Lukasz Kaleta [https://community.jboss.org/people/lukaszk] created the discussion "NullPointerException at org.jboss.cache.invocation.NodeInvocationDelegate.isValid(NodeInvocationDelegate.java:480)" To view the discussion, visit: https://community.jboss.org/message/763630#763630 -------------------------------------------------------------- Hi, we are getting such exception on production server: java.lang.NullPointerException         at org.jboss.cache.invocation.NodeInvocationDelegate.isValid(NodeInvocationDelegate.java:480)         at org.hibernate.cache.jbc.BasicRegionAdapter.ensureRegionRootExists(BasicRegionAdapter.java:271)         at org.hibernate.cache.jbc.access.TransactionalAccessDelegate.get(TransactionalAccessDelegate.java:70)         at org.hibernate.cache.jbc.entity.TransactionalAccess.get(TransactionalAccess.java:63)         at org.hibernate.event.def.DefaultLoadEventListener.loadFromSecondLevelCache(DefaultLoadEventListener.java:587)         at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:459)         at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:227)         at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:147)         at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1090)         at org.hibernate.impl.SessionImpl.immediateLoad(SessionImpl.java:1026)         at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:176)         at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:215)         at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190)         at org.jbpm.graph.def.Action_$$_javassist_264.getEvent(Action_$$_javassist_264.java)         at org.jbpm.graph.exe.ExecutionContext.setAction(ExecutionContext.java:85)         at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:271)         at sun.reflect.GeneratedMethodAccessor1306.invoke(Unknown Source)         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)         at java.lang.reflect.Method.invoke(Method.java:597)         at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:197)         at org.jbpm.graph.node.State_$$_javassist_147.executeAction(State_$$_javassist_147.java)         at org.jbpm.job.Timer.execute(Timer.java:59)         at sun.reflect.GeneratedMethodAccessor1305.invoke(Unknown Source)         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)         at java.lang.reflect.Method.invoke(Method.java:597)         at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:197)         at org.jbpm.job.Job_$$_javassist_235.execute(Job_$$_javassist_235.java) maybe somene have a hint how to solve this ? -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/763630#763630] Start a new discussion in JBoss Cache at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]