HTTP client. Code 401 reason ICM_HTTP_CONNECTION_BROKEN

Hello all,

We have a RFC--> XI --> HTTP scenario. It was working fine all along. Suddenly every now and then we're getting the following error. Its not a timeout issue..since it does succeed every now and then.

Have anybody encountered this issue before.

  <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>

- <!--  Call Adapter

  -->

- <SAP:Error xmlns:SAP="http://sap.com/xi/XI/Message/30" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" SOAP:mustUnderstand="">

  <SAP:Category>XIAdapter</SAP:Category>

  <SAP:Code area="PLAINHTTP_ADAPTER">ATTRIBUTE_CLIENT</SAP:Code>

  <SAP:P1>401</SAP:P1>

  <SAP:P2>ICM_HTTP_CONNECTION_BROKEN</SAP:P2>

  <SAP:P3 />

  <SAP:P4 />

  <SAP:AdditionalText />

  <SAP:ApplicationFaultMessage namespace="" />

  <SAP:Stack>HTTP client. Code 401 reason ICM_HTTP_CONNECTION_BROKEN</SAP:Stack>

  <SAP:Retry>N</SAP:Retry>

  </SAP:Error>

Your help is greatly appreciated.

Thanks

Karthik