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hadoop無法正常啟動(1) 執(zhí)行 $ bin/hadoop start-all.sh之后,無法啟動. 異常一 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) 解決方法：此時(shí)是沒有配置conf/mapred-site.xml的緣故. 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無效,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無法正常啟動(2) 異常二、 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 解決方法：此時(shí)是沒有配置conf/mapred-site.xml的緣故. 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無效,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無法正常啟動(3) 異常三、 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.
解決方法: 請?jiān)?hadoop/conf/hadoop-env.sh文件中配置JDK的環(huán)境變量 JAVA_HOME=/home/xixitie/jdk CLASSPATH=$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export JAVA_HOME CLASSPATH hadoop無法正常啟動(4) 異常四:mapred-site.xml配置中使用hdfs://localhost:9001，而不使用localhost:9001的配置 異常信息如下： 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.
解決方法： 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無法正常啟動(5) 異常五、no namenode to stop 問題的解決: 異常信息如下：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).
解決方法: 這個問題是由namenode沒有啟動起來引起的,為什么no namenode to stop,可能之前的一些數(shù)據(jù)對namenode有影響, 你需要執(zhí)行: $ bin/hadoop namenode -format 然后 $bin/hadoop start-all.sh hadoop無法正常啟動(6) 異常五、no datanode to stop 問題的解決: 有時(shí)數(shù)據(jù)結(jié)構(gòu)出現(xiàn)問題會產(chǎn)生無法啟動datanode的問題。 然后用 hadoop namenode -format 重新格式化后仍然無效，/tmp中的文件并沒有清楚。 其實(shí)還需要清除/tmp/hadoop*里的文件。 執(zhí)行步驟： 一、先刪除hadoop:///tmp hadoop fs -rmr /tmp 二、停止 hadoop stop-all.sh 三、刪除/tmp/hadoop* rm -rf /tmp/hadoop* 四、格式化hadoop hadoop namenode -format 五、啟動hadoop start-all.sh 之后即可解決這個datanode沒法啟動的問題 |
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