[rules-users] Task persistence problem

Hi, I'm not sure if this is the best place to ask this, I'll give it a try. I'm building an application with drools, one of the features is that it should keep a “TODO List”, this is given by the human tasks contained in ruleflows, I've managed to set up drools persistence for workflows kwnoeledge sessions and humans tasks (tricky but i got it working), however it seems that I'm still missing something, when I try to start a workflow with 2 human tasks and a script tasks, arranged like this start >> human task 1 >> script task >> human tasks 2 >> end its behavior is irregular. A first review of this problem got me to the conclusion that the ruleflow fails to register (with mina) the second human task about half the times (first one is allways a success), interesting is that if you start the ruleflow several times it shows a “pattern”, it registers the task once then it does not, then it registers the task again and so on. When it is unable to register the second task I don't get any exception report (on the web interface) however after looking at the server logs I found that every time the ruleflow fails to register the second task an exception is thrown, it is java.lang.IllegalArgumentException: attempt to create merge event with null entity followed by a java.lang.NullPointerException (I can provide the full stack trace or the log output of drools if you need them, I'm trying to keep this post as readable as possible) Digging deeper in this situation I noticed that some weird values are getting inserted on the column workItemId on table Task (which I guess is mapped from org.drools.task.Task), and sometimes the value 0 gets inserted in this column (this colums right now looks looks like 22,0,24,25,0), so my guess is that the human task is actually getting registered to mina but, it is not registered in a “proper way” and those 0s are a sign of it. Has any one any idea of what might be happening (what I might be missing), any help will be appreciated. By the way I'm using drools 5.1 The database is a mysql database. The persistence of the workflows and tasks is done in the same mysql server but in different databases. I'm using mina as task server and task client on the default port. This whole thing is running inside a jboss 5.1 server on jdk 1.5. I can provide more implementation details, logs or code if necessary Thanks in advance Fuanka -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Task-persistence-prob... Sent from the Drools - User mailing list archive at Nabble.com.