Hey All, I'm able to start my master server, but none of the slave nodes come up (unless I list the master as the slave). After searching a bit, seems people have this problem when they forget to set df.default.name, but i've got it set in core-site.xml (listed below). They all have the error below on start up:
STARTUP_MSG: Starting DataNode STARTUP_MSG: host = slave1/192.168.0.234 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.20.0 STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.20 -r 763504; compiled by 'ndaley' on Thu Apr 9 05:18:40 UTC 2009 ************************************************************/ 2009-06-18 09:06:49,369 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.lang.NullPointerException at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:134) at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:156) at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:160) at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:246) at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:216) at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1283) at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1238) at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1246) at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1368) 2009-06-18 09:06:49,370 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down DataNode at slave1/192.168.0.234 ************************************************************/ ============================================== core-site.xml ============================================== <property> <name>fs.default.name</name> <value>hdfs://master:54310</value> <description>The name of the default file system. A URI whose scheme and authority determine the FileSystem implementation. The uri's scheme determines the config property (fs.SCHEME.impl) naming the FileSystem implementation class. The uri's authority is used to determine the host, port, etc. for a filesystem.</description> </property> <property> <name>hadoop.tmp.dir</name> <value>/data/hadoop-0.20.0-${user.name}</value> <description>A base for other temporary directories.</description> </property> -- View this message in context: http://www.nabble.com/Upgrading-from-.19-to-.20-problems-tp24095348p24095348.html Sent from the Hadoop core-user mailing list archive at Nabble.com.
