NIO transport does not work with IIS as the LB due to "Expect: 100-Continue"
ESB NIO transport does not work with IIS as the LB due to "Expect: 100-Continue"
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Key: SYNAPSE-850
URL: https://issues.apache.org/jira/browse/SYNAPSE-850
Project: Synapse
Issue Type: Bug
Environment: Windows , IIS 7 + WebSphere load balance, IBM JDK 6
Reporter: Dushan Sachinda Abeyruwan
We are setting up ESB to be load balanced with IIS and ESB receives following
and then IIS does not sends anything at all and requests time out.
Looks like the source of the problems is that IIS sends a HTTP header called
"Expect: 100-Continue", and ESB's apache http core library does not understand
that.
Basically, server suppose to respond to that header, and if not, client does
not send any more data. Is there any chance you can disable that header?
Following links are for your reference:
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
* haacked.com/archive/2004/05/15/http-web-request-expect-100-continue.aspx
Header received is given below
POST /services/InformationProxy HTTP/1.1
Content-Length: 157
Content-Type: text/xml;charset=UTF-8
Accept-Encoding: gzip,deflate
Host: www-zzz.com.zz
User-Agent: Jakarta Commons-HttpClient/3.1
SOAPAction: "urn:mediate"
$WSIS: false
$WSSC: http
$WSPR: HTTP/1.1
$WSRA: 10.64.212.96
$WSRH: 10.64.212.96
$WSSN: www-aaaaaa
$WSSP: 80
Surrogate-Capability: WS-ESI="ESI/1.0+"
_WS_HAPRT_WLMVERSION: -1
Expect: 100-Continue
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