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Ufuk Celebi commented on FLINK-4014: ------------------------------------ Hey Zheng! Thanks for the stack trace. All tasks are either requesting a buffer to write records to or a buffer to read from. - Is this happening reproducibly? - Can you check the system load when this happens? Is the system idling or is there disk I/O happening? - Can you please post the plan via env.getExecutionPlan()? > Jobs hang. Maybe NetworkBufferPool and LocalBufferPool has some problem > ----------------------------------------------------------------------- > > Key: FLINK-4014 > URL: https://issues.apache.org/jira/browse/FLINK-4014 > Project: Flink > Issue Type: Bug > Reporter: ZhengBowen > Attachments: FlinkJob_20160603_174748_000003.java, hang.stack > > > I also run a five jobs, and all the slot filled.And I seem to find my five > jobs is all hanged. > Following attachments are my jstack and job source code. > The hang.stack display all thread related to the job is WAIT. Why? -- This message was sent by Atlassian JIRA (v6.3.4#6332)