I am running CDH-5.3.2-1.cdh5.3.2.p0.10 with ClouderaManager on Centos 6.6.
My HDFS service was working on a Cluster. But I wanted to change the mounting point for the hadoop data. Yet without success, so I came with the idea to rollback all changes, but the previous configuration doesnt work what is discouraging.
I have two nodes within the cluster. One node for data is bad DataNodes Health Bad.
In the log I have got a few errors
1:40:10.821 PM ERROR org.apache.hadoop.hdfs.server.common.Storage
It appears that another namenode 931@spark1.xxx.xx has already locked the storage directory
1:40:10.821 PM INFO org.apache.hadoop.hdfs.server.common.Storage
Cannot lock storage /dfs/nn. The directory is already locked
1:40:10.821 PM WARN org.apache.hadoop.hdfs.server.common.Storage
java.io.IOException: Cannot lock storage /dfs/nn. The directory is already locked
1:40:10.822 PM FATAL org.apache.hadoop.hdfs.server.datanode.DataNode
Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to spark1.xxx.xx/10.10.10.10:8022. Exiting.
java.io.IOException: All specified directories are failed to load.
at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:463)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1318)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1288)
at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:320)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:221)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:829)
at java.lang.Thread.run(Thread.java:745)
I have been trying many possible solutions but without any luck.
- formatting
hadoop namenode -format - stopping cluster and
rm -rf /dfs/*[and reformatting] - some adjustments to
/dfs/nn/current/VERSIONfile - removing
in_use.lockfile and starting only a lacking node - removing a file in
/tmp/hsperfdata_hdfs/with name like the pid locking the directory.
There are files in the directory
[root@spark1 dfs]# ll
total 8
drwxr-xr-x 3 hdfs hdfs 4096 Apr 28 13:39 nn
drwx------ 3 hdfs hadoop 4096 Apr 28 13:40 snn
There is no dn dir what is a bit interesting.
All operations on hdfs files I perform as an hdfs user.
In the file /etc/hadoop/conf/hdfs-site.xml there is
<property>
<name>dfs.namenode.name.dir</name>
<value>file:///dfs/nn</value>
</property>
