druid

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History

Add a metric for task duration in the pending queue (#12492 )

This PR is to measure how long a task stays in the pending queue and emits the value with the metric task/pending/time. The metric is measured in RemoteTaskRunner and HttpRemoteTaskRunner.

An example of the metric:

```
2022-04-26T21:59:09,488 INFO [rtr-pending-tasks-runner-0] org.apache.druid.java.util.emitter.core.LoggingEmitter - {"feed":"metrics","timestamp":"2022-04-26T21:59:09.487Z","service":"druid/coordinator","host":"localhost:8081","version":"2022.02.0-iap-SNAPSHOT","metric":"task/pending/time","value":8,"dataSource":"wikipedia","taskId":"index_parallel_wikipedia_gecpcglg_2022-04-26T21:59:09.432Z","taskType":"index_parallel"}
```

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Key changed/added classes in this PR

    Emit metric task/pending/time in classes RemoteTaskRunner and HttpRemoteTaskRunner.
    Update related factory classes and tests.

2022-05-02 23:47:25 -04:00

_bin

De-incubation cleanup in code, docs, packaging (#9108 )

2020-01-03 12:33:19 -05:00

assets

Design/architecture doc touchups (#11762 )

2021-10-04 11:09:35 -07:00

comparisons

Update druid-vs-kudu.md (#11470 )

2021-07-21 22:58:14 +08:00

configuration

Worker level task metrics (#12446 )