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Patrick Wendell commented on SPARK-3687: ---------------------------------------- Can you perform a jstack on the executor when it is hanging? We usually only post things on JIRA like this when a specific issue has been debugged a bit more. But if you can produce a jstack of the hung executor we can keep it open :) > Spark hang while processing more than 100 sequence files > -------------------------------------------------------- > > Key: SPARK-3687 > URL: https://issues.apache.org/jira/browse/SPARK-3687 > Project: Spark > Issue Type: Bug > Components: Spark Core > Affects Versions: 1.0.2, 1.1.0 > Reporter: Ziv Huang > > In my application, I read more than 100 sequence files to a JavaPairRDD, > perform flatmap to get another JavaRDD, and then use takeOrdered to get the > result. > It is quite often (but not always) that the spark hangs while the executing > some of 110th-130th tasks. > The job can hang for several hours, maybe forever (I can't wait for its > completion). > When the spark job hangs, I can't find any error message in anywhere, and I > can't kill the job from web UI. > The current workaround is to use coalesce to reduce the number of partitions > to be processed. > I never get a job hanged if the number of partitions to be processed is no > greater than 80. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org