Concurent access with read-only embedded database

[vlg]

Hello there,

Is it possible to use a read-only embbeded database with multiple concurent accesses ?

I've a web application which calls multiple web-services using asynchronous AJAX, all of them accessing data through a read-only embedded database. Everything seems fines with one or two calls, but with more accesses, I get the following exception:

org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out:

NativeFSLock@/store/neo/AID884/index/lucene/node/node_auto_index/write.lock

Any idea ?

Thanks :)

-----------------------------------------------------

Context:

Windows Server 2008 x64

Neo4j 1.8

Java 1.6 u41-b02

Database opened in read-only mode

[Peter Neubauer]

Hi there,
I don't think the ReadOnly database is tested or intended to be used
in product from different threads, etc. IMHO it is MUCH better to
either share a normal Neo4j instance between the apps in one VM as a
singleton, or use the HA setup to have full read slaves serving
different apps.

However, if you can reproduce this reliably in a test, it would be
great if you can fiel a bug?

/peter

Cheers,

/peter neubauer

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

The authoritative book on graph databases - http://graphdatabases.com
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