Read more:

http://wiki.neo4j.org/content/Transactions#Nested_transactions
http://docs.neo4j.org/chunked/milestone/transactions.html

2011/2/17 David Montag <david.mon...@neotechnology.com>

> John,
>
> Are you doing tx.success() and tx.finish() when you commit? If so, then you
> likely already have an open transaction for that thread.
>
> If you start a new transaction while already in an open transaction, you
> will get a dummy transaction. It will not do anything when you commit it
> successfully, but if it fails, the parent transaction will fail. The data
> in
> the nested transaction only gets committed when the parent transaction
> commits. So if you've lost the reference to the top-level transaction,
> that's an issue.
>
> Also, if you'd like to share the code, I'd be glad to have a look at it.
>
> David
>
> On Wed, Feb 16, 2011 at 10:00 PM, John Howard <johnyho...@gmail.com>
> wrote:
>
> > We found this strange behaviour with regard to transactions ( we use
> > neo1.3-SNAPSHOT)
> > Here are the steps in our application:
> >
> > 1. created,indexed and commited 10 nodes successfully
> > 2. created, indexed and commited 40 nodes successfully
> > 3. created, indexed and commited 900 nodes successfully
> > 4. we found some app specific mistake in the step 3. So we removed
> indexes,
> > deleted 900 nodes and commited successfully.
> > 5. we tried to query those deleted nodes just to confirm whether delete
> was
> > successful.
> > 6. we were able to search for 900 (deleted)nodes from the index, and when
> > we
> > tried to access a property of a (deleted) node, it threw the following
> > exception:
> >  java.lang.IllegalStateException: Node[7599] has been deleted in this tx
> >    at
> >
> >
> org.neo4j.kernel.impl.core.LockReleaser.getCowPropertyRemoveMap(LockReleaser.java:445)
> >    at
> >
> >
> org.neo4j.kernel.impl.core.NodeManager.getCowPropertyRemoveMap(NodeManager.java:898)
> >    at
> > org.neo4j.kernel.impl.core.Primitive.getPropertyKeys(Primitive.java:99)
> >    at
> > org.neo4j.kernel.impl.core.NodeProxy.getPropertyKeys(NodeProxy.java:129)
> >    at
> > neopoc.data.util.graphManager.getNodesProperties(graphManager.java:771)
> >
> > 7. As a result of the above exception, it rolled back step 1 & 2 as well.
> > So
> > we lost all the nodes.
> >
> > My suspicion is, even though we committed successfullly in the steps 1,
> 2,
> > 3, 4, they were never internally committed. May be some kind of
> > differed/lazy commit and not immediate commit.
> >
> > Thank you for your assistance.
> >
> >  -
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> >
>
>
>
> --
> David Montag
> Neo Technology, www.neotechnology.com
> Cell: 650.556.4411
> david.mon...@neotechnology.com
> _______________________________________________
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>



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