2565205 - com.sap.icc.task.TaskDocument.getTask() of a null object loaded from local variable 'document' - Information Steward

• Tasks fail intermittently with java.lang.NullPointerException: while trying to invoke the method com.sap.icc.task.TaskDocument.getTask() of a null object loaded from local variable 'document'
• Rerun the task manually after failure and it succeeds
• Task log contains the following stack trace:

java.lang.NullPointerException: while trying to invoke the method com.sap.icc.task.TaskDocument.getTask() of a null object loaded from local variable 'document'
      at com.sap.icc.task.optimizer.RuleLastRunOptimizer.optimize(RuleLastRunOptimizer.java:77)
      at com.sap.icc.task.job.AbstractTaskJob.optimize(AbstractTaskJob.java:66)
      at com.sap.icc.task.DataServiceDispatcherTaskStrategy.setTaskReady(DataServiceDispatcherTaskStrategy.java:167)
      at com.sap.icc.task.DataServiceDispatcherTaskStrategy$TaskMonitor.run(DataServiceDispatcherTaskStrategy.java:325)
      at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
      at java.util.concurrent.FutureTask.run(FutureTask.java:266)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      at java.lang.Thread.run(Thread.java:812)

SAP Information Steward 4.2 SP8

KBA , EIM-IS-DI , Information Steward - Data Insight , Problem