Only one active process at a time can access the storage files. What do you want to do?
Michael Am 06.03.2014 um 01:03 schrieb Reihane Boghrati <[email protected]>: > Hi, > > How can I load my database with multiple processes? > > This is my init function: > > static GraphDatabaseService graphDb; > private static final String DB_PATH = > "C:/Users/Reihane/Documents/Neo4j/default.graphdb"; > public boolean init() throws DBException { > if (graphDb == null) > graphDb = new > GraphDatabaseFactory().newEmbeddedDatabase(DB_PATH); > engine = new ExecutionEngine(graphDb); > return true; > } > > and this is the exception my code throws: > > java.lang.RuntimeException: Error starting > org.neo4j.kernel.EmbeddedGraphDatabase, > C:\Users\Reihane\Documents\Neo4j\default.graphdb > at > org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:333) > at > org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:63) > at > org.neo4j.graphdb.factory.GraphDatabaseFactory$1.newDatabase(GraphDatabaseFactory.java:92) > at > org.neo4j.graphdb.factory.GraphDatabaseBuilder.newGraphDatabase(GraphDatabaseBuilder.java:198) > at > org.neo4j.graphdb.factory.GraphDatabaseFactory.newEmbeddedDatabase(GraphDatabaseFactory.java:69) > at Neo4j.Neo4jClient.init(Neo4jClient.java:168) > at edu.usc.bg.base.DBWrapper.init(DBWrapper.java:62) > at edu.usc.bg.base.Client.executeDoLoad(Client.java:1013) > at edu.usc.bg.base.Client.runBG(Client.java:892) > at edu.usc.bg.BGMainClass.main(BGMainClass.java:41) > Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component > 'org.neo4j.kernel.StoreLockerLifecycleAdapter@7a536ac6' was successfully > initialized, but failed to start. Please see attached cause exception. > at > org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:504) > at org.neo4j.kernel.lifecycle.LifeSupport.start(LifeSupport.java:115) > at > org.neo4j.kernel.InternalAbstractGraphDatabase.run(InternalAbstractGraphDatabase.java:310) > ... 9 more > Caused by: org.neo4j.kernel.StoreLockException: Unable to obtain lock on > store lock file: C:\Users\Reihane\Documents\Neo4j\default.graphdb\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:87) > at > org.neo4j.kernel.StoreLockerLifecycleAdapter.start(StoreLockerLifecycleAdapter.java:44) > at > org.neo4j.kernel.lifecycle.LifeSupport$LifecycleInstance.start(LifeSupport.java:498) > ... 11 more > Caused by: java.io.IOException: Couldn't lock lock file > C:\Users\Reihane\Documents\Neo4j\default.graphdb\lock because another process > already holds the lock. > at > org.neo4j.kernel.impl.nioneo.store.FileLock.getLockFileBasedFileLock(FileLock.java:115) > at > org.neo4j.kernel.impl.nioneo.store.FileLock.getOsSpecificFileLock(FileLock.java:63) > at > org.neo4j.kernel.DefaultFileSystemAbstraction.tryLock(DefaultFileSystemAbstraction.java:89) > at org.neo4j.kernel.StoreLocker.checkLock(StoreLocker.java:74) > ... 13 more > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
