NiFi写入HDFS错误：java.lang.IllegalArgumentException：无法从空字符串创建路径

Question

NiFi写入HDFS时遇到问题。我遇到错误：

     ERROR [Timer-Driven Process Thread-10] o.apache.nifi.processors.hadoop.PutHDFS PutHDFS[id=4af43efa-a8ff-18ac-0000-00002377fba5] Failed to properly initialize Processor. If still scheduled to run, NiFi will attempt to initialize and run the Processor again after the 'Administrative Yield Duration' has elapsed. Failure is due to java.lang.reflect.InvocationTargetException: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException: null
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        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.lambda$initiateStart$1(StandardProcessorNode.java:1364)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ScheduledThreadPoolExecutor$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)
Caused by: java.lang.IllegalArgumentException: Can not create a Path from an empty string
        at org.apache.hadoop.fs.Path.checkPathArg(Path.java:126)
        at org.apache.hadoop.fs.Path.<init>(Path.java:134)
        at org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.getConfigurationFromResources(AbstractHadoopProcessor.java:225)
        at org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.resetHDFSResources(AbstractHadoopProcessor.java:254)
        at org.apache.nifi.processors.hadoop.AbstractHadoopProcessor.abstractOnScheduled(AbstractHadoopProcessor.java:205)
        ... 15 common frames omitted

我的HDFS配置是：

注意：在PutFile上应用了相同的配置，并且运行良好（Kafka.topic不为空）

Answer 1

似乎当 return current_health 处理器试图保存文件时，它正在寻找与PutHDFS关联的kafka.topic属性，但该属性没有任何价值。

请确保您具有与flowfile相关联的 kafka.topic 属性，我们可以在 some value <之前使用UpdataAttribute处理器/ strong>添加属性。