Yarn Nodemanager啓動不了報YarnRuntimeException: Failed to initialize container executor error=13 權限不夠

一、現象：有一個節點的NodeManager啓動不了。

　　後臺報錯日誌以下：

org.apache.hadoop.yarn.exceptions.YarnRuntimeException: Failed to initialize container executor
    at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:192)
    at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
    at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:425)
    at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:472)
Caused by: java.io.IOException: Cannot run program "/opt/hadoop-yarn/bin/container-executor": error=13, Permission denied
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
    at org.apache.hadoop.util.Shell.runCommand(Shell.java:485)
    at org.apache.hadoop.util.Shell.run(Shell.java:455)
    at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:702)
    at org.apache.hadoop.yarn.server.nodemanager.LinuxContainerExecutor.init(LinuxContainerExecutor.java:169)
    at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:190)
    ... 3 more
Caused by: java.io.IOException: error=13, Permission denied
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:186)
    at java.lang.ProcessImpl.start(ProcessImpl.java:130)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
    ... 8 more

二、container-executor的權限如圖所示：

  三、問題排查過程

　　yarn後臺運行的用戶是mr，可是其不在users組中，致使沒有權限報錯。

　　解決方法：將mr加到users用戶組中便可，爲了減少影響使用root用戶執行usermod -G users mr便可，此命令修改了mr用戶的附屬羣組。

其餘：

　　有多是其餘權限問題致使，解決方案參見：

　　https://blog.csdn.net/lsr40/article/details/79554901