CODEWITHSUNDEEP
hadoophdfs
abipc
abipc

Reputation: 1035

HDFS - Namenode not starting

Has anyone encountered this before. I am trying to restart the namenode through Ambari dashboard. 

2016-11-27 19:24:09,588 ERROR namenode.NameNode (NameNode.java:main(1712)) - Failed to start namenode.
    java.io.IOException: Multiple shared edits directories are not yet supported
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNamespaceEditsDirs(FSNamesystem.java:1429)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNamespaceEditsDirs(FSNamesystem.java:1414)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkConfiguration(FSNamesystem.java:624)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:676)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:662)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:722)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:951)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:935)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1641)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1707)

Upvotes: 3

Views: 1846

Answers (2)

M. Patton
M. Patton

Reputation: 75

I think this should be more of a comment, but I don't have enough reputation for that. To perhaps save the next person some time, in the <value> of the dfs.namenode.shared.edits.dir config key, be sure that the host:port listing of the JournalNodes is separated by semicolons, NOT COMMAS. Even after seeing the answer above, my eyes kept glossing over the delimiters and I spent way more time on this problem than I should have.

Upvotes: 1

Kai Sasaki
Kai Sasaki

Reputation: 687

java.io.IOException: Multiple shared edits directories are not yet supported is thrown when dfs.namenode.shared.edits.dir has multiple entries. Could you check thie configuration is correct? dfs.namenode.shared.edits.dir is not necessary unless you are trying to launch HA NameNode cluster.

If you are using QJM, official documentation can be a help. We need to write set value like this.

<property>
  <name>dfs.namenode.shared.edits.dir</name>
  <value>qjournal://node1.example.com:8485;node2.example.com:8485;node3.example.com:8485/mycluster</value>
</property>

Upvotes: 1

Related Questions