Spark java.lang.OutOfMemoryError: Java heap space

Question

My cluster: 1 master, 11 slaves, each node has 6 GB memory.

My settings:

spark.executor.memory=4g, Dspark.akka.frameSize=512

Answer 1

Did you dump your master gc log? So I met similar issue and I found SPARK_DRIVER_MEMORY only set the Xmx heap. The initial heap size remains 1G and the heap size never scale up to the Xmx heap.

Passing "--conf "spark.driver.extraJavaOptions=-Xms20g" resolves my issue.

ps aux | grep java and the you'll see the follow log:=

24501 30.7 1.7 41782944 2318184 pts/0 Sl+ 18:49 0:33 /usr/java/latest/bin/java -cp /opt/spark/conf/:/opt/spark/jars/* -Xmx30g -Xms20g