Github user joshelser commented on the issue:
https://github.com/apache/accumulo/pull/260
> Is there an example of creating a new metric, or is it still all JMX
based?
Current "state of the art" is via Hadoop Metrics2. The metrics are exposed
via JMX, but it doesn't require you do write to JMX directly :). A rough
outline would be...
1. Add a metrics key to
https://github.com/apache/accumulo/blob/f81a8ec7410e789d11941351d5899b8894c6a322/server/tserver/src/main/java/org/apache/accumulo/tserver/metrics/TabletServerScanMetricsKeys.java
2. Update `add(String, long)` in
https://github.com/apache/accumulo/blob/f81a8ec7410e789d11941351d5899b8894c6a322/server/tserver/src/main/java/org/apache/accumulo/tserver/metrics/Metrics2TabletServerScanMetrics.java
(yuck, this is gross)
3. Update the RPC server implementation/code-path to invoke the metrics
methods a la
https://github.com/apache/accumulo/blob/b78edd3329cb7c981329fa2038a9352f79ab466d/server/tserver/src/main/java/org/apache/accumulo/tserver/TabletServer.java#L629-L632
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