Recently, the distributed system has exploded again

Before the pseudo distributed system, hadoop-1.2.1, hadoop-2.5.2 are good, no problem

A fully distributed system would explode

This is wrong

17/09/02 04:18:53 WARN ssl.FileBasedKeyStoresFactory: The property ‘ssl.client.truststore.location’ has not been set, no TrustStore will be loaded
17/09/02 04:18:54 FATAL namenode.NameNode: Exception in namenode join
java.lang.IllegalArgumentException: URI has an authority component
at java.io.File.< init>( File. java:423 )
at org.apache.hadoop.hdfs.server.namenode.NNStorage.getStorageDirectory(NNStorage. java:327 )
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.initJournals(FSEditLog. java:261 )
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.initJournalsForWrite(FSEditLog. java:233 )
at org.apache.hadoop.hdfs.server .namenode.NameNode.format(NameNode. java:920 )
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode. java:1354 )
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode. java:1473 )
17/09/02 04:18:54 INFO util.ExitUtil: Exiting with status 1

Search everywhere, ask everywhere, and there is no solution, and the tutorial is right, and there is no problem. Journal node and zookeeper are started, but they can’t format the namenode, and they have a headache for two days. So they continue to compare, and find that there is a different place, which is a configuration in core-site.xml

My idea is this

< property>
< name> hadoop.tmp.dir</ name>
< value> file:/opt/data2/tmp</ value>
</ property>

And then it’s like this in the tutorial

< property>
< name> hadoop.tmp.dir</ name>
< value>/ usr/local/hadoop/tmp</ value>
</ property>

I don’t think it’s a problem. The pseudo distribution is good. Later, I wanted to delete this file to see if it would be better, so I deleted it, and then the namenode was formatted successfully

In summary, file: in pseudo distributed system, it can be added or not. In fully distributed system, it cannot be added

Summary: File: don’t write directly on the distributed system