Hi
My system is quite simple:
- two (one quad core, one dual core) servers with 2GB mem and 150 GB
allocated to dfs.
- I use it to crawl multiple supports but mainly filesystems and
save the results onto hbase (not too many files < 100.000 but rows can get
easily to 30 MB each)
I constantly getting NullPointerExceptions (on the client caused by
NotServingRegionExceptions on regionserver) when creating tables or
RegionOfflineExceptions when doing puts or sometimes just time outs.
When started with hbase I developed in 'local' mode, I then migrated
to a small dev 2 servers cluster (weaker than production is now) where I
tested the functionality, and it worked fine but, my bad, due to pressing
scheduling I didn't do any real load tests, so the system is now
continuously going under in production. I've only been able to do a full
crawl by resetting the cluster to one node and putting it in 'local' mode.
My question is what can cause regions to be offline in
regionservers?
I ask so that I can investigate the matter further but having a
starting point.
I'm willing to help anyway I can but I would really appreciate any
help and/or starting point and tools for my investigation.
Best Regards
David Alves
