Hi All, The business requirement needs me to serialize a statefule session into a file. However, the session object may be huge, which may take 500M memory space. So it will take several seconds to serialize it. During the serialization process, the session may still in use, such as asserting an object, executing fireAllRules command, which will cause the session to change. Is there any way to pause or halt the session? Otherwise, Is there any good practice to serialize a big session object which may still be in change? Thank you very much. Any response will be appreciated. -- View this message in context: http://drools.46999.n3.nabble.com/Does-a-StatefulKnowledgeSession-still-c... Sent from the Drools: User forum mailing list archive at Nabble.com.