最近在Yarn上使用Spark，不管是yarn-cluster模式还是yarn-client模式，都出现了以下的异常：

Application application_1434099279301_123706 failed 2 times due to AM Container for appattempt_1434099279301_123706_000002 exited with exitCode: 127 due to: Exception from container-launch:
org.apache.hadoop.util.Shell$ExitCodeException:
at org.apache.hadoop.util.Shell.runCommand(Shell.java:464)
at org.apache.hadoop.util.Shell.run(Shell.java:379)
at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:589)
at org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor.launchContainer(DefaultContainerExecutor.java:195)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:283)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call(ContainerLaunch.java:79)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Container exited with a non-zero exit code 127.Failing this attempt.. Failing the application.

　　而且ApplicationMaster所在机器的日志里面有下面的信息提示：

/bin/bash: {{JAVA_HOME}}/bin/java: No such file or directory

　　经过分析，原来是我编译Spark所使用的Hadoop版本和线上Hadoop版本不一致导致的，后来使用线上Hadoop版本重新编译了Spark，这个问题解决了。