joewitt commented on PR #7808:
URL: https://github.com/apache/nifi/pull/7808#issuecomment-1739593756
```
2023-09-28 15:49:19,719 WARN [Validate Components Thread-5]
o.a.n.p.processor.FlowFileTransformProxy
PythonProcessor[type=UpdateAttributeFileLookup,
id=27713616-6905-161e-4be9-ce149d02e0a0] Failed to obtain list of Property
Descriptors from Python processor
PythonProcessor[type=UpdateAttributeFileLookup,
id=27713616-6905-161e-4be9-ce149d02e0a0]; returning cached list
py4j.Py4JException: Cannot obtain a new communication channel
at py4j.CallbackClient.sendCommand(CallbackClient.java:380)
at py4j.CallbackClient.sendCommand(CallbackClient.java:356)
at
org.apache.nifi.py4j.client.PythonProxyInvocationHandler.invoke(PythonProxyInvocationHandler.java:63)
at
org.apache.nifi.py4j.client.NiFiPythonGateway$1.invoke(NiFiPythonGateway.java:125)
at
jdk.proxy8/jdk.proxy8.$Proxy108.getSupportedPropertyDescriptors(Unknown Source)
at
org.apache.nifi.python.processor.PythonProcessorProxy.getSupportedPropertyDescriptors(PythonProcessorProxy.java:69)
at
org.apache.nifi.components.AbstractConfigurableComponent.getSupportedPropertyDescriptor(AbstractConfigurableComponent.java:78)
at
org.apache.nifi.components.AbstractConfigurableComponent.getPropertyDescriptor(AbstractConfigurableComponent.java:61)
at
org.apache.nifi.components.AbstractConfigurableComponent.getPropertyDescriptor(AbstractConfigurableComponent.java:56)
at
org.apache.nifi.controller.AbstractComponentNode.getPropertyDescriptor(AbstractComponentNode.java:1068)
at
org.apache.nifi.controller.AbstractComponentNode.lambda$getProperties$6(AbstractComponentNode.java:562)
at
java.base/java.util.concurrent.ConcurrentHashMap.forEach(ConcurrentHashMap.java:1603)
at
org.apache.nifi.controller.AbstractComponentNode.getProperties(AbstractComponentNode.java:562)
at
org.apache.nifi.registry.flow.mapping.NiFiRegistryFlowMapper.mapPropertyDescriptors(NiFiRegistryFlowMapper.java:597)
at
org.apache.nifi.registry.flow.mapping.NiFiRegistryFlowMapper.mapProcessor(NiFiRegistryFlowMapper.java:764)
at
org.apache.nifi.flowanalysis.StandardFlowAnalyzer.analyzeProcessor(StandardFlowAnalyzer.java:81)
at
org.apache.nifi.controller.ProcessorNode.lambda$performFlowAnalysisOnThis$0(ProcessorNode.java:290)
at java.base/java.util.Optional.ifPresent(Optional.java:178)
at
org.apache.nifi.controller.ProcessorNode.performFlowAnalysisOnThis(ProcessorNode.java:290)
at
org.apache.nifi.controller.AbstractComponentNode.computeValidationErrors(AbstractComponentNode.java:790)
at
org.apache.nifi.controller.StandardProcessorNode.computeValidationErrors(StandardProcessorNode.java:1128)
at
org.apache.nifi.controller.AbstractComponentNode.performValidation(AbstractComponentNode.java:737)
at
org.apache.nifi.controller.AbstractComponentNode.performValidation(AbstractComponentNode.java:751)
at
org.apache.nifi.components.validation.StandardValidationTrigger.trigger(StandardValidationTrigger.java:52)
at
org.apache.nifi.components.validation.StandardValidationTrigger.lambda$triggerAsync$0(StandardValidationTrigger.java:45)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1583)
2023-09-28 15:49:19,719 WARN [Validate Components Thread-5]
o.a.n.p.processor.FlowFileTransformProxy
PythonProcessor[type=UpdateAttributeFileLookup,
id=27713616-6905-161e-4be9-ce149d02e0a0] Failed to obtain list of Relationships
from Python Processor PythonProcessor[type=UpdateAttributeFileLookup,
id=27713616-6905-161e-4be9-ce149d02e0a0]; assuming no explicit relationships
py4j.Py4JException: Cannot obtain a new communication channel
at py4j.CallbackClient.sendCommand(CallbackClient.java:380)
at py4j.CallbackClient.sendCommand(CallbackClient.java:356)
at
org.apache.nifi.py4j.client.PythonProxyInvocationHandler.invoke(PythonProxyInvocationHandler.java:63)
at
org.apache.nifi.py4j.client.NiFiPythonGateway$1.invoke(NiFiPythonGateway.java:125)
at jdk.proxy8/jdk.proxy8.$Proxy108.getRelationships(Unknown Source)
at
org.apache.nifi.python.processor.PythonProcessorProxy.fetchRelationshipsFromPythonProcessor(PythonProcessorProxy.java:164)
at
org.apache.nifi.python.processor.PythonProcessorProxy.getRelationships(PythonProcessorProxy.java:158)
at
org.apache.nifi.controller.StandardProcessorNode.getUndefinedRelationships(StandardProcessorNode.java:961)
at
org.apache.nifi.controller.StandardProcessorNode.computeValidationErrors(StandardProcessorNode.java:1136)
at
org.apache.nifi.controller.AbstractComponentNode.performValidation(AbstractComponentNode.java:737)
at
org.apache.nifi.controller.AbstractComponentNode.performValidation(AbstractComponentNode.java:751)
at
org.apache.nifi.components.validation.StandardValidationTrigger.trigger(StandardValidationTrigger.java:52)
at
org.apache.nifi.components.validation.StandardValidationTrigger.lambda$triggerAsync$0(StandardValidationTrigger.java:45)
at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1583)
```
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