About Metrics update

[Ion Badita]

Hi,

A looked over the class 
org.apache.hadoop.metrics.spi.AbstractMetricsContext and i have a question:
why in the update(MetricsRecordImpl record) metricUpdates Map is not 
cleared after the updates are merged in metricMap. Because of this on 
every update() "old" increments are merged in metricMap. Is this the 
right behavior?
If i want to increment only one metric in the record using current 
implementation is not possible without modifying other metrics that are 
incremented rare.


Thanks
Ion