Jamie Grier created FLINK-3627: ---------------------------------- Summary: Task stuck on lock in StreamSource when cancelling Key: FLINK-3627 URL: https://issues.apache.org/jira/browse/FLINK-3627 Project: Flink Issue Type: Bug Components: Core Reporter: Jamie Grier
I've seen this occur a couple of times when the # of network buffers is set too low. The job fails with the an appropriate message indicating that the user should increase the # of network buffers. However, some of the task threads then hang with a stack trace similar to the following. 2016-03-16 13:38:54,017 WARN org.apache.flink.runtime.taskmanager.Task - Task 'Source: EventGenerator -> (Flat Map, blah -> Filter -> Projection -> Flat Map -> Timestamps/Watermarks -> Map) (46/144)' did not react to cancelling signal, but is stuck in method: org.apache.flink.streaming.api.operators.StreamSource$ManualWatermarkContext.collect(StreamSource.java:317) flink.benchmark.generator.LoadGeneratorSource.run(LoadGeneratorSource.java:38) org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:78) org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56) org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:224) org.apache.flink.runtime.taskmanager.Task.run(Task.java:559) java.lang.Thread.run(Thread.java:745) -- This message was sent by Atlassian JIRA (v6.3.4#6332)