Please take a look at hbase-6651 which improves thread safety of table pool.
Are you using hbase 0.94 ? Thanks On Jan 12, 2013, at 4:06 PM, Adrien Mogenet <[email protected]> wrote: > Hi there, > > I'm experiencing some issues with CP. I'm trying to implement an indexing > solution (inspired by Annop's slides). In pre-put, I trigger another Put() > in an external table (to build the secondary index). It works perfect for > one client, but when I'm inserting data from 2 separate clients, I met > issues with HTable object (the one used in pre-Put()), because it's not > thread-safe. I decided to move on TablePool and that fixed my issue. > > But if I increase the write-load (and concurrency) HBase is throwing a OOM > exception because it can't create new native threads. Looking at HBase > metrics "threads count", I see that roughly 3500 threads are created. > > I'm looking for documentation about how CPs are working with threads : > what/when should I protect against concurrency issues ? How may I solve my > issue ? > > Help is welcome :-) > > -- > Adrien Mogenet > 06.59.16.64.22 > http://www.mogenet.me
