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我已经在我的机器上安装并运行了 hadoop，我正在尝试运行 PEGASUS peta 规模的挖掘程序，但是当我做 make 时，有很多警告，以下是其中的一部分：

13/03/21 12:58:42 WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/hadoop/hadi_edge/catepillar_star.edge could only be replicated to 0 nodes, instead of 1
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696)
    at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1093)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)

    at org.apache.hadoop.ipc.Client.call(Client.java:1066)
    at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
    at $Proxy1.addBlock(Unknown Source)
    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:601)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
    at $Proxy1.addBlock(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3507)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3370)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2700(DFSClient.java:2586)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2826)

13/03/21 12:58:42 WARN hdfs.DFSClient: Error Recovery for block null bad datanode[0] nodes =
= null
13/03/21 12:58:42 WARN hdfs.DFSClient: Could not get block locations. Source file "/user/hadoop/hadi_edge/catepillar_star.edge" - Aborting...
put: java.io.IOException: File /user/hadoop/hadi_edge/catepillar_star.edge could only be replicated to 0 nodes, instead of 1
13/03/21 12:58:42 ERROR hdfs.DFSClient: Exception closing file /user/hadoop/hadi_edge/catepillar_star.edge : org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/hadoop/hadi_edge/catepillar_star.edge could only be replicated to 0 nodes, instead of 1
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696)
    at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1093)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)

org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/hadoop/hadi_edge/catepillar_star.edge could only be replicated to 0 nodes, instead of 1
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696)
    at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1093)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)

    at org.apache.hadoop.ipc.Client.call(Client.java:1066)
    at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
    at $Proxy1.addBlock(Unknown Source)
    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:601)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
    at $Proxy1.addBlock(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3507)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3370)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2700(DFSClient.java:2586)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2826)

我认为这是一个权限问题然后我尝试了 sudo make 然后我得到了以下错误：

Hadoop is not installed in the system.
Please install Hadoop and make sure the hadoop binary is accessible.
make: *** [demo_hadi] Error 127

当我打印我的 jps 时，Hadoop 已经安装：

hadoop@polaris:~/PEGASUS$ jps
7814 JobTracker
8061 TaskTracker
3799 FsShell
7718 SecondaryNameNode
9155 FsShell
8881 RunJar
7235 NameNode
6339 RunJar
9236 Jps

感谢您的时间，我真的很想知道出了什么问题！

4

1 回答 1

0

可见，Datanode 未在您的系统上启动（“只能复制到 0 个节点，而不是 1 个”的可能原因是相同的）

它有时会发生。

解决方案：停止所有 hadoop 守护程序并重新启动它们。查看是否所有 5 个守护进程都在运行（namenode、Secondary namenode、datanode、jobtracker、tasktracker）。

尝试运行一些示例代码来测试该框架是否运行良好。

如果上述解决方案不起作用，请重新启动机器。

如果问题仍然存在，请重新格式化 namenode（虽然不是一个很好的建议；应该保留为最后的解决方案）。

于 2013-03-21T07:46:44.190 回答