Hi Chesnay,
You saved my day! Yes, the WordCount example
<https://github.com/apache/flink/blob/master/flink-examples/flink-examples-streaming/src/main/java/org/apache/flink/streaming/examples/wordcount/WordCount.java>
runs
too fast, about 20ms. I extended its running time, and also set
'metrics.reporter.stsd.interval: 1'. Guess what?! Metrics show up in
Datadog!
I will open a PR to add this tip to Metrics page
<https://ci.apache.org/projects/flink/flink-docs-release-1.3/monitoring/metrics.html>
to
help other newbies ramp up faster.
Thank you!
Bowen
On Mon, Mar 13, 2017 at 1:48 AM, Chesnay Schepler <ches...@apache.org>
wrote:
> Hello,
>
> yes, Flink can handle custom metrics. It is quite odd that you can see the
> system metrics but not your
> own; I don't see a problem with your code.
>
> How long is the job running? Since you create a metric for the flatMap
> operation the metric will only
> be exposed as long as the flatMap operation is active. Thus, if this
> operation takes less than 10 seconds
> (the default interval for all reporters) then it may never report it.
>
> Regards,
> Chesnay
>
> On 13.03.2017 08:48, Bowen Li wrote:
>
>> Hi guys,
>> I'm retrying to send some app related custom metrics from Flink to
>> Datadog via StatsD.
>>
>> I followed https://ci.apache.org/projects/flink/flink-docs-
>> release-1.2/monitoring/metrics.html to set up flink-conf.yaml and test
>> code
>>
>> like this
>>
>> // flink-conf.yaml
>>
>> metrics.reporters: stsd
>> metrics.reporter.stsd.class: org.apache.flink.metrics.stats
>> d.StatsDReporter
>> metrics.reporter.stsd.host: localhost
>> metrics.reporter.stsd.port: 8125
>>
>> metrics.scope.jm: bowen.jobmanager
>> metrics.scope.jm.job: bowen.jobmanager.bowen.job_name
>> metrics.scope.tm: bowen.taskmanager.<tm_id>
>>
>> metrics.scope.tm.job: bowen.taskmanager.<tm_id>.<job_name>
>> metrics.scope.task: bowen.taskmanager.<tm_id>.<job_name>.<task_name>.<
>> subtask_index>
>> metrics.scope.operator: bowen.taskmanager.<tm_id>.<
>> job_name>.<operator_name>.<subtask_index>
>>
>>
>> // test code, by modifying WordCount example
>>
>>
>> public static final class Tokenizer extends
>> RichFlatMapFunction<String, Tuple2<String, Integer>> {
>> private static final long serialVersionUID = 1L;
>>
>> private Counter counter;
>>
>> @Override
>> public void open(Configuration config) {
>> getRuntimeContext()
>> .getMetricGroup()
>> .addGroup("bowen.test")
>> .gauge("bowen.test.flink", new Gauge<Integer>() {
>> @Override
>> public Integer getValue() {
>> return 100;
>> }
>> }); // test custom metrics
>>
>> counter = getRuntimeContext()
>> .getMetricGroup()
>> .addGroup("bowen.test")
>> .counter("bowen.flink.metric"); // test custom metrics
>> counter.inc(100);
>> }
>>
>> @Override
>> public void flatMap(String value, Collector<Tuple2<String, Integer>>
>> out)
>> throws Exception {
>> // normalize and split the line
>> String[] tokens = value.toLowerCase().split("\\W+");
>>
>> // emit the pairs
>> for (String token : tokens) {
>> if (token.length() > 0) {
>> out.collect(new Tuple2<String, Integer>(token, 1));
>> }
>> }
>>
>> counter.inc(100);
>> }
>> }
>>
>> I found my Datadog received all system scope metrics, but non of my
>> custom metric. I researched all night but gained no progress. What did I
>> do
>> wrong? Flink is able to handle custom metrics right? I'd really appreciate
>> some guidance on sending custom metrics!
>>
>> Thank you very much!
>> Bowen
>>
>>
>
