Neo4J 服务器异常 - 无法启动

Question

服务器一直运行良好，但突然停止。尝试重新启动，但没有帮助。日志是这样写的:

2015-02-18 15:07:58.092+0000 INFO  [o.n.k.i.DiagnosticsManager]: --- SHUTDOWN diagnostics END ---
2015-02-18 15:07:58.336+0000 ERROR [o.n.s.CommunityBootstrapper]: Failed to start Neo Server on port [7474]
org.neo4j.server.ServerStartupException: Starting Neo4j Server failed: Error starting org.neo4j.kernel.EmbeddedGraphDatabase, /var/lib/neo4j-community-2.1.4/data/graph.db
        at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:226) ~[neo4j-server-2.1.4.jar:2.1.4]
        at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:108) [neo4j-server-2.1.4.jar:2.1.4]
        at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:62) [neo4j-server-2.1.4.jar:2.1.4]
Caused by: java.lang.RuntimeException: Error starting org.neo4j.kernel.EmbeddedGraphDatabase, /var/lib/neo4j-community-2.1.4/data/graph.db
        at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:366) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:59) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.impl.recovery.StoreRecoverer.recover(StoreRecoverer.java:123) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.server.preflight.PerformRecoveryIfNecessary.run(PerformRecoveryIfNecessary.java:65) ~[neo4j-server-2.1.4.jar:2.1.4]
        at org.neo4j.server.preflight.PreFlightTasks.run(PreFlightTasks.java:71) ~[neo4j-server-2.1.4.jar:2.1.4]
        at org.neo4j.server.AbstractNeoServer.runPreflightTasks(AbstractNeoServer.java:362) ~[neo4j-server-2.1.4.jar:2.1.4]
        at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:159) ~[neo4j-server-2.1.4.jar:2.1.4]
        ... 2 common frames omitted
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.StoreLockerLifecycleAdapter@7bd760a1' was successfully initialized, but failed to start. Please see attached cause exception.
        at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:513) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:343) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        ... 8 common frames omitted
Caused by: org.neo4j.kernel.StoreLockException: Unable to obtain lock on store lock file: /var/lib/neo4j-community-2.1.4/data/graph.db/store_lock. Please ensure no other process is using this database, and that the directory is writable (required even for read-only access)
        at org.neo4j.kernel.StoreLocker.checkLock(StoreLocker.java:82) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.StoreLockerLifecycleAdapter.start(StoreLockerLifecycleAdapter.java:44) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:507) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        ... 10 common frames omitted
Caused by: java.io.IOException: Unable to lock org.neo4j.kernel.impl.nioneo.store.StoreFileChannel@c8925d7
        at org.neo4j.kernel.impl.nioneo.store.FileLock.wrapFileChannelLock(FileLock.java:38) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.impl.nioneo.store.FileLock.getOsSpecificFileLock(FileLock.java:93) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.DefaultFileSystemAbstraction.tryLock(DefaultFileSystemAbstraction.java:93) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        at org.neo4j.kernel.StoreLocker.checkLock(StoreLocker.java:74) ~[neo4j-kernel-2.1.4.jar:2.1.4]
        ... 12 common frames omitted

更新

根据答案中给出的建议采取行动，但不幸的是服务器仍然没有启动。 neo4j start 命令在过去 10 分钟内一直在等待服务器启动:

Using additional JVM arguments: -server -XX:+DisableExplicitGC -Dorg.neo4j.server.properties=conf/neo4j-server.properties -Djava.util.logging.config.file=conf/logging.properties -Dlog4j.configuration=file:conf/log4j.properties -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled Starting Neo4j Server...WARNING: not changing user process [29578]... waiting for server to be ready.........

日志文件说:

2015-02-18 15:50:09.958+0000 INFO  [o.n.k.i.t.x.XaLogicalLog]: [/var/lib/neo4j-community-2.1.4/data/graph.db/nioneo_logical.log.1] entries found=91485 lastEntryPos=5328191
2015-02-18 15:50:09.958+0000 INFO  [o.n.k.i.t.x.XaLogicalLog]: Opened logical log [/var/lib/neo4j-community-2.1.4/data/graph.db/nioneo_logical.log.1] version=8, lastTxId=513504 (recovered)
2015-02-18 15:50:09.959+0000 INFO  [o.n.k.i.t.x.XaLogicalLog]: XaResourceManager[nioneo_logical.log] sorting 0 xids
2015-02-18 15:50:09.997+0000 INFO  [o.n.k.i.t.x.XaLogicalLog]: XaResourceManager[nioneo_logical.log] checkRecoveryComplete 0 xids
2015-02-18 15:50:10.407+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.relationshiptypestore.db.names rebuild id generator, highId=35 defragged count=0
2015-02-18 15:50:10.490+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.labeltokenstore.db.names rebuild id generator, highId=17 defragged count=0
2015-02-18 15:50:10.571+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.labeltokenstore.db rebuild id generator, highId=16 defragged count=0
2015-02-18 15:50:10.653+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.propertystore.db.index.keys rebuild id generator, highId=49 defragged count=0
2015-02-18 15:50:10.776+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.propertystore.db.index rebuild id generator, highId=44 defragged count=0
2015-02-18 15:50:10.819+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.propertystore.db.strings rebuild id generator, highId=41 defragged count=0
2015-02-18 15:50:11.101+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.propertystore.db.arrays rebuild id generator, highId=7954 defragged count=0
2015-02-18 15:50:15.753+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.propertystore.db rebuild id generator, highId=212690 defragged count=0
2015-02-18 15:50:19.113+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.relationshipstore.db rebuild id generator, highId=234591 defragged count=0
2015-02-18 15:50:19.155+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.nodestore.db.labels rebuild id generator, highId=1 defragged count=0
2015-02-18 15:50:20.131+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.nodestore.db rebuild id generator, highId=46820 defragged count=0
2015-02-18 15:50:20.194+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.schemastore.db rebuild id generator, highId=5 defragged count=0
2015-02-18 15:50:20.300+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore.relationshipgroupstore.db rebuild id generator, highId=14508 defragged count=0
2015-02-18 15:50:20.423+0000 INFO  [o.n.k.i.n.s.StoreFactory]: /var/lib/neo4j-community-2.1.4/data/graph.db/neostore rebuild id generator, highId=9 defragged count=0
2015-02-18 15:50:20.424+0000 INFO  [o.n.k.i.t.x.XaLogicalLog]: XaResourceManager[nioneo_logical.log] recovery completed.
2015-02-18 15:50:20.424+0000 INFO  [o.n.k.i.t.x.XaLogicalLog]: Recovery on log [/var/lib/neo4j-community-2.1.4/data/graph.db/nioneo_logical.log.1] completed.
2015-02-18 15:50:20.628+0000 INFO  [o.n.k.i.t.TxManager]: TM opening log: /var/lib/neo4j-community-2.1.4/data/graph.db/tm_tx_log.2
2015-02-18 15:50:20.992+0000 INFO  [o.n.k.i.t.x.XaLogicalLog]: Non clean shutdown detected on log [/var/lib/neo4j-community-2.1.4/data/graph.db/index/lucene.log.1]. Recovery started ...
2015-02-18 15:50:20.992+0000 INFO  [o.n.k.i.t.x.XaLogicalLog]: [/var/lib/neo4j-community-2.1.4/data/graph.db/index/lucene.log.1] logVersion=2 with committed tx=199234

我的服务器之前有大约 50K 节点和 300K 关系。服务器是否试图恢复数据，从而导致启动延迟？

Answer 1

错误信息

 org.neo4j.kernel.StoreLockException: Unable to obtain lock on store lock file: /var/lib/neo4j-community-2.1.4/data/graph.db/store_lock. Please ensure no other process is using this database, and that the directory is writable (required even for read-only access)

几乎是自言自语。您要么没有文件系统权限来访问您的 graph.db 文件夹，要么(我认为更有可能)在同一个 graph.db 上还有另一个 Neo4j 进程运行 目录。您可以使用 jps 或 ps aux | 等常见的可疑对象检查正在运行的进程。 grep java.