This article is a legacy article. It applies to previous versions of the Liferay product. While the article is no longer maintained, the information may still be applicable.
In a clustered environment with Remote Live staging turned on, user may see printed in the logs "unable to serialize delta request for sessionid" and a
NotSerializableException periodically appearing. Here is an example:
SEVERE: Unable to serialize delta request for sessionid [B7965B1BECDA70F112DE9CEC67FAF1A7.es-ppwccs01-wccs1] java.io.NotSerializableException: com.liferay.portal.model.LayoutStagingHandler
Liferay Portal 6.1.x EE
Resolved on Liferay Portal 6.2Request for the solution described on LPS-30303