修复损坏的neo4j数据库(2.3.2社区)

Question

我的neo4j-2.3.2社区数据库用完了磁盘空间(80G).我做了一个干净的关闭它,然后添加了更多的磁盘,并试图启动它备份,只是为了得到神秘的错误消息,并让它拒绝启动.

今天早上,当我意识到磁盘已满并且不再接受任何插入时,我把它关闭了.直到今天晚上我都没有回来试图把它带回来.我为停机和重启之间的日志中的明显差距道歉.数据库仍处于原型/概念验证阶段.在过去一周左右的时间里,我一直在运行作业来加载数据.我真的,真的不想重新开始那个数据加载过程.这太慢了.

我希望有人会告诉我有一个"neo4j --force_repair"类型的命令行选项可以解决这个问题.我的数据加载器非常智能,可以在尝试加载新记录之前检查它在数据库中成功插入的最后记录,因此如果我们丢失了一些,那么它应该没问题.

这是我在console.log中看到的内容.

2016-01-31 16:25:56.648+0000 INFO  Successfully shutdown Neo4j Server
2016-01-31 16:25:56.810+0000 INFO  Successfully stopped database
2016-01-31 16:25:56.811+0000 INFO  Successfully shutdown database
2016-02-01 01:16:10.591+0000 INFO  Successfully shutdown Neo4j Server
2016-02-01 01:16:10.593+0000 ERROR Failed to start Neo4j: Starting Neo4j failed: Component 'org.neo4j.server.database.LifecycleManagingDatabase@2d9e9010' was successfully initialized, but failed to start. Please see attached cause exception. Starting Neo4j failed: Component 'org.neo4j.server.database.LifecycleManagingDatabase@2d9e9010' 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@2d9e9010' was successfully initialized, but failed to start. Please see attached cause exception.
    at org.neo4j.server.exception.ServerStartupErrors.translateToServerStartupError(ServerStartupErrors.java:67)
    at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:234)
    at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:97)
    at org.neo4j.server.CommunityBootstrapper.start(CommunityBootstrapper.java:48)
    at org.neo4j.server.CommunityBootstrapper.main(CommunityBootstrapper.java:35)
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.server.database.LifecycleManagingDatabase@2d9e9010' was successfully initialized, but failed to start. Please see attached cause exception.
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:462)
    at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:111)
    at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:194)
    ... 3 more
Caused by: java.lang.RuntimeException: Error starting org.neo4j.kernel.impl.factory.CommunityFacadeFactory, /home/neo4j/neo4j-community-2.3.2/data/graph.db
    at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:143)
    at org.neo4j.kernel.impl.factory.CommunityFacadeFactory.newFacade(CommunityFacadeFactory.java:43)
    at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:108)
    at org.neo4j.server.CommunityNeoServer$1.newGraphDatabase(CommunityNeoServer.java:66)
    at org.neo4j.server.database.LifecycleManagingDatabase.start(LifecycleManagingDatabase.java:95)
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:452)
    ... 5 more
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.recovery.Recovery@4ec23a22' failed to initialize. Please see attached cause exception.
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.init(LifeSupport.java:434)
    at org.neo4j.kernel.lifecycle.LifeSupport.init(LifeSupport.java:66)
    at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:102)
    at org.neo4j.kernel.NeoStoreDataSource.start(NeoStoreDataSource.java:600)
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:452)
    at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:111)
    at org.neo4j.kernel.impl.transaction.state.DataSourceManager.start(DataSourceManager.java:112)
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:452)
    at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:111)
    at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:139)
    ... 10 more
Caused by: java.lang.IllegalArgumentException: Unknown entry type -1 for version -1. At position LogPosition{logVersion=252, byteOffset=100663356} and entry version V2_1
    at org.neo4j.kernel.impl.transaction.log.entry.LogEntryVersion.entryParser(LogEntryVersion.java:207)
    at org.neo4j.kernel.impl.transaction.log.entry.VersionAwareLogEntryReader.readLogEntry(VersionAwareLogEntryReader.java:92)
    at org.neo4j.kernel.impl.transaction.log.LogEntryCursor.next(LogEntryCursor.java:54)
    at org.neo4j.kernel.recovery.LatestCheckPointFinder.find(LatestCheckPointFinder.java:77)
    at org.neo4j.kernel.recovery.PositionToRecoverFrom.apply(PositionToRecoverFrom.java:53)
    at org.neo4j.kernel.recovery.DefaultRecoverySPI.getPositionToRecoverFrom(DefaultRecoverySPI.java:135)
    at org.neo4j.kernel.recovery.Recovery.init(Recovery.java:72)
    at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.init(LifeSupport.java:424)
    ... 19 more

Answer 1

这看起来只是部分写入了事务日志.如果这是真的,数据存储本身不太可能被破坏.

警告:在对data/graph.db文件夹进行任何手动更改之前,请务必准备好备份副本.

在继续之前,请阅读上一段.备份采取？如果是,请尝试删除data/graph.dbby 中的事务日志文件rm neostore.transaction.db.*.尝试启动Neo4j.如果仍然无法启动,请粘贴data/graph.db/messages.log包含最新启动顺序的片段 - 这应该提供更多洞察力.