Issues in connecting to Neo4j from linux - neo4j

Question

Trying to connect to Neo4j from java I get the following error:
Exception in thread "main" java.lang.RuntimeException: Error starting
org.neo4j.kernel.EmbeddedGraphDatabase, /data/graph.db
at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:323)
at org.neo4j.kernel.EmbeddedGraphDatabase.(EmbeddedGraphDatabase.java:100)
at org.neo4j.graphdb.factory.GraphDatabaseFactory$1.newDatabase(GraphDatabaseFactory.java:92)
at org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:197)
at org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:69)
at .....
Caused by: org.neo4j.kernel.lifecycle.LifecycleException:
Component
'org.neo4j.kernel.impl.transaction.XaDataSourceManager#4514ba77' was
successfully initialized, but failed to start. Please see attached
cause exception.
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:504)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115)
at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:300)
... 7 more Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component
'org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource#2c86c977' was
successfully initialized, but failed to start. Please see attached
cause exception.
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:504)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115)
at org.neo4j.kernel.impl.transaction.XaDataSourceManager.start(XaDataSourceManager.java:165)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:498)
... 9 more Caused by: java.lang.IllegalArgumentException: No schema index provider org.neo4j.kernel.api.index.SchemaIndexProvider
found. Kernel extensions available on classpath:
Class path entries: /...../java/....xyz.jar
at org.neo4j.kernel.api.index.SchemaIndexProvider$2.select(SchemaIndexProvider.java:136)
at org.neo4j.kernel.api.index.SchemaIndexProvider$2.select(SchemaIndexProvider.java:128)
at org.neo4j.kernel.extension.KernelExtensions.resolveDependency(KernelExtensions.java:207)
at org.neo4j.kernel.InternalAbstractGraphDatabase$DependencyResolverImpl.resolveDependency(InternalAbstractGraphDatabase.java:1403)
at org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.start(NeoStoreXaDataSource.java:311)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:498)
... 12 more
I am using Ne04j-2.0.0-M05 version, running the java code under Java 7 in a linux machine. The same jar files and java code works good though in a windows machine. The web admin interface works well (hence path to db may not be a issue since I ve given the same path in org.neo4j.server.database.location and org.neo4j.server.webadmin.data.uri),
The java code I used to connect is :
String dbpath = "/NEO4J_HOME/data/graph.db/";
graphdb = new GraphDatabaseFactory().newEmbeddedDatabase(dbpath);
Can you tell what might cause the java.lang.IllegalArgumentException: No schema index provider org.neo4j.kernel.api.index.SchemaIndexProvider found

Answer 1

Looks like you're lacking neo4j-lucene-index on your classpath. If that hint does not help provide a list of jars being on the classpath.

Answer 2

Keep Neo4j related jars seperate, i.e do not bundle them inside the jar you create. Instead just make use of class path option to point Neo4j libraries in run time.

Answer 3

I got the same error, and finally fount it's the different version of neo4j and neo4j-lucene-index which caused the error. They need to keep in the same version. Still not sure which version of lucene it depends on, but 3.6.2 can survive the compile. Thanks Stefan. It's hard to find the latest version of everything neo4j depends on.
compile "org.neo4j:neo4j-kernel:2.0.0-RC1"
compile "org.apache.lucene:lucene-core:3.6.2"
compile "org.neo4j:neo4j-lucene-index:2.0.0-RC1"
This fixed my error.