NiFi JoltTransformJSON

Question

NiFi在JOLT处理器中引发了一个错误-尽管“高级”处理器接口中的测试工作正常！

某些流文件已正确转换，但大多数失败，例如：

JSON：

{
    "abc": {
        "HEADER": {
            "A": "WDD2132041A2213962",
            "B": "75268508"
        },
        "BODY": {
            "C": "OK",
            "D": "1"
        },
        "ABCDEFG": "Time[s]   |  X  |  Y  |  Z  | A/B [%] | X/Y [%] "
    }
}

颠簸：

[
  {
    "operation": "shift",
    "spec": {
      "abc": {
        "HEADER": { "*": "&" },
        "SUMMARY": { "*": "&" },
        "*": { "$": "ITEM", "@": "VAL" }
      }
    }
  }
]

有人遇到过这种错误吗？

    2017-03-24 15:12:35,765 ERROR [Timer-Driven Process Thread-6] o.a.n.p.standard.JoltTransformJSON
java.lang.RuntimeException: Unable to load JSON object from InputStream.
        at com.bazaarvoice.jolt.JsonUtilImpl.jsonToObject(JsonUtilImpl.java:105) ~[json-utils-0.0.21.jar:0.0.21]
        at com.bazaarvoice.jolt.JsonUtils.jsonToObject(JsonUtils.java:117) ~[json-utils-0.0.21.jar:0.0.21]
        at org.apache.nifi.processors.standard.JoltTransformJSON.onTrigger(JoltTransformJSON.java:244) ~[nifi-standard-processors-1.1.0.2.1.1.0-2.jar:1.1.0.2.1.1.0-2]
        at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27) [nifi-api-1.1.0.2.1.1.0-2.jar:1.1.0.2.1.1.0-2]
        at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1099) [nifi-framework-core-1.1.0.2.1.1.0-2.jar:1.1.0.2.1.1.0-2]
        at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:136) [nifi-framework-core-1.1.0.2.1.1.0-2.jar:1.1.0.2.1.1.0-2]
        at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47) [nifi-framework-core-1.1.0.2.1.1.0-2.jar:1.1.0.2.1.1.0-2]
        at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:132) [nifi-framework-core-1.1.0.2.1.1.0-2.jar:1.1.0.2.1.1.0-2]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_77]
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [na:1.8.0_77]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_77]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [na:1.8.0_77]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_77]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_77]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_77]
Caused by: com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.ArrayIndexOutOfBoundsException) (through reference chain: java.util.LinkedHashMap["xml"])
        at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:210) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:177) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.fasterxml.jackson.databind.deser.std.ContainerDeserializerBase.wrapAndThrow(ContainerDeserializerBase.java:88) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.fasterxml.jackson.databind.deser.std.MapDeserializer._readAndBindStringMap(MapDeserializer.java:507) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:341) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:26) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.fasterxml.jackson.databind.deser.std.UntypedObjectDeserializer.deserialize(UntypedObjectDeserializer.java:220) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3702) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2784) ~[jackson-databind-2.6.1.jar:2.6.1]
        at com.bazaarvoice.jolt.JsonUtilImpl.jsonToObject(JsonUtilImpl.java:102) ~[json-utils-0.0.21.jar:0.0.21]
        ... 14 common frames omitted

Answer 1

我无法复制，但是我正在使用最新的源代码（有时将成为NiFi 1.2.0），该源代码对Jolt库进行了升级，并对JoltTransformJSON处理器进行了一些更改。 我粘贴了上面的JSON和规范，它转换良好。

是否使用Java默认值（通常为UTF-8）以外的字符集将JSON传递给JoltTransformJSON？ 如果是这样，请在JoltTransformJSON处理器之前尝试使用ConvertCharacterSet处理器。

Answer 2

像mattyb一样，我也尝试过此操作，并且也无法复制（使用最新来源）。 如果您能够捕获失败的内容并发布，以及所使用的NiFi版本，那么我至少可以重现问题并从那里进行调查。