今天我已经将我的Neo4j服务器（在Ubuntu上运行）从3.1.0更新到3.1.3！到目前为止，一切都运作良好 重新启动服务器后，它立即崩溃。每次启动/重启服务器时都会发生这种情况......
这是错误日志neo4.log
中的部分2017-05-01 15:18:30.896+0000 INFO Starting...
2017-05-01 15:18:31.950+0000 INFO Bolt enabled on localhost:7687.
2017-05-01 15:18:35.181+0000 ERROR Failed to start Neo4j: Starting Neo4j failed: Component 'org.neo4j.server.database.LifecycleManagingDatabase@486c3088' was successfully initialized, but failed to start. Please see attached cause exception. Starting Neo4j failed: Component 'org.neo4j.server.database.LifecycleManagingDatabase@486c3088' 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@486c3088' 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:227)
at org.neo4j.server.ServerBootstrapper.start(ServerBootstrapper.java:91)
at org.neo4j.server.ServerBootstrapper.start(ServerBootstrapper.java:68)
at org.neo4j.server.CommunityEntryPoint.main(CommunityEntryPoint.java:28)
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.server.database.LifecycleManagingDatabase@486c3088' was successfully initialized, but failed to start. Please see attached cause exception.
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:443)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:199)
... 3 more
Caused by: java.lang.RuntimeException: Error starting org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory, /var/lib/neo4j/data/databases/graph.db
at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:193)
at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:124)
at org.neo4j.server.CommunityNeoServer.lambda$static$0(CommunityNeoServer.java:57)
at org.neo4j.server.database.LifecycleManagingDatabase.start(LifecycleManagingDatabase.java:89)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:433)
... 5 more
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.impl.proc.Procedures@78b283fb' was successfully initialized, but failed to start. Please see attached cause exception.
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:443)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:189)
... 9 more
Caused by: org.neo4j.kernel.api.exceptions.ProcedureException: Unable to register procedure, because the name `apoc.algo.betweenness` is already in use.
at org.neo4j.kernel.impl.proc.ProcedureRegistry.register(ProcedureRegistry.java:81)
at org.neo4j.kernel.impl.proc.Procedures.register(Procedures.java:103)
at org.neo4j.kernel.impl.proc.Procedures.register(Procedures.java:76)
at org.neo4j.kernel.impl.proc.Procedures.start(Procedures.java:209)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:433)
... 11 more
nohup: ignoring input
2017-05-01 15:19:58.689+0000 INFO Starting...
2017-05-01 15:19:59.725+0000 INFO Bolt enabled on localhost:7687.
2017-05-01 15:20:01.504+0000 ERROR Cannot register procedure AssertSchemaProcedure org.neo4j.kernel.api.proc.ProcedureSignature$Builder.mode(Lorg/neo4j/procedure/Mode;)Lorg/neo4j/kernel/api/proc/ProcedureSignature$Builder;
java.lang.NoSuchMethodError: org.neo4j.kernel.api.proc.ProcedureSignature$Builder.mode(Lorg/neo4j/procedure/Mode;)Lorg/neo4j/kernel/api/proc/ProcedureSignature$Builder;
at apoc.schema.AssertSchemaProcedure.signature(AssertSchemaProcedure.java:154)
at org.neo4j.kernel.impl.proc.ProcedureRegistry.register(ProcedureRegistry.java:53)
at org.neo4j.kernel.impl.proc.Procedures.register(Procedures.java:103)
at org.neo4j.kernel.impl.proc.Procedures.register(Procedures.java:76)
at apoc.ApocKernelExtensionFactory$ApocLifecycle.registerCustomProcedures(ApocKernelExtensionFactory.java:79)
at apoc.ApocKernelExtensionFactory$ApocLifecycle.start(ApocKernelExtensionFactory.java:67)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:433)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
at org.neo4j.kernel.extension.KernelExtensions.start(KernelExtensions.java:86)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:433)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.initFacade(GraphDatabaseFacadeFactory.java:189)
at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:124)
at org.neo4j.server.CommunityNeoServer.lambda$static$0(CommunityNeoServer.java:57)
at org.neo4j.server.database.LifecycleManagingDatabase.start(LifecycleManagingDatabase.java:89)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:433)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:199)
更新Neo4j后是否有人遇到此问题或者可以帮助我“理解”错误日志？
提前致谢;）
更新
当我启动Neo4j时，我会收到此消息：
启动Neo4j。 开始neo4j（pid 28724）。默认情况下，它位于http://localhost:7474/ / usr / share / neo4j / bin / neo4j：第176行：/ usr / share / neo4j / logs /var/log/neo4j/neo4j.log：没有这样的文件或目录 在服务器准备好之前可能会有短暂的延迟。 有关当前状态，请参阅/ usr / share / neo4j / logs /var/log/neo4j/neo4j.log。
我突出了“嫌疑人”部分，在更新之前没有出现......
答案 0 :(得分：1)
这是你的调用堆栈的最终原因：
Caused by: org.neo4j.kernel.api.exceptions.ProcedureException: Unable to register procedure, because the name `apoc.algo.betweenness` is already in use.
当您安装新的APOC插件.jar而不删除现有的APOC .jar时，可以看到此类异常，其中APOC过程名称已在使用中。
如果这适用于您，请删除旧的APOC .jar并尝试再次启动neo4j。