[SPARK-5783] Include filename, line number in eventlog-parsing error message

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Fix Version/s: 1.3.2, 1.4.0
• Component/s: Spark Core
• Assignee: Ryan Williams
• Reporter: Ryan Williams
• Created: 12/Feb/15 19:55
• Updated: 05/Oct/15 14:32
• Resolved: 05/Oct/15 14:30

Description

While investigating why some recent applications were not showing up in my History Server UI, I found error message blocks like this in the history server logs:

15/02/12 18:51:55 ERROR scheduler.ReplayListenerBus: Exception in parsing Spark event log.
java.lang.ClassCastException: org.json4s.JsonAST$JNothing$ cannot be cast to org.json4s.JsonAST$JObject
	at org.apache.spark.util.JsonProtocol$.mapFromJson(JsonProtocol.scala:814)
	at org.apache.spark.util.JsonProtocol$.executorInfoFromJson(JsonProtocol.scala:805)
...
	at org.apache.spark.deploy.history.FsHistoryProvider$$anon$1.run(FsHistoryProvider.scala:84)
15/02/12 18:51:55 ERROR scheduler.ReplayListenerBus: Malformed line: {"Event":"SparkListenerExecutorAdded","Timestamp":1422897479154,"Executor ID":"12","Executor Info":{"Host":"demeter-csmaz11-1.demeter.hpc.mssm.edu","Total Cores":4}}

Turns out certain files had some malformed lines due to having been generated by a forked Spark with some WIP event-log functionality.

It would be nice if the first line specified the file the error was found in, and the last line specified the line number.

Issue Links

• links to: [Github] Pull Request #4573 (ryan-williams)