Nifi JSON ETL：在JoltTransformJSON处理器中找不到自定义转换类

Question

我想使用实现com.bazaarvoice.jolt.Transform接口的自定义JSON转换。

我这样使用“自定义转换类名称”和“自定义模块目录”：

但是，我无法让JoltTransformJSON处理器使用它；我收到ClassNotFoundException：

2019-04-01 14:30:54,196 ERROR [Timer-Driven Process Thread-4] o.a.n.p.standard.JoltTransformJSON JoltTransformJSON[id=b407714f-0169-1000-d9b2-1709069238d7] Unable to transform StandardFlowFileRecord[uuid=72dc471b-c587-4da9-b54c-eb46247b0cf4,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1554129053747-21203, container=default, section=723], offset=607170, length=5363],offset=0,name=72dc471b-c587-4da9-b54c-eb46247b0cf4,size=5363] due to java.util.concurrent.CompletionException: java.lang.ClassNotFoundException: org.sentilo.nifi.elasticsearch.ElasticsearchToOpenTSDB: java.util.concurrent.CompletionException: java.lang.ClassNotFoundException: org.sentilo.nifi.elasticsearch.ElasticsearchToOpenTSDB
java.util.concurrent.CompletionException: java.lang.ClassNotFoundException: org.sentilo.nifi.elasticsearch.ElasticsearchToOpenTSDB
        at com.github.benmanes.caffeine.cache.BoundedLocalCache$BoundedLocalLoadingCache.lambda$new$0(BoundedLocalCache.java:3373)
        at com.github.benmanes.caffeine.cache.BoundedLocalCache.lambda$doComputeIfAbsent$14(BoundedLocalCache.java:2039)
        at java.util.concurrent.ConcurrentHashMap.compute(ConcurrentHashMap.java:1853)
        at com.github.benmanes.caffeine.cache.BoundedLocalCache.doComputeIfAbsent(BoundedLocalCache.java:2037)
        at com.github.benmanes.caffeine.cache.BoundedLocalCache.computeIfAbsent(BoundedLocalCache.java:2020)
        at com.github.benmanes.caffeine.cache.LocalCache.computeIfAbsent(LocalCache.java:112)
        at com.github.benmanes.caffeine.cache.LocalLoadingCache.get(LocalLoadingCache.java:67)
        at org.apache.nifi.processors.standard.JoltTransformJSON.getTransform(JoltTransformJSON.java:316)
        at org.apache.nifi.processors.standard.JoltTransformJSON.onTrigger(JoltTransformJSON.java:277)
        at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
        at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1162)
        at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:205)
        at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: org.sentilo.nifi.elasticsearch.ElasticsearchToOpenTSDB
        at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at org.apache.nifi.processors.standard.util.jolt.TransformFactory.getCustomTransform(TransformFactory.java:65)
        at org.apache.nifi.processors.standard.JoltTransformJSON.createTransform(JoltTransformJSON.java:346)
        at org.apache.nifi.processors.standard.JoltTransformJSON.lambda$setup$0(JoltTransformJSON.java:324)
        at com.github.benmanes.caffeine.cache.BoundedLocalCache$BoundedLocalLoadingCache.lambda$new$0(BoundedLocalCache.java:3366)
        ... 19 common frames omitted

我编译了该类及其所有依赖项，并将其放在目录“ /data/bin/nifi-1.9.1/jolt_modules”中。 目录和jar可读。

我也曾尝试将类名添加到规范中的操作中，如here所示，但是我似乎是出于某些原因没有作用的“自定义模块目录” ...

Answer 1

该问题尚未解决，已被记录为错误报告。最新状态可以在这里查看：

https://issues.apache.org/jira/browse/NIFI-6213