I added the StandardValidators reference back in and the original error
reoccurs. The offending code (which compiles fine using the same JDK) is
totally standard stuff:
public static final PropertyDescriptor ID_PATH = new PropertyDescriptor
.Builder().name("ID_PATH")
.displayName("JSON ID Path")
.description("The path to the JSON attribute that represents the
unique ID for the object")
.addValidator(StandardValidators.NON_BLANK_VALIDATOR)
.required(true)
.build();
2017-11-07 04:13:46,855 ERROR [main] org.apache.nifi.NiFi Failure to launch
NiFi due to java.util.ServiceConfigurationError:
org.apache.nifi.processor.Processor: Provider
com.jidmu.processors.JSONCondenser.JSONCondenser could not be instantiated
java.util.ServiceConfigurationError: org.apache.nifi.processor.Processor:
Provider com.jidmu.processors.JSONCondenser.JSONCondenser 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$1.next(ServiceLoader.java:480)
at
org.apache.nifi.nar.ExtensionManager.loadExtensions(ExtensionManager.java:138)
at
org.apache.nifi.nar.ExtensionManager.discoverExtensions(ExtensionManager.java:104)
at org.apache.nifi.web.server.JettyServer.start(JettyServer.java:699)
at org.apache.nifi.NiFi.<init>(NiFi.java:160)
at org.apache.nifi.NiFi.main(NiFi.java:267)
Caused by: java.lang.NoClassDefFoundError:
org/apache/nifi/processor/util/StandardValidators
at
com.jidmu.processors.JSONCondenser.JSONCondenser.<clinit>(JSONCondenser.java:58)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at
java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
... 7 common frames omitted
Caused by: java.lang.ClassNotFoundException:
org.apache.nifi.processor.util.StandardValidators
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 14 common frames omitted
> On 7 Nov 2017, at 4:02 am, Joe Witt <[email protected]> wrote:
>
> Can you share the code by chance for a review? Otherwise, you'll want
> to add a debugger at runtime and examine the context classloader as it
> goes through to see where it goes wonky.
>
> What version are you on?
>
> Thanks
>
> On Mon, Nov 6, 2017 at 11:58 AM, Phil H <[email protected]> wrote:
>> Hi guys,
>>
>> I have just (today) started having issues with a new processor I've written
>> where a seemingly random class (e.g.: StandardValidators) fails to load when
>> NiFi is initializing. I've created this processor like all my others (using
>> the maven archetype) and the VM I'm running it on has not changed versions
>> of any software.
>>
>> I removed any reference to StandardValidators, and the NAR then loaded
>> successfully. As I added some more functionality, I then had the same
>> ClassNotFoundException occur with a different random class.
>>
>> Because I have used the maven archetype, all my other processors obviously
>> use StandardValidators, so it's not like the class itself is somehow
>> corrupted. This feels like either a NiFi or maybe even JVM bug (or other
>> issue that is surfacing as this ClassNotFoundException).
>>
>> Pulling my hair out here - would love some help!
>>
>> Cheers,
>> Phil
