I did one of mine recently, it was pretty painless. See:

https://github.com/maxdemarzi/graph_processing/commit/0f8c632a13d106d562ebfd9c7b7ce2051012c46c

Are you trying to go from Extension to Procedure or keeping it an 
extension? Got code up anywhere we can take a look?

On Tuesday, August 23, 2016 at 11:16:11 AM UTC-5, Sotiris Beis wrote:
>
> Any update on this issue? I have the exact same problem.
>
> Cheers,
> Sotiris
>
> On Wednesday, 27 April 2016 17:59:57 UTC+1, Artur W wrote:
>>
>> Hi,
>>
>> I try to migrate my unmaneged extention from  Neo4j 2.3.2 (Comunity 
>> Edition)  to Neo4J 3.0 (CE) . So I updated the Neo4j version in my pom.xml 
>> file and rebuild the plugin.
>> After that I copied it into the plugin directory and edited the 
>> neo4j.conf as following:
>>
>> dbms.unmanaged_extension_classes=package.path.to.my.resource=/graph/
>>
>> When I try to start neo4j I get the following stacktracke:
>>
>> 2016-04-26 12:52:54.297+0000 INFO  Starting...
>> 2016-04-26 12:52:54.784+0000 INFO  Bolt enabled on localhost:7687.
>> 2016-04-26 12:52:56.589+0000 ERROR Failed to start Neo4j: Starting Neo4j 
>> failed: Component 
>> 'org.neo4j.server.database.LifecycleManagingDatabase@5384a166' was 
>> successfully initialized, but failed to start. Please see attached cause 
>> exception. Starting Neo4j failed: Component 
>> 'org.neo4j.server.database.LifecycleManagingDatabase@5384a166' was 
>> successfully initialized, but failed to start. Please see attached cause 
>> exception.
>> org.neo4j.server.ServerStartupException: Starting Neo4j failed: Component 
>> 'org.neo4j.server.database.LifecycleManagingDatabase@5384a166' was 
>> successfully initialized, but failed to start. Please see attached cause 
>> exception.
>> at 
>> org.neo4j.server.exception.ServerStartupErrors.translateToServerStartupError(ServerStartupErrors.java:68)
>> at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:217)
>> at org.neo4j.server.ServerBootstrapper.start(ServerBootstrapper.java:81)
>> at org.neo4j.server.ServerBootstrapper.start(ServerBootstrapper.java:60)
>> at org.neo4j.server.CommunityEntryPoint.main(CommunityEntryPoint.java:28)
>> Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 
>> 'org.neo4j.server.database.LifecycleManagingDatabase@5384a166' was 
>> successfully initialized, but failed to start. Please see attached cause 
>> exception.
>> at 
>> org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:444)
>> at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
>> at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:189)
>> ... 3 more
>> Caused by: java.lang.RuntimeException: Error starting 
>> org.neo4j.kernel.impl.factory.CommunityFacadeFactory, 
>> /home/artur/apps/neo4j-community-3.0.0/data/databases/graph.db
>> at 
>> org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:144)
>> at 
>> org.neo4j.kernel.impl.factory.CommunityFacadeFactory.newFacade(CommunityFacadeFactory.java:40)
>> at 
>> org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:108)
>> at 
>> org.neo4j.server.CommunityNeoServer.lambda$static$32(CommunityNeoServer.java:55)
>> at 
>> org.neo4j.server.CommunityNeoServer$$Lambda$43/1393931310.newGraphDatabase(Unknown
>>  
>> Source)
>> at 
>> org.neo4j.server.database.LifecycleManagingDatabase.start(LifecycleManagingDatabase.java:89)
>> at 
>> org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:434)
>> ... 5 more
>> Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 
>> 'org.neo4j.kernel.impl.proc.Procedures@4e6bcab1' was successfully 
>> initialized, but failed to start. Please see attached cause exception.
>> at 
>> org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:444)
>> at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
>> at 
>> org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:140)
>> ... 11 more
>> Caused by: org.neo4j.kernel.api.exceptions.ProcedureException: Procedures 
>> must return a Stream of records, where a record is a concrete class
>> that you define and not a Stream<?>.
>> at org.neo4j.kernel.impl.proc.OutputMappers.mapper(OutputMappers.java:162)
>> at 
>> org.neo4j.kernel.impl.proc.ReflectiveProcedureCompiler.compileProcedure(ReflectiveProcedureCompiler.java:106)
>> at 
>> org.neo4j.kernel.impl.proc.ReflectiveProcedureCompiler.compile(ReflectiveProcedureCompiler.java:84)
>> at 
>> org.neo4j.kernel.impl.proc.ProcedureJarLoader.loadProcedures(ProcedureJarLoader.java:88)
>> at 
>> org.neo4j.kernel.impl.proc.ProcedureJarLoader.loadProceduresFromDir(ProcedureJarLoader.java:77)
>> at org.neo4j.kernel.impl.proc.Procedures.start(Procedures.java:125)
>> at 
>> org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:434)
>> ... 13 more
>>
>>
>> Using the same in 2.3.2 via 
>> org.neo4j.server.thirdparty_jaxrs_classes=package.path.to.my.resources=/graph
>>  
>> in neo4j-server.properties works fine.
>>
>> Thanks.
>>
>> Regards Artur.
>>
>>
>>
>>
>>

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