Neo4J 1.6.M02 Base de datos parece dañada; ¿Cómo lo recupero?

Question

Tengo una instancia de Neo4J en una máquina Ubuntu que se cerró mientras el servicio estaba en marcha. Como consecuencia, ahora el servicio se niega a comenzar:

Starting Neo4j Server... process [3807]... waiting for server to be ready.. BAD.
Neo4j Server may have failed to start, please check the logs.

y los registros ...

Feb 16, 2012 4:44:51 PM org.neo4j.server.logging.Logger log
INFO: Store files missing, or not in suitable state for upgrade. Leaving this problem for main server process to resolve.
Feb 16, 2012 4:44:51 PM org.neo4j.server.logging.Logger log
INFO: Starting Neo Server on port [7474] with [20] threads available
Feb 16, 2012 4:44:51 PM org.mortbay.log.Slf4jLog info
INFO: Logging to org.slf4j.impl.JDK14LoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog
Feb 16, 2012 4:44:51 PM org.neo4j.server.logging.Logger log
INFO: Using database at /home/dan/personal/neo4j-community-1.6.M02/data/graph.db
Feb 16, 2012 4:44:52 PM org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog doInternalRecovery
INFO: Non clean shutdown detected on log [/home/dan/personal/neo4j-community-1.6.M02/data/graph.db/nioneo_logical.log.1]. Recovery started ...

cualquier idea de cómo puede

1. recuperar la base de datos?
2. Evite que esto vuelva a suceder si la máquina falla nuevamente?

Gracias

Actualizar:Intenté correr sudo ./bin/neo4j-shell -path data/graph.db/ y esta es la salida

Feb 16, 2012 3:57:16 PM org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog doInternalRecovery
INFO: Non clean shutdown detected on log [/home/dan/personal/neo4j-community-1.6.M02/data/graph.db/nioneo_logical.log.1]. Recovery started ...
org.neo4j.graphdb.TransactionFailureException: Could not create data source [nioneodb], see nested exception for cause of error
    at org.neo4j.kernel.impl.transaction.TxModule.registerDataSource(TxModule.java:161)
    at org.neo4j.kernel.GraphDbInstance.start(GraphDbInstance.java:104)
    at org.neo4j.kernel.EmbeddedGraphDbImpl.<init>(EmbeddedGraphDbImpl.java:190)
    at org.neo4j.kernel.EmbeddedGraphDatabase.<init>(EmbeddedGraphDatabase.java:78)
    at org.neo4j.shell.kernel.GraphDatabaseShellServer.instantiateGraphDb(GraphDatabaseShellServer.java:85)
    at org.neo4j.shell.kernel.GraphDatabaseShellServer.<init>(GraphDatabaseShellServer.java:57)
    at org.neo4j.shell.StartClient.tryStartLocalServerAndClient(StartClient.java:286)
    at org.neo4j.shell.StartClient.startLocal(StartClient.java:219)
    at org.neo4j.shell.StartClient.start(StartClient.java:159)
    at org.neo4j.shell.StartClient.main(StartClient.java:108)
Caused by: java.lang.RuntimeException: Unexpected Exception
    at org.neo4j.helpers.Exceptions.launderedException(Exceptions.java:78)
    at org.neo4j.helpers.Exceptions.launderedException(Exceptions.java:48)
    at org.neo4j.helpers.Exceptions.launderedException(Exceptions.java:43)
    at org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.<init>(NeoStoreXaDataSource.java:216)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at org.neo4j.kernel.impl.transaction.XaDataSourceManager.create(XaDataSourceManager.java:77)
    at org.neo4j.kernel.impl.transaction.TxModule.registerDataSource(TxModule.java:155)
    ... 9 more
Caused by: java.io.IOException: Inject start failed, xid: GlobalId[NEOKERNL|3992629294259512899|39], BranchId[ 52 49 52 49 52 49 ] already injected
    at org.neo4j.kernel.impl.transaction.xaframework.XaResourceManager.injectStart(XaResourceManager.java:118)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.applyStartEntry(XaLogicalLog.java:486)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.applyEntry(XaLogicalLog.java:445)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.doInternalRecovery(XaLogicalLog.java:815)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.open(XaLogicalLog.java:241)
    at org.neo4j.kernel.impl.transaction.xaframework.XaLogicalLog.open(XaLogicalLog.java:187)
    at org.neo4j.kernel.impl.transaction.xaframework.XaContainer.openLogicalLog(XaContainer.java:120)
    at org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.<init>(NeoStoreXaDataSource.java:177)
    ... 15 more
ERROR (-v for expanded information):
    Could not create data source [nioneodb], see nested exception for cause of error

 -host      Domain name or IP of host to connect to (default: localhost)
 -port      Port of host to connect to (default: 1337)
 -name      RMI name, i.e. rmi://<host>:<port>/<name> (default: shell)
 -pid       Process ID to connect to
 -c         Command line to execute. After executing it the shell exits
 -readonly  Connect in readonly mode
 -path      Points to a neo4j db path so that a local server can be started there
 -config    Points to a config file when starting a local server

Example arguments for remote:
    -port 1337
    -host 192.168.1.234 -port 1337 -name shell
    -host localhost -readonly
    ...or no arguments for default values
Example arguments for local:
    -path /path/to/db
    -path /path/to/db -config /path/to/neo4j.config
    -path /path/to/db -readonly

Answer 1

Ok, desafortunadamente está ejecutando 1.6.m02, que tiene este problema conocido que puede poner su DB en este estado. 1.6 no tiene este problema. Había otro DB que tenía este problema en la lista de correo Neo4J, así que creé esta herramienta: http://pastebin.com/kustcagm Para arreglar un registro tan roto. ¿Te sentirías cómodo compilando y ejecutando eso? De lo contrario, podría armar un frasco agrupado acompañó un guión como:

$ ./fix-double-start-récord-emits my/db

y enviarte de alguna manera.