take a look at mx4j http://wiki.apache.org/cassandra/Operations#Monitoring_with_MX4J
someone told me once you can call the JMX ops via http, i've not checked though. Cheers ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 16 Jun 2011, at 14:45, Jake Luciani wrote: > No force a node "down" you can use nodetool disablegossip > > On Wed, Jun 15, 2011 at 6:42 PM, Suan Aik Yeo <yeosuan...@gmail.com> wrote: > Thanks, Aaron, but we determined that adding Java into the equation just > brings in too much complexity for something that's called out of an Nginx > Perl module. Right now I'm having trouble even replicating the above scenario > and posted a question here: > http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Easy-way-to-overload-a-single-node-on-purpose-tt6480958.html > > > - Suan > > > On Thu, Jun 9, 2011 at 3:58 AM, aaron morton <aa...@thelastpickle.com> wrote: > None via thrift that I can recall, but the StorageService MBean exposes > getLiveNodes() this is what nodetool uses to see which nodes are live. > > From the code... > /** > * Retrieve the list of live nodes in the cluster, where "liveness" is > * determined by the failure detector of the node being queried. > * > * @return set of IP addresses, as Strings > */ > public List<String> getLiveNodes(); > > Hope that helps. > > ----------------- > Aaron Morton > Freelance Cassandra Developer > @aaronmorton > http://www.thelastpickle.com > > On 9 Jun 2011, at 17:56, Suan Aik Yeo wrote: > > > Is there a way (preferably an exposed method accessible through Thrift), > > from a running Cassandra node to determine whether or not itself is "up"? > > (Per Cassandra standards, I'm assuming based on the gossip protocol). > > Another way to think of what I'm looking for is basically running "nodetool > > ring" just on myself, but I'm only interested in knowing whether I'm "Up" > > or "Down"? > > > > I'm currently using the "describe_cluster" method, but earlier today when > > the commitlogs for a node filled up and it appeared down to the other > > nodes, describe_cluster() still worked fine, thus failing the check. > > > > Thanks, > > Suan > > > > > > -- > http://twitter.com/tjake
