java.io.IOException: sendMessageReliably failed without being ACK'd

data size: text file, 315G cmd: ./spark-submit --class com.spark.test.JavaWordCountWithSave --num-executors 7 --executor-memory 60g --driver-memory 2g --executor-cores 32 --master yarn-client /home/cjs/spark-test.jar hdfs://wordcount/input hdfs://wordcount/output code of JavaWordCountWithSave: `

java.util.concurrent.TimeoutException: Futures timed out after [10000 milliseconds]

submit 12 spark applications in the same time. yarn web page shows: two task fail. the cmd: ./spark-submit--class org.apache.spark.examples.JavaWordCount --master yarn-cluster ---executor-memory 2g ../lib/spark-examples_2.10-1.1.0.jar hdfs://hacluster/bigData driver log of one fa