Question

尝试启动neo4j服务并收到类似

的消息

警告：检测到最大打开文件的限制为1024，而a 建议最小值为40000。警告：问题可能发生服务器的操作。请参阅Neo4j手册关于解除这个限制。启动Neo4j服务器...... 警告：不改变用户进程[17348] ...等待服务器准备好......不好意思Neo4j服务器可能无法启动，请检查日志。

日志说：

Opened [/home/ub/graph_db/neo4j-community-1.7.M01/data/graph.db/nioneo_logical.log.1] clean empty log, version=224, lastTxId=654769
2013-03-14 11:26:28.111+0000: TM opening log: /home/ub/graph_db/neo4j-community-1.7.M01/data/graph.db/tm_tx_log.1
2013-03-14 11:26:28.159+0000: Failed to load index provider lucene Target file[lucene.log.v318] already exists
org.neo4j.graphdb.NotFoundException: Target file[lucene.log.v318] already exists
    at org.neo4j.kernel.impl.util.FileUtils.renameFile(FileUtils.java:165)
    at org.neo4j.kernel.DefaultFileSystemAbstraction.renameFile(DefaultFileSystemAbstraction.java:78)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.renameLogFileToRightVersion(XaLogicalLog.java:700)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.renameIfExists(XaLogicalLog.java:219)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.open(XaLogicalLog.java:171)
    at org.neo4j.kernel.impl.transaction.xaframework.XaContainer.openLogicalLog(XaContainer.java:64)
    at org.neo4j.index.impl.lucene.LuceneDataSource.<init>(LuceneDataSource.java:229)
    at org.neo4j.index.lucene.LuceneIndexProvider.load(LuceneIndexProvider.java:71)
    at org.neo4j.kernel.AbstractGraphDatabase$DefaultKernelExtensionLoader.loadIndexImplementations(AbstractGraphDatabase.java:986)
    at org.neo4j.kernel.AbstractGraphDatabase$DefaultKernelExtensionLoader.init(AbstractGraphDatabase.java:958)
    at org.neo4j.kernel.LifeSupport$LifecycleInstance.init(LifeSupport.java:362)
    at org.neo4j.kernel.LifeSupport.init(LifeSupport.java:76)
    at org.neo4j.kernel.LifeSupport.start(LifeSupport.java:110)
    at org.neo4j.kernel.AbstractGraphDatabase.run(AbstractGraphDatabase.java:178)
    at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:69)
    at org.neo4j.server.NeoServerBootstrapper$1.createDatabase(NeoServerBootstrapper.java:65)
    at org.neo4j.server.database.Database.createDatabase(Database.java:80)
    at org.neo4j.server.database.Database.<init>(Database.java:63)
    at org.neo4j.server.NeoServerWithEmbeddedWebServer.startDatabase(NeoServerWithEmbeddedWebServer.java:186)
    at org.neo4j.server.NeoServerWithEmbeddedWebServer.start(NeoServerWithEmbeddedWebServer.java:97)
    at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:87)
    at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:52)
2013-03-14 11:26:28.160+0000: TM shutting down
2013-03-14 11:26:28.382+0000: Closed log /home/biju/graph_db/neo4j-community-1.7.M01/data/graph.db/nioneo_logical.log
2013-03-14 11:26:28.945+0000: NeoStore closed
2013-03-14 11:26:28.946+0000: --- SHUTDOWN diagnostics START ---
2013-03-14 11:26:28.947+0000: --- SHUTDOWN diagnostics END ---

当我在我的机器上安装ElasticSearch时，就开始发生这种情况了。启动Elastic搜索“JAVA_HOME问题”存在一个问题，该搜索已排序。

Answer 1

当我第一次在Linux笔记本电脑上安装Neo4j时遇到了这样的问题，我解决了在 /etc/security/limits.conf 文件末尾放置这几行的问题：

user               hard    nofile          100000
user               soft    nofile          40000

其中 user 是启动Neo4j的用户的登录名。 10000 和 40000 有点arbirtrary，他们对我没问题，万一你仍然会收到错误，试着增加它们。

Answer 2

如果你有一个带有这个问题的数据库，升级不会让它消失。 1.8.2会阻止这种情况发生。你正在运行社区我看到所以保持旧的日志不是那么必要。尝试删除现有的lucene.log.v318文件，或至少移开它，看看下次启动时会发生什么。

Neo4j服务器无法启动

2 个答案: