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HalfOpenSocketRetryException Received While Using the HttpClusterServlet as a Proxy (Doc ID 1391665.1)

Last updated on NOVEMBER 05, 2016

Applies to:

Oracle Weblogic Server - Version: 10.3.2 and later   [Release: and later ]
Information in this document applies to any platform.


When using the HTTPClusterServlet to proxy requests among several managed instances of a WebLogic Server (WLS) cluster, while using version 10.3.2+, the proxy log shows a HalfOpenSocketRetryException. The exception was not thrown in a similarly configured WLS 10.3.0 instance. Here is the full stack trace:

<Fri Dec 09 15:12:09 CET 2011> <[ACTIVE] ExecuteThread: '0' for queue:
'weblogic.kernel.Default (self-tuning)'>: Caught exception while reading response status : weblogic.servlet.proxy.HalfOpenSocketRetryException: status line is null
at weblogic.servlet.proxy.GenericProxyServlet.readStatus(
at weblogic.servlet.proxy.HttpClusterServlet.sendResponse(
at weblogic.servlet.proxy.HttpClusterServlet.service(
at javax.servlet.http.HttpServlet.service(
at weblogic.servlet.internal.StubSecurityHelper$
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(
at weblogic.servlet.internal.ServletStubImpl.execute(
at weblogic.servlet.internal.ServletStubImpl.execute(
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(
at weblogic.servlet.internal.WebAppServletContext$
at weblogic.servlet.internal.WebAppServletContext.securedExecute(
at weblogic.servlet.internal.WebAppServletContext.execute(


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