我试图从spring管理员那里触发hadoopmapreduce作业,但出现以下错误。spring admin正在wasce上运行。
作业配置:
<hdp:configuration>
fs.defaultFS=hdfs://localhost:8020
mapred.job.tracker=localhost:8021
</hdp:configuration>
<hdp:job id="mr-my-job"
input-path="/data/input/"
output-path="/data/output/"
jar-by-class="org.test.Main"
mapper="org.test.Test1$Map"
combiner="org.test.Test1$Combiner"
reducer="org.test.Test1$ReduceFromCombiner" />
请给我建议。当我通过打包jar运行这个作业并使用hadoop命令运行时,它工作正常,但在通过admin运行时会出现错误。sudo-u hdfs hadoop jar test.jar org.main
Caused by: java.net.ConnectException: Call From <server>/<server_ip> to localhost:8021 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:783)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:730)
at org.apache.hadoop.ipc.Client.call(Client.java:1413)
at org.apache.hadoop.ipc.Client.call(Client.java:1362)
at org.apache.hadoop.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:231)
at org.apache.hadoop.mapred.$Proxy203.getStagingAreaDir(Unknown Source)
at org.apache.hadoop.mapred.JobClient.getStagingAreaDir(JobClient.java:1340)
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:102)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:954)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:948)
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:1548)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:948)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:582)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:612)
at org.springframework.data.hadoop.mapreduce.JobExecutor$2.run(JobExecutor.java:199)
... 24 more
Caused by: java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:493)
at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:604)
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:699)
at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:367)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1461)
at org.apache.hadoop.ipc.Client.call(Client.java:1380)
1条答案
按热度按时间smdncfj31#
我们有一个关于hadoop的特别页面。请按照您看到的堆栈跟踪中的链接进行操作:http://wiki.apache.org/hadoop/connectionrefused
我可以说我花了很多精力来改进连接诊断,包括目标主机和端口的报告、带有调试建议的url列表,以及这些页面的编写和维护。当人们不关注链接的时候,我总是很难过,因为我觉得我的努力已经白费了。请,当您在堆栈跟踪中看到这样的url时,请至少粗略地看一下引用的url。