jhkkhtd opened a new pull request, #21998:
URL: https://github.com/apache/flink/pull/21998
## What is the purpose of the change
1. To get **ClusterId** simple . such as yarn applicationId
2. when running job in **yarn-per-job or yarn-application** modeļ¼ we always
need to get **yarn applicationId** which is **clusterId** in
**ClusterClientProvider** of the **ClusterClientJobClientAdapter**,
ClusterClientJobClientAdapter is implement of **JobClient**
3. If we can get ClusterClientProvider, then we can get **clusterId** by
**jobClient.getClusterClientProvider().getClusterClient().getClusterId().toString()**
this will be very helpful .
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