Red Hat Bugzilla – Bug 1022944
session-migration: NPE in SubTaskDecorator.checkSubTaskStrategies as Task.subTaskStrategy is null.
Last modified: 2014-08-06 16:12:39 EDT
Description of problem: When I try to complete a task I get a NPE with the following stack: Exception in thread "main" java.lang.NullPointerException at org.jbpm.services.task.subtask.SubTaskDecorator.checkSubTaskStrategies(SubTaskDecorator.java:196) at org.jbpm.services.task.subtask.SubTaskDecorator.complete(SubTaskDecorator.java:101) at org.jbpm.services.task.deadlines.DeadlinesDecorator.complete(DeadlinesDecorator.java:113) at org.jbpm.services.task.impl.TaskServiceEntryPointImpl.complete(TaskServiceEntryPointImpl.java:253) at org.jboss.qa.bpms.jbpm.LoadSessionTest.humanTaskWithTaskServiceTest(LoadSessionTest.java:257) at org.jboss.qa.bpms.jbpm.LoadSessionTest.main(LoadSessionTest.java:310) The issue is caused by the update of tables from jBPM 5 to 6. The 'subTaskStrategy' column will be 'null' for all tasks. e.g. mysql> select subTaskStrategy from Task; +-----------------+ | subTaskStrategy | +-----------------+ | NULL | +-----------------+ 1 row in set (0.00 sec) How to reproduce: 1) Execute a process with a human task in 5. 2) Restore it in 6 and complete the task. The 'StoreSessionTest.humanTaskWithTaskServiceTest' amd 'LoadSessionTest.humanTaskWithTaskServiceTest' in http://git.app.eng.bos.redhat.com/jbossqe/brms.git/tree/test-jbpm-session-migration can be used to reproduce the issue.
I set the severity to 'High' because I believe that many customers will use the migration feature to move their processes from 5 to 6. If the feature does not work then their operation will be impacted in great extent.
fixed to ensure the sub task strategy is checked before it's used jbpm master: https://github.com/droolsjbpm/jbpm/commit/23672ee22a94ffdaed1651abb4eb1ba22cc7a0aa 6.0.x https://github.com/droolsjbpm/jbpm/commit/ba1f9b87d6821d5f9fb71c42e6fe97d1e4082221
Verified on ER5.