I do
1. connect
2. disconnect
3. connect
as described in my original post.
Then I execute the following method:
try ( Transaction transaction = _gdbService.beginTx() ) {
Iterable<Relationship> relationships = node.getRelationships(Direction.
OUTGOING);
...
and the first line throws an exception with the following trace:
org.neo4j.graphdb.DatabaseShutdownException: This database is shutdown.
at org.neo4j.kernel.impl.core.ThreadToStatementContextBridge.
checkIfShutdown(ThreadToStatementContextBridge.java:80)
at org.neo4j.kernel.impl.core.ThreadToStatementContextBridge.instance(
ThreadToStatementContextBridge.java:54)
at org.neo4j.kernel.impl.core.NodeProxy.getRelationships(NodeProxy.java:140
)
at org.neo4j.kernel.impl.core.NodeProxy.getRelationships(NodeProxy.java:76)
at thesisPrototype.cfgUtilizer.cfgdb.GraphDatabase.
findAdjacentReachableNode(GraphDatabase.java:336)
at thesisPrototype.reconnaissanceCore.CFGDBTracer.hook(CFGDBTracer.java:92)
at thesisPrototype.rmiBridge.TracerProxy.hook(TracerProxy.java:16)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source
)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Please, .. I need to fix that issue as soon as possible and I would be more
than grateful for any help...
On Saturday, November 22, 2014 5:39:15 PM UTC+1, Markus Gutmann wrote:
>
> _gdbFactory = new GraphDatabaseFactory();
> _gdbService = _gdbFactory.newEmbeddedDatabase(_gdbPath);
> _gdbEngine = new ExecutionEngine(_gdbService);
> do some work
> disconnect from the gdbdo some workdisconnect from the gdb
>
> I am using a local Neo4j server instance and the Neo4j Java API to access
> a graph-database (gdb).
>
> I simply want to achieve the following workflow:
>
> 1. connect to the local gdb from a Java program
>
> I do this using:
>
> _gdbFactory = new GraphDatabaseFactory();
> _gdbService = _gdbFactory.newEmbeddedDatabase(_gdbPath);
> _gdbEngine = new ExecutionEngine(_gdbService);
>
> 2. then disconnect using.
>
> _gdbService.shutdown();
>
> 3. connect with another process to the same gdb
>
> e.g. with the locally installed Neo4j program.
>
> 4. disconnect from the gdb from this process
>
> e.g. by simply clicking the "stop" button at the Neo4j program.
>
> 5. again connect to the gdb with the Java program using again the same
> code as in 1.
>
> *Right now, point 5 is not working!*
>
> The use of
>
> GraphDatabaseService.shutdown().shutdown
>
> seems to finalize the gdb in some way that I cannot connect to it any more.
>
> After reconnecting I get an Exception which tells me: *"This database is
> shutdown!"*
>
> So, my question is:
>
> What is the common way to connect - disconnect - reconnect to a Neo4J gdb
> ? Is there an alternative to the shutdown-method from above?
>
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