I think for such a scenario you'd need read locks which gets upgraded to
write locks when modifying. Consider this simple scenario w/o read locks:
Thread ONE: get relationship R
Thread TWO: get relationship R
Thread TWO: delete relationship R and commit transaction
Thread ONE: do any modification
I'm definitely modifying the graph at the same time; that's why this is
happening. But my assumption was that that shouldn't be breaking Neo4j -- I
thought requests are transactional/serialized.
I don't have a repro test at the moment, but the behavior is really simple.
Here's an example analogy.
On Sun, Nov 20, 2011 at 10:43 PM, Andres Taylor
andres.tay...@neotechnology.com wrote:
Cypher in 1.4 was very experimental. If you are using Cypher, I would
suggest you move to 1.5 ASAP - a lot has happened there. If you still have
the same problems with 1.5, then we can start looking for the
Mattias, thanks for the suggestion, but to clarify, we're using the server
as-is, with the REST API; we're not using the Java API. Is there any way we
can specify locking like you suggest via the server config or similar?
Aseem
On Mon, Nov 21, 2011 at 12:26 AM, Mattias Persson
One more point of clarification: these are concurrent REST API requests.
One request is deleting a relationship, another request is querying for
a(nother) relationship.
A simple analogy is a user unliking one thing on Facebook then immediately
liking something else.
I wouldn't expect the
2011/11/21 Aseem Kishore aseem.kish...@gmail.com
One more point of clarification: these are concurrent REST API requests.
One request is deleting a relationship, another request is querying for
a(nother) relationship.
A simple analogy is a user unliking one thing on Facebook then immediately
Hey guys,
If we put our app under a bit of load, creating and removing nodes and
relationships concurrently, sometimes we get back a 500 Internal Server
Error from the REST API when we do a traverse or Cypher query. Here's an
example stack trace:
https://gist.github.com/1381423
We're running
On Mon, Nov 21, 2011 at 3:22 AM, Aseem Kishore aseem.kish...@gmail.comwrote:
Hey guys,
If we put our app under a bit of load, creating and removing nodes and
relationships concurrently, sometimes we get back a 500 Internal Server
Error from the REST API when we do a traverse or Cypher query.
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