Rainer, Thanks for the quick response!
I am able to repeat this request, and each time I get the same response. The logging level is set to debug, but unfortunately I am unable to send the log file (company policy). I am going to scrub the log file to remove any sensitive information, I will send that your way shortly. I did some network sniffing and CONTENT_LENGTH is not sent. I built a new isapi_redirect.dll using the patch provided in Bugzilla. This patch was supposed to allow chunked encoding, but I am not sure if I applied it right. Is there a registry setting that I need to change to allow chunked encoding with this patch, or does it do it automatically? Thanks- Joe -----Original Message----- From: Rainer Jung [mailto:[EMAIL PROTECTED] Sent: Friday, January 04, 2008 2:06 PM To: Tomcat Users List Subject: Re: Content_Length Problem Hi Joe, are you able to reproduce the behaviour with few, maybe only a single request? If so: you can increase JkLogLevel to "debug" (not recommended for high load production size, because it produces a lot of log lines), reproduce the problem and make the log file available. What I didn't really understand from your post: do you know, if the Content-Length header gets send or not? How do you know? Did you sniff the network traffic or do you only know from the CICS behaviour? Lastly: HTTP/1.1 responses without Content-Length headers are valid if they are using chunked encoding (Transfer-Encoding: chunked). I think at the moment the isapi redirector does not use chunked encoding (didn't yet test, but there's an open RFE to implement chunked encoding in the isapi redirecotr), but I want to clarify the absolute statement concerning the http protocol. Chunked encoding replaces the content-length header with sending the number of bytes available in front of every chunk, s.t. the receiving node knows, how much data to expect, without the sending node needing to know the full size before sending. Dynamically generated content often uses chunked encoding to prevent the need of buffering the whole reposne before sending. Regards, Rainer Woytasik Joe schrieb: > I have a custom webservice hosted on IIS 6.0 and Tomcat 6, and I am > using the latest version of the isapi_redirect.dll. The problem > occurs when a CICS mainframe application tries to call this webservice. > Everything appears to work fine, but the CICS application receives a > response indicating a zero length message. I can view the message > being sent from the webservice and this is definitely not the case > (have also taken several packet traces to confirm this). We sent our > problem to the folks over at IBM and they say that the CONTENT_LENGTH > is not being set. > > Here is their response: > > The problem is that there isn't a Content-Length header sent by the > IIS/Tomcat Server. CICS receives the headers and finds it is an > HTTP/1.1 response for a Connection: Close. There isn't a > Content-Length header so there can't be any user data (HTTP/1.1 has to > supply Content-Length) so DFHWBCL just closes the session. PI domain > then indicates that it failed to receive a response. The customer > needs to investigate why their IIS server didn't return a > Content-Length header. > . > The Content-Length header is mandatory for CICS' HTTP/1.1 > conversations. This is documented in the CICS/TS 3.1 Internet Guide, > section 1.3.11.1 ("CICS Web support behavior in compliance with > HTTP/1.1"); this chapter documents the requirement in a section titled > "New Behavior for CICS TS Version 3", under the first item "CICS > checks inbound messages for compliance with HTTP/1.1, and handles or > rejects non-compliant messages": > Note: CICS requires the Content-Length header on all inbound > HTTP/1.1 messages that have a message body. If a message body is > present but the header is not provided, or its value is inaccurate, > the socket receive for the faulty message or for a subsequent message > can produce unpredictable results. For HTTP/1.0 messages that have a > message body, the Content-Length header is optional. > . > The reason this is mandatory under CICS/TS 3.1, is due to our > adherance to HTTP/1.1 specifications -- in other words, your HTTP/1.1 > Web Service PROVIDER platform must provide this header, to be considered compliant. > . > Please ensure the IIS/Tomcat server sends a proper header. > > If we make the same request directly to Tomcat using the port number > it works fine. The problem either lies in the isapi_redirect.dll or > the IIS configuration. Does anyone have any ideas on what I can try > to resolve this? Is there a know bug with the isapi_redirect.dll and > CONTENT_LENGTH? > > Thanks- > Joe > > This e-mail is confidential. If you are not the intended recipient, you must not disclose or use the information contained in it. 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