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hadoop - 运行 NiFi 所需的 Hadoop 配置是什么？

问题描述

我们已经将 nifi（HDF 服务）安装到我们现有的 HDP 中。安装成功，我可以运行 nifi 没有任何错误。但是我在 PutHDFS 中遇到了一个问题

2018-06-20 12:00:14,246 WARN [StandardProcessScheduler Thread-6] org.apache.hadoop.conf.Configuration /tmp/core-site.xml:an attempt to override final parameter: fs.defaultFS;  Ignoring.
2018-06-20 12:00:14,248 ERROR [StandardProcessScheduler Thread-6] o.apache.nifi.processors.hadoop.PutHDFS PutHDFS[id=11a40827-0164-1000-ffff-ffffb07a04d9] HDFS Configuration error - java.net.ConnectException: Connection refused: {}
java.net.ConnectException: Connection refused
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
        at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:531)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:495)
        at org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.checkHdfsUriForTimeout(AbstractHadoopProcessor.java:345)
        at org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.resetHDFSResources(AbstractHadoopProcessor.java:260)
        at org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.abstractOnScheduled(AbstractHadoopProcessor.java:205)
        at sun.reflect.GeneratedMethodAccessor728.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:137)
        at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:125)
        at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:70)
        at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotation(ReflectionUtils.java:47)
        at org.apache.nifi.controller.StandardProcessorNode$1.call(StandardProcessorNode.java:1334)
        at org.apache.nifi.controller.StandardProcessorNode$1.call(StandardProcessorNode.java:1330)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
2018-06-20 12:00:14,248 ERROR [StandardProcessScheduler Thread-6] org.apache.nifi.engine.FlowEngine A flow controller task execution stopped abnormally
java.util.concurrent.ExecutionException: java.lang.reflect.InvocationTargetException
        at java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.util.concurrent.FutureTask.get(FutureTask.java:192)
        at org.apache.nifi.engine.FlowEngine.afterExecute(FlowEngine.java:100)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1150)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException: null

我也附上了截图。

PutHDFS

配置

标签： hadoophadoop2apache-nifihadoop-streamingdataflow

解决方案

正如@BryanBende 所说，你得到一个java.net.ConnectException：连接被拒绝，所以它似乎与Hadoop机器中的安全配置有关，与NiFi本身无关，尝试连接Hadoop客户端。

有关此类错误的信息：

Hadoop 集群设置 - java.net.ConnectException：连接被拒绝

https://wiki.apache.org/hadoop/ConnectionRefused

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