alive closed server.
ioexception: unable read data transport connection: existing connection forcibly closed remote host.
socketexception: existing connection forcibly closed remote host

most of our webservice calls orchestration working expected, 5% of webservice calls fails.
please point me right direction trouble shoot issue.

thanks , regards, vikram

it network issue. actual network problem not detected, resolved our issue.

we looked @ iis logs on web server (where web service hosted) , see request coming web server not completed. there error in iis log while sending request (sc-win32-status 121 , 1236). looks network connection between these 2 servers terminate. (something related way snat works)

to resolve our issue, had keep web service , biztalk on same network. 

once did that, resolved our issue.

thanks , regards, vikram



BizTalk Server  >  BizTalk Server General



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