Hi Mike, No, we are running standard NiFi 1.4.0 and are using the standard NiFi Maven plugin 1.2.0.
We just have implemented a couple of custom processor and service NARs. Thanks Arne > On 2. Mar 2018, at 17:54, Mike Thomsen <mikerthom...@gmail.com> wrote: > > Are you by any chance running a custom build of NiFi? > > On Fri, Mar 2, 2018 at 9:44 AM, Arne Degenring <arne.degenr...@luxonit.com > <mailto:arne.degenr...@luxonit.com>> wrote: > Hi, > > We have seen a strange problem on NiFi 1.4.0 where custom processors could > suddenly not be started, because of incompatibility with custom services: > > 2018-03-02 13:40:35,490 ERROR [main] o.apache.nifi.controller.FlowController > Unable to start …[id=5d57d39a-015c-1000-ffff-ffffd654d90b] due to > java.lang.IllegalStateException: Processor … is not in a valid state due to … > is invalid because … - 1.4-SNAPSHOT from … is not compatible with … - > 1.4-SNAPSHOT …] > > It seems that the root cause was related to: > > 2018-03-02 13:39:55,086 WARN [main] org.apache.nifi.nar.NarClassLoaders While > loading …:…:1.5-SNAPSHOT' unable to locate exact NAR dependency > '…:…:1.4-20180302.111133-16'. Only found one possible match > …:….:1.4-SNAPSHOT'. Continuing... > > It turned out that our various custom NARs were built on different built > agents. > > Maven has the (ugly) behaviour that when a snapshot version is present in the > local repository after local build, the version number will be e.g. > 1.4-SNAPSHOT. However if it is downloaded from a remote repository, the > version number includes a timestamp such as 1.4-20180302.111133-16. > > So the manifest of the depending NARs contained: > > Nar-Dependency-Version: 1.4-20180302.111133-16 > > while the other NAR file declared: > > Nar-Version: 1.4-SNAPSHOT > > Not sure if NiFi 1.5 would behave differently when loading such NAR files, > but I would recommend to anyway fix the NiFi Maven Plugin: > > https://github.com/apache/nifi-maven/blob/master/src/main/java/org/apache/nifi/NarMojo.java > > <https://github.com/apache/nifi-maven/blob/master/src/main/java/org/apache/nifi/NarMojo.java> > > Replace line 705: > narDependency = new NarDependency(artifact.getGroupId(), > artifact.getArtifactId(), artifact.getVersion()); > > with: > narDependency = new NarDependency(artifact.getGroupId(), > artifact.getArtifactId(), artifact.getBaseVersion()); > > Explanation: artifact.getBaseVersion() will always consistenly return > -SNAPSHOT, even in case the artifact was a timestamped snapshot downloaded > from a remote repo. > > Thanks > Arne > > >
