On Tue, Sep 4, 2012 at 2:52 PM, Gen Liu <ge...@zynga.com> wrote: > We are running into a case that if the region server that serves meta table > is down, all request will timeouts because region lookup is not available.
Only requests to .META. fail (and most of the time, .META. info is cached so should be relatively rare to do .META. lookups). It should not be all requests. > It seems that regions that serve root and meta are the single point of > failure in HBase. They can be offline if a server crashes but they should be back on line soon enough; is this not your experience? > Is there a way to get rid of it? Does HBase give a higher recover priority to > meta and root table? > HBase gets .META. and -ROOT- back on line ahead of all other regions, yes. St.Ack
