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- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.

## Describe the proposal
<!-- Please use this for a concrete design proposal for functionality. -->
<!-- If you just want to request a new feature and discuss the possible business value, create a Feature Request. -->

We should collect the count of no provider available exception in MetricsFilter.

With: `RpcException.isNoInvokerAvailableAfterFilter()`

}
            if (e.isLimitExceed()) {
                eventType = MetricsEvent.Type.REQUEST_LIMIT;
            }
            if (e.isBiz()) {
                eventType = MetricsEvent.Type.BUSINESS_FAILED;
            }
            if (e.isSerialization()) {
                eventType = MetricsEvent.Type.CODEC_EXCEPTION;
            }
            if (e.isNetwork()) {
                eventType = MetricsEvent.Type.NETWORK_EXCEPTION;
            }
        }
        sampler.incOnEvent(invocation, eventType.getNameByType(side));
        onCompleted(invocation);
        sampler.incOnEvent(invocation, MetricsEvent.Type.TOTAL_FAILED.getNameByType(side));
    }
    private void rtTime(Invocation invocation) {
        Long endTime = System.currentTimeMillis();
        Long beginTime = (Long) invocation.get(METRIC_FILTER_START_TIME);
        Long rt = endTime - beginTime;
        sampler.addRT(invocation, rt);
    }
    private void onCompleted(Invocation invocation) {
        rtTime(invocation);
        sampler.dec(invocation, MetricsEvent.Type.PROCESSING.getNameByType(getSide(invocation)));
    }
}