我试图通过在neo4j.conf中设置“dbms.allow_format_migration = true”来使用自动迁移功能从Neo4j 2.3.3移动到3.0.0（就像所有2.X升级一样）。
不幸的是，我在没有访问我的数据的情况下获得了一些错误：
2016-05-11 16:32:15.684+0000 INFO Starting...
2016-05-11 16:32:16.576+0000 INFO Bolt enabled on localhost:7687.
2016-05-11 16:32:16.724+0000 INFO Starting upgrade of database
2016-05-11 16:32:16.942+0000 INFO Migrating Indexes (1/3):
2016-05-11 16:32:16.947+0000 INFO 10% completed
2016-05-11 16:32:16.948+0000 INFO 20% completed
2016-05-11 16:32:16.948+0000 INFO 30% completed
2016-05-11 16:32:16.948+0000 INFO 40% completed
2016-05-11 16:32:16.948+0000 INFO 50% completed
2016-05-11 16:32:16.948+0000 INFO 60% completed
2016-05-11 16:32:16.949+0000 INFO 70% completed
2016-05-11 16:32:16.949+0000 INFO 80% completed
2016-05-11 16:32:16.949+0000 INFO 90% completed
2016-05-11 16:32:16.949+0000 INFO 100% completed
2016-05-11 16:32:16.949+0000 INFO Migrating Legacy indexes (2/3):
2016-05-11 16:32:17.616+0000 ERROR Failed to start Neo4j: Starting Neo4j failed: Component 'org.neo4j.server.database.LifecycleManagingDatabase@768767a1' was successfully initialized, but failed to start. Please see attached cause exception. Starting Neo4j failed: Component 'org.neo4j.server.database.LifecycleManagingDatabase@768767a1' 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@768767a1' 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:217)
at org.neo4j.server.ServerBootstrapper.start(ServerBootstrapper.java:81)
at org.neo4j.server.ServerBootstrapper.start(ServerBootstrapper.java:60)
at org.neo4j.server.CommunityEntryPoint.main(CommunityEntryPoint.java:28)
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.server.database.LifecycleManagingDatabase@768767a1' was successfully initialized, but failed to start. Please see attached cause exception.
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:444)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
at org.neo4j.server.AbstractNeoServer.start(AbstractNeoServer.java:189)
... 3 more
Caused by: java.lang.RuntimeException: Error starting org.neo4j.kernel.impl.factory.CommunityFacadeFactory, /usr/local/Cellar/neo4j/3.0.0/libexec/data/databases/graph_ito.db
at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:144)
at org.neo4j.kernel.impl.factory.CommunityFacadeFactory.newFacade(CommunityFacadeFactory.java:40)
at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:108)
at org.neo4j.server.CommunityNeoServer.lambda$static$32(CommunityNeoServer.java:55)
at org.neo4j.server.database.LifecycleManagingDatabase.start(LifecycleManagingDatabase.java:89)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:434)
... 5 more
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.NeoStoreDataSource@10b461e3' was successfully initialized, but failed to start. Please see attached cause exception.
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:444)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
at org.neo4j.kernel.impl.transaction.state.DataSourceManager.start(DataSourceManager.java:99)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:434)
at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:107)
at org.neo4j.kernel.impl.factory.GraphDatabaseFacadeFactory.newFacade(GraphDatabaseFacadeFactory.java:140)
... 10 more
Caused by: org.neo4j.kernel.impl.storemigration.StoreUpgrader$UnableToUpgradeException: Failure doing migration
at org.neo4j.kernel.impl.storemigration.StoreUpgrader.migrateToIsolatedDirectory(StoreUpgrader.java:248)
at org.neo4j.kernel.impl.storemigration.StoreUpgrader.migrateIfNeeded(StoreUpgrader.java:132)
at org.neo4j.kernel.impl.storemigration.DatabaseMigrator.migrate(DatabaseMigrator.java:98)
at org.neo4j.kernel.NeoStoreDataSource.upgradeStore(NeoStoreDataSource.java:554)
at org.neo4j.kernel.NeoStoreDataSource.start(NeoStoreDataSource.java:433)
at org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:434)
... 15 more
Caused by: java.io.IOException: Legacy index migration failed.
at org.neo4j.kernel.impl.storemigration.participant.LegacyIndexMigrator.migrateLegacyIndexes(LegacyIndexMigrator.java:127)
at org.neo4j.kernel.impl.storemigration.participant.LegacyIndexMigrator.migrate(LegacyIndexMigrator.java:77)
at org.neo4j.kernel.impl.storemigration.StoreUpgrader.migrateToIsolatedDirectory(StoreUpgrader.java:240)
... 20 more
Caused by: org.neo4j.upgrade.lucene.LegacyIndexMigrationException: Migration of legacy index at path:/usr/local/Cellar/neo4j/3.0.0/libexec/data/databases/graph_ito.db/upgrade/index/lucene/node/Hr failed.
at org.neo4j.upgrade.lucene.LuceneLegacyIndexUpgrader.upgradeIndexes(LuceneLegacyIndexUpgrader.java:114)
at org.neo4j.kernel.impl.storemigration.participant.LegacyIndexMigrator.migrateLegacyIndexes(LegacyIndexMigrator.java:121)
... 22 more
Caused by: org.apache.lucene.index.IndexFormatTooOldException: Format version is not supported (resource BufferedChecksumIndexInput(MMapIndexInput(path="/usr/local/Cellar/neo4j/3.0.0/libexec/data/databases/graph_ito.db/upgrade/index/lucene/node/Hr/segments_1"))): -11 (needs to be between 1071082519 and 1071082519). This version of Lucene only supports indexes created with release 4.0 and later.
at org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:299)
at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:493)
at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:490)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:731)
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:683)
at org.apache.lucene.index.SegmentInfos.readLatestCommit(SegmentInfos.java:490)
at org.apache.lucene.index.DirectoryReader.listCommits(DirectoryReader.java:257)
at org.apache.lucene.index.IndexUpgrader.upgrade(IndexUpgrader.java:158)
at org.apache.lucene.index.IndexUpgrader.main(IndexUpgrader.java:78)
at org.neo4j.upgrade.lucene.IndexUpgraderWrapper.upgradeIndex(IndexUpgraderWrapper.java:66)
at org.neo4j.upgrade.lucene.LuceneLegacyIndexUpgrader.upgradeIndexes(LuceneLegacyIndexUpgrader.java:109)
... 23 more
有什么想法吗？
答案 0 :(得分：1)
从Neo4j Github Issue引用，我能够通过从neo4j索引中删除一些文件来解决问题。
我不得不删除${GRAPH_DATABASE}/index/lucene/node/index/segment*文件，然后重新启动neo4j服务器为我做了诀窍。
您可以参考github问题链接以获取详细信息。此外，您还可以删除错误日志中指出的文件，
引起：java.lang.IllegalArgumentException：调用了此工具 不删除先前的提交点，但以下提交是 发现：[DirectoryReader.ReaderCommit（segments_3）， DirectoryReader.ReaderCommit（segments_5）]
注意：我正在从2.3.0-M03迁移到3.0.1。