Problem with NTLM proxy authentication

[Mario-Leander Reimer]

Hi Mule users,



I am having troubles getting a <cxf:jaxws-client> to work properly when the
outbound endpoint needs to connect via a NTLM protected proxy server. The
first call to the backend service will usually fail, a second subsequent
call does usually work (probably due to keep-alive). The root exception is:



Caused by: org.apache.commons.httpclient.ProtocolException: Unbuffered
entity enclosing request can not be repeated.

at
org.apache.commons.httpclient.methods.EntityEnclosingMethod.writeRequestBody(EntityEnclosingMethod.java:487)

at
org.apache.commons.httpclient.HttpMethodBase.writeRequest(HttpMethodBase.java:2114)

at
org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1096)



I guess this might be related to the NTLM authentication challenge send by
the proxy server. But why is the first call not working properly? Any ideas
how this can be fixed without putting a retry logic in the calling client
applications (which is a workaround for now, but not a solution)??



Thanks for your help!

Leander



------------------ Stacktrace
------------------------------------------------------------------------------------



Caused by: org.mule.api.transport.DispatchException: Failed to route event
via endpoint: DefaultOutboundEndpoint{endpointUri=http

:// …… /PortalDataService/PortalDataService.asmx, connector=HttpConnector

{

name=httpConnector

lifecycle=start

this=66ec16c

numberOfConcurrentTransactedReceivers=4

createMultipleTransactedReceivers=true

connected=true

supportedProtocols=[http]

serviceOverrides=


dispatcher.factory=com.bmw.iap.osp.server.mule.HttpAutoProxyMessageDispatcherFactory

}

, name='endpoint.http………...PortalDataService.PortalDataService.asmx',
mep=REQUEST_RESPONSE, properties={}, transac

tionConfig=Transaction{factory=null, action=NEVER, timeout=0},
deleteUnacceptedMessages=false, initialState=started, responseTime

out=60000, endpointEncoding=UTF-8, disableTransportTransformer=false}.
Message payload is of type: PostMethod

at
org.mule.transport.http.HttpClientMessageDispatcher.execute(HttpClientMessageDispatcher.java:154)

at
org.mule.transport.http.HttpClientMessageDispatcher.doSend(HttpClientMessageDispatcher.java:271)

at
org.mule.transport.AbstractMessageDispatcher.process(AbstractMessageDispatcher.java:83)

at
org.mule.transport.AbstractConnector$DispatcherMessageProcessor.process(AbstractConnector.java:2515)

at
org.mule.module.cxf.CxfOutboundMessageProcessor.processNext(CxfOutboundMessageProcessor.java:151)

at
org.mule.module.cxf.transport.MuleUniversalConduit.processNext(MuleUniversalConduit.java:353)

at
org.mule.module.cxf.transport.MuleUniversalConduit.dispatchMuleMessage(MuleUniversalConduit.java:250)

... 98 more

Caused by: org.apache.commons.httpclient.ProtocolException: Unbuffered
entity enclosing request can not be repeated.

at
org.apache.commons.httpclient.methods.EntityEnclosingMethod.writeRequestBody(EntityEnclosingMethod.java:487)

at
org.apache.commons.httpclient.HttpMethodBase.writeRequest(HttpMethodBase.java:2114)

at
org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1096)