以Spark-Client模式運行，Spark-Submit時出現了下面的錯誤：
User: hadoop
Name: Spark Pi
Application Type: SPARK
Application Tags:
YarnApplicationState: FAILED
FinalStatus Reported by AM: FAILED
Started: 16-五月-2017 10:03:02
Elapsed: 14sec
Tracking URL: History
Diagnostics: Application application_1494900155967_0001 failed 2 times due to AM Container for appattempt_1494900155967_0001_000002 exited with exitCode: -103
For more detailed output, check application tracking page:http://master:8088/proxy/application_1494900155967_0001/Then, click on links to logs of each attempt.
Diagnostics: Container [pid=6263,containerID=container_1494900155967_0001_02_000001] is running beyond virtual memory limits. Current usage: 107.3 MB of 1 GB physical memory used; 2.2 GB of 2.1 GB virtual memory used. Killing container.
意思是說Container要用2.2GB的內存，而虛擬內存只有2.1GB，不夠用了，所以Kill了Container。
我的SPARK-EXECUTOR-MEMORY設置的是1G，即物理內存是1G，Yarn默認的虛擬內存和物理內存比例是2.1，也就是說虛擬內存是2.1G，小於了需要的內存2.2G。解決的辦法是把擬內存和物理內存比例增大，在yarn-site.xml中增加一個設置：
<property> <name>yarn.nodemanager.vmem-pmem-ratio</name> <value>2.5</value> </property>
再重啟Yarn，這樣一來就能有2.5G的虛擬內存，運行時就不會出錯了。