Andrey created FLINK-5551:
-----------------------------
Summary: NPE at SourceStreamTask
Key: FLINK-5551
URL: https://issues.apache.org/jira/browse/FLINK-5551
Project: Flink
Issue Type: Bug
Components: DataStream API
Affects Versions: 1.2.0
Reporter: Andrey
Prerequisites:
* Configure hdfs-based backend for the job
* cancel it using webapp admin
In logs during shutdown:
{code}
2017-01-17 16:22:08,756 INFO
org.apache.flink.streaming.runtime.tasks.StreamTask - Using
user-defined state backend: File State Backend @
hdfs://host:port/flink-checkpoints
2017-01-17 16:22:08,756 INFO org.apache.flink.runtime.taskmanager.Task
- Attempting to cancel task Source: Custom Source -> Filter (3/8)
2017-01-17 16:22:08,756 INFO org.apache.flink.runtime.taskmanager.Task
- Source: Custom Source -> Filter (3/8) switched to CANCELING
2017-01-17 16:22:08,756 INFO org.apache.flink.runtime.taskmanager.Task
- Triggering cancellation of task code Source: Custom Source ->
Filter (3/8) (559a224c8ef78884db727dab0b2d5e99).
2017-01-17 16:22:08,756 ERROR org.apache.flink.runtime.taskmanager.Task
- Error while canceling the task
java.lang.NullPointerException
at
org.apache.flink.streaming.runtime.tasks.SourceStreamTask.cancelTask(SourceStreamTask.java:61)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.cancel(StreamTask.java:349)
at
org.apache.flink.runtime.taskmanager.Task$TaskCanceler.run(Task.java:1214)
at java.lang.Thread.run(Thread.java:745)
{code}
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