All of them point to same Resolution : This issue is resolved by making the following change to the PRPC operating environment: Increased the WebSphere parameters ConnectionIOTimeOut and ConnectionKeepAliveTimeout.
Even we want to apply the same Fix for our Client Application Environment which is running on Websphere 7.X . But before that I've read IBM HELP Article regarding these settings.
IBM Recommends - to configure this settings only if your Websphere Application Version is Pre 6.0 which means this Setting is not applicable for Websphere 7.X ? or Higher versions above 6.X ?
There you can read: "[...]The value specified for this property, in conjunction with the value specified for the Write timeout property, provides the timeout functionality that the ConnectionIOTimeout custom property provided in previous releases."
So in regard of your reported problem, basically only the name for the parameter has changed. For further details, please contact your IBM WebSphere Support.