Re: custom processor development : problems with scops in parent POM

[N H <nh...@yahoo.com>]

Hi Aldrin Piri
thank you. I missed the point. Adding this dependency solved the problem :
        <dependency>
            <groupId>org.apache.nifi</groupId>
            <artifactId>nifi-standard-services-api-nar</artifactId>
            <type>nar</type>
        </dependency>         


 

    On Wednesday, April 6, 2016 11:43 PM, Aldrin Piri <al...@gmail.com> wrote:
 

 Hello!
Are you trying to incorporate this into the repository check out or a standalone bundle?
In the case of the latter, could you confirm you have established a project dependency structure such as that outlined in the Wiki [1]?
Not only is a provided scope needed to be able to build/compile, but there must also be a dependency on the associated NAR.
Please let us know if you are still experiencing issues.
[1]  https://cwiki.apache.org/confluence/display/NIFI/Maven+Projects+for+Extensions#MavenProjectsforExtensions-LinkingProcessorsandControllerServices
On Fri, Mar 25, 2016 at 5:01 PM, N H <nh...@yahoo.com> wrote:

Hi, 
1. using  org.apache.nifi.distributed.cache.client.Deserializer interface in a custom processor.2. this dependency in pom is needed : nifi-distributed-cache-client-service-api (its scopy is "provided" in parent pom)
3. after deploying processor, this exception is thrown : 

2016-03-26 01:11:02,776 ERROR [main] org.apache.nifi.NiFi Failure to launch NiFi due to java.util.ServiceConfigurationError: org.apache.nifi.processor.Processor: Provider my.nifi.processor.MyProcessor could not be instantiated
java.util.ServiceConfigurationError: org.apache.nifi.processor.Processor: Provider my.nifi.processor.MyProcessor could not be instantiated
    at java.util.ServiceLoader.fail(ServiceLoader.java:224) ~[na:1.7.0_67]
    at java.util.ServiceLoader.access$100(ServiceLoader.java:181) ~[na:1.7.0_67]
    at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:377) ~[na:1.7.0_67]
    at java.util.ServiceLoader$1.next(ServiceLoader.java:445) ~[na:1.7.0_67]
    at org.apache.nifi.nar.ExtensionManager.loadExtensions(ExtensionManager.java:107) ~[nifi-nar-utils-0.5.1.jar:0.5.1]
    at org.apache.nifi.nar.ExtensionManager.discoverExtensions(ExtensionManager.java:88) ~[nifi-nar-utils-0.5.1.jar:0.5.1]
    at org.apache.nifi.NiFi.<init>(NiFi.java:120) ~[nifi-runtime-0.5.1.jar:0.5.1]
    at org.apache.nifi.NiFi.main(NiFi.java:227) ~[nifi-runtime-0.5.1.jar:0.5.1]
Caused by: java.lang.NoClassDefFoundError: org/apache/nifi/distributed/cache/client/Deserializer
    at java.lang.Class.getDeclaredConstructors0(Native Method) ~[na:1.7.0_67]
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2532) ~[na:1.7.0_67]
    at java.lang.Class.getConstructor0(Class.java:2842) ~[na:1.7.0_67]
    at java.lang.Class.newInstance(Class.java:345) ~[na:1.7.0_67]
    at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:373) ~[na:1.7.0_67]
    ... 5 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.nifi.distributed.cache.client.Deserializer
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366) ~[na:1.7.0_67]
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[na:1.7.0_67]
    at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_67]
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[na:1.7.0_67]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[na:1.7.0_67]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[na:1.7.0_67]
    ... 10 common frames omitted
simply because nifi-distributed-cache-client-service-api-0.5.1.jar is not packaged in nar (due to scope of dependency in parent pom).