@Override
    protected void endAttempt(ConnectionStats stats, long start) {
      stats.endPut(start, hasTimedOut(), hasFailed());
    }
Process a response that contains an ack.

@param msg the message containing the response
@param con Connection on which this op is executing
@throws Exception if response could not be processed or we received a response with a server
        exception.
@since GemFire 6.1
geode-core/src/main/java/org/apache/geode/cache/client/internal/PutOp.java