Take a look at the regionserver log for the server hosting the "events"
table region. If the server cannot load the coprocessor when opening the
region, you should see some errors in the log that will help pinpoint the
problem (like is the user running the regionserver process able to read the
file in HDFS?).
On Fri, Mar 21, 2014 at 10:38 AM, Ted Yu <[EMAIL PROTECTED]> wrote: