[jbpm-issues] [JBoss JIRA] Commented: (JBPM-2692) Still problems with variables of Serializable objects

Still problems with variables of Serializable objects ----------------------------------------------------- Key: JBPM-2692 URL: https://jira.jboss.org/jira/browse/JBPM-2692 Project: jBPM Issue Type: Bug Security Level: Public(Everyone can see) Components: Runtime Engine Affects Versions: jBPM 3.2.6.SP1 Environment: jBPM 3.2.6.SP1 embedded into a web application Reporter: Mauro Molinari There are times in which when calling org.jbpm.context.exe.VariableInstance.getValue(), the proprty token is null. In this case, if the variable object is of a Serializable class and this class is in the PAR, calling getValue() will fail with a ClassNotFound exception if the process class loader is not the one who loaded the SerializableToByteArrayConverter class. This is because the method org.jbpm.context.exe.converter.SerializableToByteArrayConverter.revert(ByteArray) (without the token) is called and a plain ObjectInputStream is used to do the deserialization. I don't have a simple test case to reproduce, but this is what I am doing: - my webapp application is retreiving all the logs associated to a ProcessInstance using org.jbpm.db.LoggingSession.findLogsByProcessInstance(long) - it is iterating over the collection and, for each ProcessLog instance, it is retreiving the variable instance values (for example: org.jbpm.context.log.VariableCreateLog the method org.jbpm.context.log.VariableLog.getVariableInstance() is called; for a org.jbpm.context.log.VariableUpdateLog the methods org.jbpm.context.log.VariableUpdateLog.getOldValue() and org.jbpm.context.log.VariableUpdateLog.getNewValue() are called and so on) - a ClassNotFoundException is launched; the class loader in use is that of the webapp, so it's normal that the class of the variable value cannot be found, since it is a serializable class provided by the PAR. I don't know why token is null: should it be restored by Hibernate? Looking at org.jbpm.context.exe.VariableInstance the only explicit code that sets the token property is in org.jbpm.context.exe.VariableInstance.create(Token, String, Object).