Very likely to be this :
http://www.linuxdevcenter.com/pub/a/linux/2006/11/30/linux-out-of-memory.html?page=2

Your worker ran out of memory => maybe you're asking for too much memory for the JVM, or something else is running on the worker

Guillaume
Any idea what this means, many thanks

==> logs/spark-XXXX.XXXX-org.apache.spark.deploy.worker.Worker-1-XXXX09.out.1 <== 15/04/13 07:07:22 INFO Worker: Starting Spark worker XXXX09:39910 with 4 cores, 6.6 GB RAM
15/04/13 07:07:22 INFO Worker: Running Spark version 1.3.0
15/04/13 07:07:22 INFO Worker: Spark home: /remote/users/XXXX/work/tools/spark-1.3.0-bin-hadoop2.4
15/04/13 07:07:22 INFO Server: jetty-8.y.z-SNAPSHOT
15/04/13 07:07:22 INFO AbstractConnector: Started SelectChannelConnector@0.0.0.0:8081 <http://SelectChannelConnector@0.0.0.0:8081> 15/04/13 07:07:22 INFO Utils: Successfully started service 'WorkerUI' on port 8081. 15/04/13 07:07:22 INFO WorkerWebUI: Started WorkerWebUI at http://XXXX09:8081 15/04/13 07:07:22 INFO Worker: Connecting to master akka.tcp://sparkMaster@nceuhamnr08:7077/user/Master... 15/04/13 07:07:22 INFO Worker: Successfully registered with master spark://XXXX08:7077
*15/04/13 08:35:07 ERROR Worker: RECEIVED SIGNAL 15: SIGTERM*



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