[SPARK-34488] Support task Metrics Distributions and executor Metrics Distributions in the REST API call for a specified stage

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.2
• Fix Version/s: 3.2.0
• Component/s: Spark Core
• Assignee: angerszhu
• Reporter: Ron Hu
• Created: 21/Feb/21 03:59
• Updated: 25/Mar/21 02:43
• Resolved: 24/Mar/21 13:51

Description

For a specific stage, it is useful to show the task metrics in percentile distribution.  This information can help users know whether or not there is a skew/bottleneck among tasks in a given stage.  We list an example in taskMetricsDistributions.json

Similarly, it is useful to show the executor metrics in percentile distribution for a specific stage. This information can show whether or not there is a skewed load on some executors.  We list an example in executorMetricsDistributions.json

 

We define withSummaries query parameter in the REST API for a specific stage as:

applications/<application_id>/<application_attempt/stages/<stage_id>/<stage_attempt>?withSummaries=[true|false]&quantiles=0.0,0.25,0.5,0.75,1.0

• When withSummaries=true, both task metrics in percentile distribution and executor metrics in percentile distribution are included in the REST API output.  The default value of withSummaries is false, i.e. no metrics percentile distribution will be included in the REST API output.
• Query parameter quantiles define the quantiles we use to calculate metrics distributions.  It takes effect only when withSummaries=true.  Its default value is 0.0,0.25,0.5,0.75,1.0.  

 

Issue Links

• links to: [Github] Pull Request #31611 (AngersZhuuuu)