NiFi - java.lang.NoSuchMethodError

1
votes

I am seeing some weird error in my nifi cluster, i have a 3node secured nifi cluster and we have some custom library nars when we deploying in all nodes 2 nodes starting up without any issues but in one node i am seeing the below errors.

2017-04-20 23:43:34,516 ERROR [main] org.apache.nifi.NiFi Failure to launch NiFi due to java.lang.NoSuchMethodError: org.apache.nifi.processor.util.StandardValidators.createControllerServiceExistsValidator(Ljava/lang/Class;)Lorg/apache/nifi/components/Validator;
java.lang.NoSuchMethodError: org.apache.nifi.processor.util.StandardValidators.createControllerServiceExistsValidator(Ljava/lang/Class;)Lorg/apache/nifi/components/Validator;
1
apache-nifi
Usually this means there are multiple conflicting versions of the same class on the classpath, have you added any JARs directly to NiFi's lib directory? - Bryan Bende
You also may want to check what is bundled in your custom NAR by looking at work/nar/extensions/<your-nar>/META-INF/bundled-dependencies/ and make sure you are not bundling nifi-api - Bryan Bende
@BryanBende Thanks for the reply.yes i have added in default lib dir. is there any way to deploy custom libs. - Anish Kumar
You should only be deploying a NAR file to the lib directory (not other JARs), the NAR should then bundle all the JARs it needs. Is that what you currently have? - Bryan Bende
sorry for the confusion i have added custom Nars to default lib directory not JARS. after adding custom Nars only i am facing this issue. and i have checked the below path its not bundling anythig related to api. work/nar/extensions/<your-nar>/META-INF/bundled-dependencies‌​/ - Anish Kumar

1 Answers

2
votes

Did you try deleting nar/ folder under work/ directory ,add your nars to lib/ and restart NiFi ? Usually, NiFi expands the nar bundles during start up.

Also, are you extending any standard processors to build a custom NiFi processor ? In such case you might have to add a nar dependency.