Failed to start NodeManager caused by "/var/lib/hadoop-yarn/yarn-nm-recovery/yarn-nm-state/LOCK: Per

 

Hadoop 安裝步驟：
0. 安裝前準備（節點機器，環境設置，yum源設置）
1. 配置並安裝Cloudera-Manager
2. 啓動 CM 服務
3. 安裝CDH，並配置集羣
4. 啓動

在啓動Yarn時， NodeManager 啓動失敗。接下來查看對應的日誌：Cloudera Manager 主頁，點擊YARN項操做，選擇「實例」，點擊角色類型，進入NodeManager 主頁，在日誌文件下拉框有stdout,stderr,角色日誌文件，建議查看角色日誌文件。

 下面是角色日誌文件的輸出內容

Error starting NodeManager
org.apache.hadoop.service.ServiceStateException: org.fusesource.leveldbjni.internal.NativeDB$DBException: IO error: /var/lib/hadoop-yarn/yarn-nm-recovery/yarn-nm-state/LOCK: Permission denied
	at org.apache.hadoop.service.ServiceStateException.convert(ServiceStateException.java:59)
	at org.apache.hadoop.service.AbstractService.init(AbstractService.java:172)
	at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartRecoveryStore(NodeManager.java:181)
	at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:245)
	at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
	at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:562)
	at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:609)
Caused by: org.fusesource.leveldbjni.internal.NativeDB$DBException: IO error: /var/lib/hadoop-yarn/yarn-nm-recovery/yarn-nm-state/LOCK: Permission denied
	at org.fusesource.leveldbjni.internal.NativeDB.checkStatus(NativeDB.java:200)
	at org.fusesource.leveldbjni.internal.NativeDB.open(NativeDB.java:218)
	at org.fusesource.leveldbjni.JniDBFactory.open(JniDBFactory.java:168)
	at org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.openDatabase(NMLeveldbStateStoreService.java:944)
	at org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.initStorage(NMLeveldbStateStoreService.java:931)
	at org.apache.hadoop.yarn.server.nodemanager.recovery.NMStateStoreService.serviceInit(NMStateStoreService.java:204)
	at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
	... 5 more

　　

經過網絡查看不僅人遇到過這樣的問題

login the related node server, check the permission and ownership of those directories  /var/lib/hadoop-*,  I got the following info

[root@elephant lib]# ls -l | grep -i hadoop
d---------. 2 root         root            6 Nov 25 05:27 hadoop-hdfs
d---------. 2 root         root            6 Nov 25 05:27 hadoop-httpfs
d---------. 2 root         root            6 Nov 25 05:27 hadoop-kms
d---------. 2 root         root            6 Nov 25 05:27 hadoop-mapreduce
d---------. 3 root         root           29 Nov 25 06:44 hadoop-yarn

　　

they are not right. so we need to do the following steps to fix it

chown  -R hdfs:hdfs /var/lib/hadoop-hdfs
chown  -R httpfs.httpfs /var/lib/hadoop-httpfs
chown  -R kms.kms /var/lib/hadoop-kms
chown  -R mapred:mapred /var/lib/hadoop-mapreduce
chown  -R yarn:yarn /var/lib/hadoop-yarn

chmod -R 755 /var/lib/hadoop-*

　　

then try to start the node manager, it succeed.

Cheers!!!