Not sure if this is what you're looking for, but api docs can be useful (I won't copy/paste the docs themselves)
http://www.datastax.com/drivers/java/2.0/com/datastax/driver/core/exceptions/NoHostAvailableException.html http://www.datastax.com/drivers/java/2.0/com/datastax/driver/core/exceptions/WriteTimeoutException.html (Not very helpful docs, but I would assume this shows up when the write_timeout_ms parameter from cassandra.yaml is exceeded. http://www.datastax.com/drivers/java/2.0/com/datastax/driver/core/exceptions/UnavailableException.html jvisualvm or jmc will have some good information on average write latencies which might point you in the right direction. On Mon, Nov 24, 2014 at 1:05 PM, Bulat Shakirzyanov <mallluh...@gmail.com> wrote: > Check out Ruby Driver documentation on these topics: > > Error Handling > <http://datastax.github.io/ruby-driver/features/error_handling/> > Retry Policies > <http://datastax.github.io/ruby-driver/features/retry_policies/> > > While the documentation is for the Ruby Driver, the concepts were borrowed > from and map directly to the Java Driver > > Cheers, > > On Mon, Nov 24, 2014 at 12:57 PM, Kevin Burton <bur...@spinn3r.com> wrote: > >> I’m trying to track down some exceptions in our production cluster. I >> bumped up our write load and now I’m getting a non-trivial number of these >> exceptions. Somewhere on the order of 100 per hour. >> >> All machines have a somewhat high CPU load because they’re doing other >> tasks. I’m worried that perhaps my background tasks are just overloading >> cassandra and one way to mitigate this is to nice them to least favorable >> priority (this is my first tasks). >> >> But I can’t seem to really track down any documentation on HOW to tune >> cassandra to prevent these. I mean I get the core theory behind all of this >> just need to track down the docs so I can actually RTFM :) >> >> >> >> -- >> >> Founder/CEO Spinn3r.com >> Location: *San Francisco, CA* >> blog: http://burtonator.wordpress.com >> … or check out my Google+ profile >> <https://plus.google.com/102718274791889610666/posts> >> <http://spinn3r.com> >> >> > > > -- > *Bulat Shakirzyanov* | Software Alchemist > > *a: *about.me/avalanche123 > *e:* mallluh...@gmail.com >
