I am using BizTalk Server 2009 to send EDI messages to my client using AS2. I am able to send messages, but getting an error while sending messages that exceeds 5KB of file size. I checked with the partner whether they are using any restrictions on file size, but they are able to exchange even some GB's of files with other trading partner.
I compared the files that are successfully sent with the one that failed. But found no difference between two except LIN, PIA, QTY and other segments.
I found the below error when tracked in event viewer.
The adapter failed to transmit message going to send port "SendTextFile" with URL "http://xxclienturlxx.com:2080/ipnet/as2". It will be retransmitted after the retry interval specified for this Send Port. Details:"The remote server returned an error: (500) Internal Server Error.".
How do I resolve this?
Found the solution..
In BizTalk 2009, disabling "Enable chunked encoding" in Send port Transport type properties did the trick for me...
To have large message support when the size of the message is greater than 48 KB, the http send adapter is sending the data in chunks to the server instead of a full stream"
This post HTTP Send Adapter - Submit to ASP Page Issue helped me to find the solution.