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在过去一个月左右的时间里，我一直在使用 neo4j 2.0.0 M3 版本来开发一个简单的 Web 应用程序。直到今天我去启动数据库时，我的版本完全没有问题。

我有点新手，很难确定问题的确切原因是什么以及如何解决它。错误日志如下，我希望在解释输出时获得一些帮助。谢谢！

  Jul 23, 2013 11:10:16 AM org.neo4j.server.logging.Logger log
SEVERE: 
java.lang.RuntimeException: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.impl.transaction.XaDataSourceManager@b05236' was successfully initialized, but failed to start. Please see attached cause exception.
    at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:319)
    at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:100)
    at org.neo4j.graphdb.factory.GraphDatabaseFactory$1.newDatabase(GraphDatabaseFactory.java:92)
    at org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:197)
    at org.neo4j.kernel.impl.recovery.StoreRecoverer.recover(StoreRecoverer.java:115)
    at org.neo4j.server.preflight.PerformRecoveryIfNecessary.run(PerformRecoveryIfNecessary.java:59)
    at org.neo4j.server.preflight.PreFlightTasks.run(PreFlightTasks.java:70)
    at org.neo4j.server.AbstractNeoServer.runPreflightTasks(AbstractNeoServer.java:299)
    at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:132)
    at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:86)
    at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:49)
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.impl.transaction.XaDataSourceManager@b05236' was successfully initialized, but failed to start. Please see attached cause exception.
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:504)
    at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115)
    at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:296)
    ... 10 more
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource@6760bf50' was successfully initialized, but failed to start. Please see attached cause exception.
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:504)
    at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115)
    at org.neo4j.kernel.impl.transaction.XaDataSourceManager.start(XaDataSourceManager.java:126)
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:498)
    ... 12 more
Caused by: java.lang.NoClassDefFoundError: java/nio/channels/SeekableByteChannel
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.doInternalRecovery(XaLogicalLog.java:765)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.open(XaLogicalLog.java:205)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.open(XaLogicalLog.java:160)
    at org.neo4j.kernel.impl.transaction.xaframework.XaContainer.openLogicalLog(XaContainer.java:64)
    at org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.start(NeoStoreXaDataSource.java:304)
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:498)
    ... 15 more
Caused by: java.lang.ClassNotFoundException: java.nio.channels.SeekableByteChannel
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 21 more
Jul 23, 2013 11:10:16 AM org.neo4j.server.logging.Logger log
SEVERE: Failed to start Neo Server on port [7474]
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1 回答 1

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这可能是因为 Neo4J 的系统要求。它说你需要 Java 7。

看起来您正在使用java.lang.ClassNotFoundException: java.nio.channels.SeekableByteChannel抛出的 Java 6。使用 Java 7 应该可以解决这个问题。

于 2013-07-23T18:40:12.303 回答