Till Rohrmann created FLINK-1533:
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Summary: NullPointerException in
SlotSharingGroupAssignment.addSharedSlotAndAllocateSubSlot
Key: FLINK-1533
URL: https://issues.apache.org/jira/browse/FLINK-1533
Project: Flink
Issue Type: Bug
Reporter: Till Rohrmann
The scheduler can fail with a NullPointerException if it is not possible to
allocate a {{SharedSlot}} from an {{Instance}}. In the method
{{Scheduler.getFreeSubSlotForTask}} the allocated {{SharedSlot}} is not checked
that it is not null. This can cause a program to fail if there is a race
condition in scheduling different tasks on the same instance.
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