从Linux连接到Neo4j的问题 [英] Issues in connecting to Neo4j from linux

问题描述

尝试从Java连接到Neo4j时出现以下错误:

Trying to connect to Neo4j from java I get the following error:

线程主"中的异常java.lang.RuntimeException:启动错误 org.neo4j.kernel.EmbeddedGraphDatabase，/data/graph.db 在org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:323) 在org.neo4j.kernel.EmbeddedGraphDatabase.(EmbeddedGraphDatabase.java:100) 在org.neo4j.graphdb.factory.GraphDatabaseFactory $ 1.newDatabase(GraphDatabaseFactory.java:92) 在org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:197) 在org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:69) 在.....

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 .....

由以下原因引起:org.neo4j.kernel.lifecycle.LifecycleException: 成分 "org.neo4j.kernel.impl.transaction.XaDataSourceManager@4514ba77"为 成功初始化，但无法启动.请参照附件 导致异常. 在org.neo4j.kernel.lifecycle.LifeSupport $ LifecycleInstance.start(LifeSupport.java:504) 在org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115) 在org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:300)

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'是 成功初始化，但无法启动.请参照附件 导致异常. 在org.neo4j.kernel.lifecycle.LifeSupport $ LifecycleInstance.start(LifeSupport.java:504) 在org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115) 在org.neo4j.kernel.impl.transaction.XaDataSourceManager.start(XaDataSourceManager.java:165) 在org.neo4j.kernel.lifecycle.LifeSupport $ LifecycleInstance.start(LifeSupport.java:498)

'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

找到了.可在类路径上使用内核扩展:

found. Kernel extensions available on classpath:

类路径条目:/...../java/....xyz.jar 在org.neo4j.kernel.api.index.SchemaIndexProvider $ 2.select(SchemaIndexProvider.java:136) 在org.neo4j.kernel.api.index.SchemaIndexProvider $ 2.select(SchemaIndexProvider.java:128) 在org.neo4j.kernel.extension.KernelExtensions.resolveDependency(KernelExtensions.java:207) 在org.neo4j.kernel.InternalAbstractGraphDatabase $ DependencyResolverImpl.resolveDependency(InternalAbstractGraphDatabase.java:1403) 在org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.start(NeoStoreXaDataSource.java:311) 在org.neo4j.kernel.lifecycle.LifeSupport $ LifecycleInstance.start(LifeSupport.java:498) ...另外12个

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

我正在使用Ne04j-2.0.0-M05版本，​​在Linux机器上的Java 7下运行Java代码.尽管在Windows计算机中，相同的jar文件和Java代码也可以很好地工作. Web管理界面运行良好(因此，到db的路径可能不是问题，因为我在org.neo4j.server.database.location和org.neo4j.server.webadmin.data.uri中指定了相同的路径)，

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),

我以前用来连接的Java代码是:

The java code I used to connect is :

String dbpath = "/NEO4J_HOME/data/graph.db/";
graphdb = new GraphDatabaseFactory().newEmbeddedDatabase(dbpath);

您能否确定可能导致 java.lang.IllegalArgumentException的原因:未找到架构索引提供者org.neo4j.kernel.api.index.SchemaIndexProvider

推荐答案

将与Neo4j相关的jar分开保存，即不要将它们捆绑在您创建的jar中.相反，只需使用类路径选项在运行时指向Neo4j库即可.

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.

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