If you look at VisualVM metadata, it'll show that what's return is java.lang.Object which is different than Meters or Counters.
Looking at the source for metrics-core, it seems that this is a "feature" of Gauges because unlike Meters or Counters, Gauges can be of various types -- long, double, etc. Cassandra source sets them up as longs, however the JMXReporter class in metrics-core always exposes them as Objects. On Mon, Aug 4, 2014 at 7:32 PM, Patricia Gorla <patri...@thelastpickle.com> wrote: > Mike, > > What metrics reporter are you using? How are you attempting to access the > metric? > > > > On Sat, Aug 2, 2014 at 7:30 AM, mike <maomao...@gmail.com> wrote: > >> Dear All >> >> We are trying to monitor Cassandra using JMX. The monitoring tool we >> are using works fine for meters, However, if the metrcis are collected >> using gauge, the data type is object, then, our tool treat it as a string >> instead of a double. for example >> >> org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Capacity >> >> The Type of Attribute (Value) is java.lang.Object >> >> is it possible to implement the datatype of gauge as numeric types >> instead of object, or other way around for example using metric >> reporter...etc? >> >> Thanks a lot for any suggestion! >> >> Best Regard! >> Mike >> >> >> >> > > > -- > Patricia Gorla > @patriciagorla > > Consultant > Apache Cassandra Consulting > http://www.thelastpickle.com <http://thelastpickle.com> > -- *Ken Hancock *| System Architect, Advanced Advertising SeaChange International 50 Nagog Park Acton, Massachusetts 01720 ken.hanc...@schange.com | www.schange.com | NASDAQ:SEAC <http://www.schange.com/en-US/Company/InvestorRelations.aspx> Office: +1 (978) 889-3329 | [image: Google Talk:] ken.hanc...@schange.com | [image: Skype:]hancockks | [image: Yahoo IM:]hancockks [image: LinkedIn] <http://www.linkedin.com/in/kenhancock> [image: SeaChange International] <http://www.schange.com/>This e-mail and any attachments may contain information which is SeaChange International confidential. The information enclosed is intended only for the addressees herein and may not be copied or forwarded without permission from SeaChange International.