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Allen Wittenauer resolved HADOOP-6806. -------------------------------------- Resolution: Cannot Reproduce > While running HADOOP "Exception in thread "main" > java.lang.NullPointerException " occurs > ---------------------------------------------------------------------------------------- > > Key: HADOOP-6806 > URL: https://issues.apache.org/jira/browse/HADOOP-6806 > Project: Hadoop Common > Issue Type: Task > Environment: CentOS 5.0 > Reporter: GIRISH N IYER > > hi, > while installin hadoop ... i can do the following step > "bin/hadoop namenode -format"...it got success > After when i do > "bin/start-all.sh"....the following error occurs........ > starting namenode, logging to > /hadoop/hadoop/bin/../logs/hadoop-hadoop-namenode-localhost.localdomain.out > localhost: ssh: localhost: Name or service not known > hadoop@master's password: > master: starting secondarynamenode, logging to > /hadoop/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-localhost.localdomain.out > master: Exception in thread "main" java.lang.NullPointerException > master: at > org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:134) > master: at > org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:156) > master: at > org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:160) > master: at > org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.initialize(SecondaryNameNode.java:131) > master: at > org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.<init>(SecondaryNameNode.java:115) > master: at > org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.main(SecondaryNameNode.java:469) > starting jobtracker, logging to > /hadoop/hadoop/bin/../logs/hadoop-hadoop-jobtracker-localhost.localdomain.out > localhost: ssh: localhost: Name or service not known > Pls help me to solve this........ > Also i did not configure > "nano conf/core-site.xml" > "nano conf/hdfs-site.xml" > "nano conf/mapred-site.xml" -- This message was sent by Atlassian JIRA (v6.2#6252)