java.util.ServiceConfigurationError: org.apache.nifi.authorization.Authorizer: Provider org.apache.nifi.authorization.FileAuthorizer could not be instantiated at java.util.ServiceLoader.fail(ServiceLoader.java:232) at java.util.ServiceLoader.access$100(ServiceLoader.java:185) at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384) at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404) at java.util.ServiceLoader$1.next(ServiceLoader.java:480) at org.apache.nifi.nar.ExtensionManager.a(ExtensionManager.java:142) at org.apache.nifi.nar.ExtensionManager.a(ExtensionManager.java:117) at org.apache.nifi.web.server.JettyServer.a(JettyServer.java:702) at org.apache.nifi.NiFi.<init>(NiFi.java:160) at org.apache.nifi.NiFi.main(NiFi.java:268) Caused by: java.lang.ExceptionInInitializerError: null at org.apache.nifi.authorization.FileAuthorizer.<init>(FileAuthorizer.java:43) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at java.lang.Class.newInstance(Class.java:442) at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380) ... 7 common frames omitted Caused by: java.lang.RuntimeException: Unable to create JAXBContext. at org.apache.nifi.authorization.FileUserGroupProvider.initializeJaxbContext(FileUserGroupProvider.java:95) at org.apache.nifi.authorization.FileUserGroupProvider.<clinit>(FileUserGroupProvider.java:85) ... 14 common frames omitted ... View more

I need to implement a functionality where I need to send those email which are failed and need to send maximum 5 time in case of failure but without using any processor, I just need a way in nifi where i can execute my code for sending emaila in a schedule way with some kind of background services. What technique i can use to do this . ... View more