LifecycleException with GraphDatabaseFactory.newEmbeddedDatabase in OSGI

Neo4j Graph Platform Installation
1

Hello,
I am new to neo4j and I want to embedd neo4j in an OSGI server.

I have created a neo4j-api bundle which embedd all neo4j related libraries and have created a neo4j-store which use the neo4j-api bundle and create an embedded graph database.

I have this exception at start-up :

 java.lang.RuntimeException: Error starting org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory, /storage/cydu/SSIM/Biotech/dev/rdf-server/rdf-server-distribution/target/rdf-server-distribution-1.0.0-bin/rdf-server-distribution-1.0.0/db/data
        at org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:232)
        at org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:148)
        at org.neo4j.graphdb.factory.GraphDatabaseFactory.newDatabase(GraphDatabaseFactory.java:133)
        at org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:122)
        at org.neo4j.graphdb.factory.GraphDatabaseFactory$EmbeddedDatabaseCreator.newDatabase(GraphDatabaseFactory.java:178)
        at org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:210)
        at org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:79)
        at org.hug.simed.rdf.store.neo4j.MyStore.start(MyStore.java:61)
        at org.hug.simed.rdf.store.neo4j.impl.Activator.try_register(Activator.java:47)
        at org.hug.simed.rdf.store.neo4j.impl.Activator.start(Activator.java:71)
        at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:698)
        at org.apache.felix.framework.Felix.activateBundle(Felix.java:2402)
        at org.apache.felix.framework.Felix.startBundle(Felix.java:2308)
        at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1539)
        at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:308)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.NeoStoreDataSource@7a8d46db' was successfully initialized, but failed to start. Please see the attached cause exception "Unknown setting: dbms.tx_log.rotation.size".
        at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:473)
        at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:111)
        at org.neo4j.kernel.impl.transaction.state.DataSourceManager.start(DataSourceManager.java:116)
        at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:452)
        at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:111)
        at org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:227)
        ... 15 more
Caused by: java.lang.IllegalArgumentException: Unknown setting: dbms.tx_log.rotation.size
        at org.neo4j.kernel.configuration.Config.verifyValidDynamicSetting(Config.java:668)
        at org.neo4j.kernel.configuration.Config.registerDynamicUpdateListener(Config.java:711)
        at org.neo4j.kernel.impl.transaction.log.files.LogFilesBuilder.getRotationThresholdAndRegisterForUpdates(LogFilesBuilder.java:260)
        at org.neo4j.kernel.impl.transaction.log.files.LogFilesBuilder.buildContext(LogFilesBuilder.java:239)
        at org.neo4j.kernel.impl.transaction.log.files.LogFilesBuilder.build(LogFilesBuilder.java:182)
        at org.neo4j.kernel.NeoStoreDataSource.start(NeoStoreDataSource.java:331)
        at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:452)
        ... 20 more

Any suggestion how to configure the config file ?

thanks
Cyrille

2

Neo4j uses JVM's ServiceLoader to register available config options. See neo4j/org.neo4j.configuration.LoadableConfig at 3.5 · neo4j/neo4j · GitHub which refers to org.neo4j.graphdb.factory.GraphDatabaseSettings which contains the setting mentioned in the stacktrace.

My suspicion is that repackaging for OSGI does not aggreate the service loader file. Double check your META-INF/services/org.neo4j.configuration.LoadableConfig file.`

3

I have packed my bundle with keeping META-INF/services files and used the service loader mediator (cf. OSGi Blog: java.util.ServiceLoader in OSGi).

I check that the spi services are indeed availables as osgi services

g! inspect capability service 20
org.hug.simed.rdf.neo4j-api [20] provides:

..
service; org.neo4j.configuration.LoadableConfig with properties:
.org.apache.aries.spifly.provider.implclass = org.neo4j.graphdb.factory.GraphDatabaseSettings
service.bundleid = 20
service.id = 59
service.scope = bundle
serviceloader.mediator = 4
service; org.neo4j.configuration.LoadableConfig with properties:
.org.apache.aries.spifly.provider.implclass = org.neo4j.kernel.configuration.ssl.LegacySslPolicyConfig
service.bundleid = 20
service.id = 60
service.scope = bundle
serviceloader.mediator = 4
service; org.neo4j.configuration.LoadableConfig with properties:
.org.apache.aries.spifly.provider.implclass = org.neo4j.kernel.configuration.ssl.SslPolicyConfig
service.bundleid = 20
service.id = 61
service.scope = bundle
serviceloader.mediator = 4
service; org.neo4j.configuration.LoadableConfig with properties:
.org.apache.aries.spifly.provider.implclass = org.neo4j.kernel.impl.index.schema.config.SpatialIndexSettings
service.bundleid = 20
service.id = 62
service.scope = bundle
serviceloader.mediator = 4
service; org.neo4j.configuration.LoadableConfig with properties:
.org.apache.aries.spifly.provider.implclass = org.neo4j.kernel.configuration.ssl.SslSystemSettings
service.bundleid = 20
service.id = 63
service.scope = bundle
serviceloader.mediator = 4

Here is in my client bundle activator test code :

System.out.println("starting neo4j bundle..");

 ServiceLoader<LoadableConfig> serviceLoader = ServiceLoader.load(LoadableConfig.class);
Iterator<LoadableConfig> it = serviceLoader.iterator();

while( it.hasNext() ) {
  final LoadableConfig config = it.next();
  System.out.println("-> "+config);
}

final File databaseDirectory = new File("./db/data/neo-db");

db = new GraphDatabaseFactory()
  .newEmbeddedDatabaseBuilder( databaseDirectory )
  .newGraphDatabase();

And the output :

starting neo4j bundle..
-> org.neo4j.graphdb.factory.GraphDatabaseSettings@24b173a5
-> org.neo4j.kernel.configuration.ssl.LegacySslPolicyConfig@40023c2f
-> org.neo4j.kernel.configuration.ssl.SslPolicyConfig@5aa16064
-> org.neo4j.kernel.impl.index.schema.config.SpatialIndexSettings@32604d
-> org.neo4j.kernel.configuration.ssl.SslSystemSettings@34d38e70
ERROR: Bundle test.neo4j [26] Error starting file:/storage/cydu/SSIM/Biotech/dev/rdf-server/rdf-server-distribution/target/rdf-server-distribution-1.0.0-bin/rdf-server-distribution-1.0.0/bundle/test-neo4j.jar (org.osgi.framework.BundleException: Activator start error in bundle test.neo4j [26].)
java.lang.RuntimeException: Error starting org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory, /storage/cydu/SSIM/Biotech/dev/rdf-server/rdf-server-distribution/target/rdf-server-distribution-1.0.0-bin/rdf-server-distribution-1.0.0/db/data
at org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:232)
at org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:148)
at org.neo4j.graphdb.factory.GraphDatabaseFactory.newDatabase(GraphDatabaseFactory.java:133)
at org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:122)
at org.neo4j.graphdb.factory.GraphDatabaseFactory$EmbeddedDatabaseCreator.newDatabase(GraphDatabaseFactory.java:178)
at org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:210)
at org.hug.simed.rdf.test.impl.Activator.start(Activator.java:67)
at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:698)
at org.apache.felix.framework.Felix.activateBundle(Felix.java:2402)
at org.apache.felix.framework.Felix.startBundle(Felix.java:2308)
at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1539)
at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:308)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.NeoStoreDataSource@678fef7e' was successfully initialized, but failed to start. Please see the attached cause exception "Unknown setting: dbms.tx_log.rotation.size".
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:473)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:111)
at org.neo4j.kernel.impl.transaction.state.DataSourceManager.start(DataSourceManager.java:116)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:452)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:111)
at org.neo4j.graphdb.facade.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:227)
... 12 more
Caused by: java.lang.IllegalArgumentException: Unknown setting: dbms.tx_log.rotation.size
at org.neo4j.kernel.configuration.Config.verifyValidDynamicSetting(Config.java:668)
at org.neo4j.kernel.configuration.Config.registerDynamicUpdateListener(Config.java:711)
at org.neo4j.kernel.impl.transaction.log.files.LogFilesBuilder.getRotationThresholdAndRegisterForUpdates(LogFilesBuilder.java:260)
at org.neo4j.kernel.impl.transaction.log.files.LogFilesBuilder.buildContext(LogFilesBuilder.java:239)
at org.neo4j.kernel.impl.transaction.log.files.LogFilesBuilder.build(LogFilesBuilder.java:182)
at org.neo4j.kernel.NeoStoreDataSource.start(NeoStoreDataSource.java:331)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:452)
... 17 more

:sweat:

4

I'd probably continue with a step debugger to drill down.

5

It seems that my neo4j-api bundle which contains neo4j artifacts need also to "see" SPI services providers.

I have added : <SPI-Consumer>*</SPI-Consumer> and it works ok.

I still need to figure out why I need to add this thing. I was convinced that this should work in the first place

;-)