neo4j server not starting, gives error:- another server-process running it

[divyanshu das]

I am using EC2 with ubuntu 12.04.

I already have neo4j 1.6.1-community edition running on my ec2 production server and on my local machine with the same configurations.

I setup a test server today copied neo4j "data" folder from production to test ec2 instance and installed neo4j. but when i try to start, it gives error:-

>>sudo service neo4j-service start

WARNING: Detected a limit of 1024 for maximum open files, while a minimum value of 40000 is recommended.

WARNING: Problems with the operation of the server may occur. Please refer to the Neo4j manual regarding lifting this limitation.

Starting Neo4j Server... process [22796]... waiting for server to be ready......................................................................................................................... BAD.

 another server-process is running with []

I have already increased in the file limits ass metioned in the docs. I have tried removing and installing again. 

Is there something I am missing here?

[Michael Hunger]

can you try to run

bin/neo4j console to see the output and share it

Michael

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[divyanshu das]

when I try to run in console mode:-

>>sudo ./bin/neo4j console

WARNING: Detected a limit of 1024 for maximum open files, while a minimum value of 40000 is recommended.

WARNING: Problems with the operation of the server may occur. Please refer to the Neo4j manual regarding lifting this limitation.

Starting Neo4j Server console-mode...

10/13/12 12:40:45 PM org.neo4j.server.NeoServerWithEmbeddedWebServer INFO: Starting Neo Server on port [7474] with [40] threads available

10/13/12 12:40:45 PM org.neo4j.server.database.Database INFO: Using database at /mnt/neo4j-community-1.6.1/data/graph.db

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:77)

at org.neo4j.server.NeoServerBootstrapper$1.createDatabase(NeoServerBootstrapper.java:65)

at org.neo4j.server.database.Database.createDatabase(Database.java:81)

at org.neo4j.server.database.Database.<init>(Database.java:64)

at org.neo4j.server.NeoServerWithEmbeddedWebServer.startDatabase(NeoServerWithEmbeddedWebServer.java:181)

at org.neo4j.server.NeoServerWithEmbeddedWebServer.start(NeoServerWithEmbeddedWebServer.java:93)

at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:87)

at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:52)

Caused by: java.lang.IllegalStateException: Unable to lock store [/mnt/neo4j-community-1.6.1/data/graph.db/neostore], this is usually a result of some other Neo4j kernel running using the same store.

at org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.checkStorage(CommonAbstractStore.java:174)

at org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.<init>(CommonAbstractStore.java:102)

at org.neo4j.kernel.impl.nioneo.store.AbstractStore.<init>(AbstractStore.java:119)

at org.neo4j.kernel.impl.nioneo.store.NeoStore.<init>(NeoStore.java:78)

at org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.<init>(NeoStoreXaDataSource.java:214)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:532)

at org.neo4j.kernel.impl.transaction.XaDataSourceManager.create(XaDataSourceManager.java:77)

at org.neo4j.kernel.impl.transaction.TxModule.registerDataSource(TxModule.java:155)

... 10 more

10/13/12 12:40:45 PM org.neo4j.server.NeoServerBootstrapper SEVERE: 

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:77)

at org.neo4j.server.NeoServerBootstrapper$1.createDatabase(NeoServerBootstrapper.java:65)

at org.neo4j.server.database.Database.createDatabase(Database.java:81)

at org.neo4j.server.database.Database.<init>(Database.java:64)

at org.neo4j.server.NeoServerWithEmbeddedWebServer.startDatabase(NeoServerWithEmbeddedWebServer.java:181)

at org.neo4j.server.NeoServerWithEmbeddedWebServer.start(NeoServerWithEmbeddedWebServer.java:93)

at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:87)

at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:52)

Caused by: java.lang.IllegalStateException: Unable to lock store [/mnt/neo4j-community-1.6.1/data/graph.db/neostore], this is usually a result of some other Neo4j kernel running using the same store.

at org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.checkStorage(CommonAbstractStore.java:174)

at org.neo4j.kernel.impl.nioneo.store.CommonAbstractStore.<init>(CommonAbstractStore.java:102)

at org.neo4j.kernel.impl.nioneo.store.AbstractStore.<init>(AbstractStore.java:119)

at org.neo4j.kernel.impl.nioneo.store.NeoStore.<init>(NeoStore.java:78)

at org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource.<init>(NeoStoreXaDataSource.java:214)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:532)

at org.neo4j.kernel.impl.transaction.XaDataSourceManager.create(XaDataSourceManager.java:77)

at org.neo4j.kernel.impl.transaction.TxModule.registerDataSource(TxModule.java:155)

... 10 more

Exception in thread "main" java.lang.NullPointerException

at org.neo4j.server.Bootstrapper.start(Bootstrapper.java:96)

at org.neo4j.server.Bootstrapper.main(Bootstrapper.java:52)

[Michael Hunger]

If you're sure that there is no other server running,(check with ps) you can remove the lockfile in the db directory.

Sent from mobile device

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[Mattias Persson]

The presence of the lock file isn't preventing a startup though, it's whether it's locked or not. So deleting that file should never ever be required.

2012/10/13 Michael Hunger <michael...@neopersistence.com>

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--
Mattias Persson, [mat...@neotechnology.com]
Hacker, Neo Technology
www.neotechnology.com

[divyanshu das]

Last time, i checked with ps aux | grep neo4j.... saw one process, killed it and it started working. 

Now I am again setting up a new server, I followed exactly the same steps like earlier,

this time I am getting this error:-

mnt/neo4j-community-1.6.1/data$ sudo service neo4j-service start

WARNING: Detected a limit of 1024 for maximum open files, while a minimum value of 40000 is recommended.

WARNING: Problems with the operation of the server may occur. Please refer to the Neo4j manual regarding lifting this limitation.

Starting Neo4j Server... process [18187]... waiting for server to be ready......................................................................................................................... BAD.

 another server-process is running with []

I tried removing the lock file too, still getting same error.

[Peter Neubauer]

What Neo4j version are you using? Could you try with Neo4j 1.8?

Cheers,

/peter neubauer

G:  neubauer.peter
S:  peter.neubauer
P:  +46 704 106975
L:   http://www.linkedin.com/in/neubauer
T:   @peterneubauer

Neo4j 1.8 GA - http://www.dzone.com/links/neo4j_18_release_fluent_graph_literacy.html

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[divyanshu das]

I am using 1.6.1 community edition. The same configuration is working on a different aws server. Our current implementation has been developed on 1.6.1 Will there be any problems with 1.8 ? Are all cypher queries used in 1.6.1 supported in 1.8?

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[divyanshu das]

I was able to start the neo4j server in neo4j 1.8 version using:-

sudo service neo4j start-no-wait

Earlier I was getting a time-out error. 

On Monday, 5 November 2012 10:48:39 UTC+5:30, divyanshu das wrote:

I am using 1.6.1 community edition. The same configuration is working on a different aws server. Our current implementation has been developed on 1.6.1 Will there be any problems with 1.8 ? Are all cypher queries used in 1.6.1 supported in 1.8?