Mit Desai created YUNIKORN-3121:
-----------------------------------
Summary: Add REST API Endpoint for Scheduling Order Visibility
Key: YUNIKORN-3121
URL: https://issues.apache.org/jira/browse/YUNIKORN-3121
Project: Apache YuniKorn
Issue Type: New Feature
Components: core - scheduler
Reporter: Mit Desai
h3. Summary
Add a new REST API endpoint that provides real-time visibility into the
evaluation order of queues and applications during YuniKorn scheduling cycles.
This enhancement will significantly improve debugging capabilities by allowing
operators to quickly identify which queues and applications are being processed
by the scheduler and in what order.
h3. Background
When debugging YuniKorn scheduling performance issues, operators often need to
understand which queues and applications are being evaluated during scheduling
cycles. Currently, this information is not easily accessible, requiring
operators to:
* Guess which applications might be causing scheduling delays
* Search through long lists of applications and queues without clear
prioritization
* Analyze complex log files to understand scheduling behavior
* Spend significant time identifying the root cause of scheduling latency
This lack of visibility makes it challenging to quickly pinpoint applications
or queues that might be monopolizing scheduler resources or causing performance
bottlenecks.
Add a new REST API endpoint that exposes the current scheduling evaluation
order, showing:
# {*}Queue Evaluation Order{*}: The sequence in which queues are being
processed
# {*}Application Order per Queue{*}: The order of applications within each
queue
# {*}Real-time Data{*}: Current state reflecting the scheduler's evaluation
logic
# {*}Structured Format{*}: Easy-to-parse JSON response for both human
operators and automated tools
h4. API Specification:
{*}Endpoint{*}: {{GET /ws/v1/partition/\{partitionName}/schedulingorder}}
{*}Response Format{*}:
{noformat}
[
{
"queueName": "root.production.high-priority",
"applicationIDs": [
"app-critical-workload-001",
"app-critical-workload-002"
]
},
{
"queueName": "root.production.default",
"applicationIDs": [
"app-batch-job-123",
"app-data-processing-456"
]
},
{
"queueName": "root.development",
"applicationIDs": [
"app-test-environment-789"
]
}
]
{noformat}
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