hadoop on windows with Eclipse
http://ebiquity.umbc.edu/Tutorials/Hadoop/00%20-%20Intro.html
|
hadoop无法正常启动(1) 执行 $ bin/hadoop start-all.sh之后,无法启动. 异常一
Exception in thread "main" java.lang.IllegalArgumentException: Invalid URI for NameNode address (check fs.defaultFS): file:/// has no authority. localhost: at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:214) localhost: at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.initialize(SecondaryNameNode.java:135) localhost: at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.<init>(SecondaryNameNode.java:119) localhost: at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.main(SecondaryNameNode.java:481)
解决方法：
此时是没有配置conf/mapred-site.xml的缘故. 在0.21.0版本上是配置mapred-site.xml,在之前的版本是配置core-site.xml,0.20.2版本中配置mapred-site.xml无效,只能配置core-site.xml文件
<configuration> <property> <name>fs.default.name</name> <value>hdfs://localhost:9000</value> </property> <property> <name>mapred.job.tracker</name> <value>hdfs://localhost:9001</value> </property> <property> <name>dfs.replication</name> <value>1</value> </property> </configuration>
hadoop无法正常启动(2) 异常二、
starting namenode, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-namenode-aist.out localhost: starting datanode, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-datanode-aist.out localhost: starting secondarynamenode, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-secondarynamenode-aist.out localhost: Exception in thread "main" java.lang.NullPointerException localhost: at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:134) localhost: at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:156) localhost: at org.apache.hadoop.hdfs.server.namenode.NameNode.getAddress(NameNode.java:160) localhost: at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.initialize(SecondaryNameNode.java:131) localhost: at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.<init>(SecondaryNameNode.java:115) localhost: at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.main(SecondaryNameNode.java:469) starting jobtracker, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-jobtracker-aist.out localhost: starting tasktracker, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-tasktracker-aist.out
解决方法： 同上
hadoop无法正常启动(3) 异常三、
starting namenode, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-namenode-aist.out localhost: starting datanode, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-datanode-aist.out localhost: Error: JAVA_HOME is not set. localhost: starting secondarynamenode, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-secondarynamenode-aist.out localhost: Error: JAVA_HOME is not set. starting jobtracker, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-jobtracker-aist.out localhost: starting tasktracker, logging to /home/xixitie/hadoop/bin/../logs/hadoop-root-tasktracker-aist.out localhost: Error: JAVA_HOME is not set.
解决方法: 请在$hadoop/conf/hadoop-env.sh文件中配置JDK的环境变量
export JAVA_HOME=/home/xixitie/jdk export CLASSPATH=$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
hadoop无法正常启动(4)
异常四:mapred-site.xml配置中使用hdfs://localhost:9001，而不使用localhost:9001的配置 异常信息如下： 11/04/20 23:33:25 INFO security.Groups: Group mapping impl=org.apache.hadoop.sec urity.ShellBasedUnixGroupsMapping; cacheTimeout=300000 11/04/20 23:33:25 WARN fs.FileSystem: "localhost:9000" is a deprecated filesyste m name. Use "hdfs://localhost:9000/" instead. 11/04/20 23:33:25 WARN conf.Configuration: mapred.task.id is deprecated. Instead , use mapreduce.task.attempt.id 11/04/20 23:33:25 WARN fs.FileSystem: "localhost:9000" is a deprecated filesyste m name. Use "hdfs://localhost:9000/" instead. 11/04/20 23:33:25 WARN fs.FileSystem: "localhost:9000" is a deprecated filesyste m name. Use "hdfs://localhost:9000/" instead.
解决方法： mapred-site.xml配置中使用hdfs://localhost:9000，而不使用localhost:9000的配置
<property> <name>fs.default.name</name> <value>hdfs://localhost:9000</value> </property> <property> <name>mapred.job.tracker</name> <value>hdfs://localhost:9001</value> </property>
hadoop无法正常启动(5) 异常五、no namenode to stop 问题的解决: 异常信息如下：11/04/20 21:48:50 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 0 time(s). 11/04/20 21:48:51 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 1 time(s). 11/04/20 21:48:52 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 2 time(s). 11/04/20 21:48:53 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 3 time(s). 11/04/20 21:48:54 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 4 time(s). 11/04/20 21:48:55 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 5 time(s). 11/04/20 21:48:56 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 6 time(s). 11/04/20 21:48:57 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 7 time(s). 11/04/20 21:48:58 INFO ipc.Client: Retrying connect to server: localhost/127.0.0 .1:9000. Already tried 8 time(s).
解决方法: 这个问题是由namenode没有启动起来引起的,为什么no namenode to stop,可能之前的一些数据对namenode有影响, $ bin/hadoop namenode -format $bin/hadoop start-all.sh
hadoop无法正常启动(6) 异常五、no datanode to stop 问题的解决: 有时数据结构出现问题会产生无法启动datanode的问题。 然后用 hadoop namenode -format 重新格式化后仍然无效，/tmp中的文件并没有清楚。 其实还需要清除/tmp/hadoop*里的文件。
hadoop fs -rmr /tmp
stop-all.sh
rm -rf /tmp/hadoop*
hadoop namenode -format
start-all.sh
搞了好几天终于把window下hadoop配置给搞好了，真不是搞技术的料啊！！！！ |