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Workaround for BUG 10550614 and NOTE 527156.1 : Use HTTP 1.0 on outbound web service calls. (Doc ID 1333375.1)

Last updated on MARCH 01, 2018

Applies to:

Siebel CRM - Version 8.0.0.3 SIA [20416] and later
Information in this document applies to any platform.

Symptoms

On : 8.0.0.3 SIA [20416] version, Siebel EAI

ACTUAL BEHAVIOR
---------------
Outbound web service calls are causing the 3rd party web server to reach the maximum number of http connections allowed.
This happens because on first http call from siebel, a connection is opened, used and left open for later re-use (default http 1.1 behavior).
But due to conditions external to siebel (e.g: a firewall timing out idle http connections) the connection becomes invalid.
Neither Siebel, nor the external system notice at first that the connection is no longer valid.
On a further web service call, siebel tries to re-use the connection as it should but notices it is no longer valid.
Siebel automatically opens a new connection and proceeds with the call successfully.
The other system never gets a notice the old connection is invalid though.
As a result, the number of http connections opened to the 3rd party system increases over time.

A workaround was attempted to force siebel not to re-use connections:
EAI HTTP Transport was scripted to send the http header: connection:close.
This should force siebel to open non persistent http connections. As a result, a connection should be opened, used and immediately closed.
Due to a siebel bug 10550614, the workaround caused poor performance due to the behavior described at: HTTP Transport not returning data to Siebel until TCP connection is closed [ID 527156.1]

EXPECTED BEHAVIOR
-----------------------
HTTP connections should be re-used, avoiding an overhead on the target server or when non persistent connections are used, there should be no delay in getting back the response.

STEPS
-----------------------
The issue can be reproduced at will with the following steps:
1. just call outbound web services repeatedly and monitor the 3rd party system for number of http connections opened.

BUSINESS IMPACT
-----------------------
The issue has the following business impact:
Due to this issue, users cannot use persistent connections as it impacts the 3rd party system, and also can not use non persistent connections as it causes a performance issue in receiving data.

Cause

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In this Document
Symptoms
Cause
Solution
References


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