Hi Mete, No I didn't forget to attach it but somehow it got lost on the way. Here is my second try.
I had looked at this bug report but I am not sure if the two are related as I am seeing a different exception and I'm not using branch and merge. Damien
On Jan 17, 2013, at 11:37 AM, Mete Atamel <[email protected]> wrote: > Hi Damien, > > I think you forgot to attach the Junit test? Also, there's an open bug [0] > on something similar. Maybe the two are related? If so, please add > comments/Junit test to OAK-560. Thanks. > > -Mete > > [0] https://issues.apache.org/jira/browse/OAK-560 > > On 1/17/13 11:27 AM, "Damien Obrist" <[email protected]> wrote: > >> Hi, >> >> I am working on my master thesis at Adobe and within the context of my >> project I am currently looking into implementing parts of a MicroKernel >> using Apache HBase and some scalability / performance tests. Doing so I >> have encountered a concurrency-related issue with the MongoMicroKernel. >> It seems that there is a problem when lots of threads try to commit new >> nodes concurrently. >> >> I have attached a JUnit test which reproduces the error. The test creates >> 16 microkernels, each committing two nodes in a separate thread. Some >> threads will throw an exception saying that the node they're trying to >> commit already exists. This cannot be the case however, as the nodes >> added by different threads do not overlap / conflict. No exceptions are >> thrown if setting the number of threads to some lower number, but I have >> observed that in this case the problem still exists when trying to add a >> larger number of nodes (more than just 2). >> >> Maybe this is a known issue but since I haven't found a corresponding bug >> report I thought I'd share this on the list. Also, please let me know if >> I'm not following protocol as I am new to Oak and open source in general >> :) >> >> Best, >> Damien >
