我已经在macosx中设置了hadoop框架。使用virtualbox，我安装了ubuntu服务器（一个namenode）和另外两个ubuntu服务器作为datanode。据我所知，我已经正确地设置了core-site.xml和其他配置。当我使用start-all.sh启动框架时，一切看起来都很好。做 jps 在namenode和每个datanodes上显示进程处于活动状态。但是在guiurl上，我看到没有节点是活动的。请参见所附图像。以下是来自日志文件的错误消息：
2014-06-23 18:00:01,167 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: Web-server up at: 0.0.0.0:50070
2014-06-23 18:00:01,174 INFO org.apache.hadoop.ipc.Server: IPC Server Responder: starting
2014-06-23 18:00:01,175 INFO org.apache.hadoop.ipc.Server: IPC Server listener on 10001: starting
2014-06-23 18:00:01,178 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 10001: starting
2014-06-23 18:00:01,186 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on 10001: starting
2014-06-23 18:00:01,190 INFO org.apache.hadoop.ipc.Server: IPC Server handler 2 on 10001: starting
2014-06-23 18:00:01,195 INFO org.apache.hadoop.ipc.Server: IPC Server handler 3 on 10001: starting
2014-06-23 18:00:01,195 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on 10001: starting
2014-06-23 18:00:01,196 INFO org.apache.hadoop.ipc.Server: IPC Server handler 5 on 10001: starting
2014-06-23 18:00:01,198 INFO org.apache.hadoop.ipc.Server: IPC Server handler 6 on 10001: starting
2014-06-23 18:00:01,201 INFO org.apache.hadoop.ipc.Server: IPC Server handler 7 on 10001: starting
2014-06-23 18:00:01,206 INFO org.apache.hadoop.ipc.Server: IPC Server handler 8 on 10001: starting
2014-06-23 18:00:01,213 INFO org.apache.hadoop.ipc.Server: IPC Server handler 9 on 10001: starting
2014-06-23 18:00:05,692 ERROR org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:sridhar cause:java.io.IOException: File /usr/local/hadoop/tmp/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1
2014-06-23 18:00:05,692 INFO org.apache.hadoop.ipc.Server: IPC Server handler 4 on 10001, call addBlock(/usr/local/hadoop/tmp/mapred/system/jobtracker.info, DFSClient_NONMAPREDUCE_1288778011_1, null) from 127.0.0.1:56524: error: java.io.IOException: File /usr/local/hadoop/tmp/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1
java.io.IOException: File /usr/local/hadoop/tmp/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1920)
at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:783)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:587)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1432)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1428)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1426)
2014-06-23 18:00:06,716 ERROR org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:sridhar cause:java.io.IOException: File /usr/local/hadoop/tmp/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1
2014-06-23 18:00:06,716 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 10001, call addBlock(/usr/local/hadoop/tmp/mapred/system/jobtracker.info, DFSClient_NONMAPREDUCE_1288778011_1, null) from 127.0.0.1:56524: error: java.io.IOException: File /usr/local/hadoop/tmp/mapred/system/jobtracker.info could only be replicated to 0 nodes, instead of 1
附言：我确实找过其他显示类似错误的帖子。我试过了。但并不成功
编辑：
namenode服务器在发出命令时不显示datanodes和tasktracker jps 命令。datanode上的日志如下所示：（可能datanode没有建立连接） 2014-06-23 17:14:16,003 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: ubuntuhadoop/69.91.135.178:10001. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS) 2014-06-23 17:14:17,005 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: ubuntuhadoop/69.91.135.178:10001. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS) 2014-06-23 17:14:18,006 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: ubuntuhadoop/69.91.135.178:10001. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2条答案
按热度按时间0ejtzxu11#
我要把它弄出来。尽管这个解决方案很简单，但我还是想在这里发布，以便其他hadoop新手能够从中受益。
1） 拥有
core-site.xml,hdfs-site.xml以及mapred-site.xml在两个主(nameNode)所有的奴隶(dataNodes). 我想core-site.xml以及mapred-site.xml在主人那里并不重要。但确实如此。他们打开听音乐的端口。在这些港口，dataNode可以达到nameNode.2） 当你跑的时候
jps在master上，您将不会看到一个进程（至少我没有看到）DataNodes以及TaskTracker假设你做了start-all.sh从主人那里。原因是datanodes和tasktrackers线程是在集群的不同节点上处理的（在我的例子中，我有一个ubuntu框作为master，两个ubuntu框作为datanodes）。注意：在我的例子中，我没有让我的主节点充当datanode（即从节点）
cgfeq70w2#
从日志中可以看出，主节点无法连接其中一个数据节点（ubuntuhadoop/69.91.135.178:10001）。
作为初始测试，请使用ssh从主节点连接到数据节点，并查看是否可以与其连接。下面的链接可能有助于设置集群！！
http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-multi-node-cluster/