Jacek Laskowski created SPARK-12037:
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Summary: Executors use heartbeatReceiverRef to report heartbeats
and task metrics that might not be initialized and leads to NullPointerException
Key: SPARK-12037
URL: https://issues.apache.org/jira/browse/SPARK-12037
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 1.6.0
Environment: The latest sources at revision {{c793d2d}}
Reporter: Jacek Laskowski
When {{Executor}} starts it starts driver heartbeater (using
{{startDriverHeartbeater()}}) that uses {{heartbeatReceiverRef}} that is
initialized later and there is a possibility of NullPointerException (after
{{spark.executor.heartbeatInterval}} or {{10s}}).
{code}
WARN Executor: Issue communicating with driver in heartbeater
java.lang.NullPointerException
at
org.apache.spark.executor.Executor.org$apache$spark$executor$Executor$$reportHeartBeat(Executor.scala:447)
at
org.apache.spark.executor.Executor$$anon$1$$anonfun$run$1.apply$mcV$sp(Executor.scala:467)
at
org.apache.spark.executor.Executor$$anon$1$$anonfun$run$1.apply(Executor.scala:467)
at
org.apache.spark.executor.Executor$$anon$1$$anonfun$run$1.apply(Executor.scala:467)
at org.apache.spark.util.Utils$.logUncaughtExceptions(Utils.scala:1717)
at org.apache.spark.executor.Executor$$anon$1.run(Executor.scala:467)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{code}
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