[Improvement-17908][Flink] Make -sae parameter configurable in UI with default off #17909

chris-fast · 2026-01-27T09:02:53Z

What is the purpose of the change

The -sae (--shutdownOnAttachedExit) parameter was causing Flink tasks in YARN Application mode to terminate unexpectedly. Based on reviewer feedback, this parameter is now configurable via the UI instead of being hardcoded based on deploy mode.

Root Cause

Previously, the -sae parameter was automatically added for all non-APPLICATION modes. This hardcoded behavior didn't provide users with the flexibility to control this parameter based on their specific use cases.

Solution

Made the -sae parameter fully configurable through the UI:

Added a new shutdownOnAttachedExit field to FlinkParameters
Changed from hardcoded deployMode check to explicit configuration
Added UI switch control in the Flink task form
Default value: false (disabled for safety and backward compatibility)

Brief changelog

Added shutdownOnAttachedExit field to FlinkParameters with enhanced JavaDoc
Modified FlinkArgsUtils.buildRunCommandLine() to use configuration-based logic
Added UI switch control in Flink task form (positioned after Yarn Queue field)
Added comprehensive test cases covering all scenarios (null, false, true, APPLICATION mode)
Added Chinese and English i18n translations

Verifying this change

Code compilation pass
Unit tests updated and passing
Follows the project's code style (spotless)
Backward compatibility maintained

Test Cases Coverage

New test cases added:

testRunJarWithShutdownOnAttachedExitEnabled() - Explicitly enabled (true)
testRunJarWithShutdownOnAttachedExitDisabled() - Explicitly disabled (false)
testRunJarWithShutdownOnAttachedExitInApplicationMode() - APPLICATION mode with enabled

Existing tests updated:

All default behavior tests now expect no -sae parameter
Maintains test coverage for CLUSTER, LOCAL, and APPLICATION modes

Behavior Matrix

Scenario	shutdownOnAttachedExit	deployMode	`-sae` Added?
New task (default)	null	ANY	No (safe default)
Existing task	null	ANY	No (backward compatible)
Explicitly disabled	false	ANY	No
Explicitly enabled	true	CLUSTER	Yes
Explicitly enabled	true	LOCAL	Yes
Explicitly enabled	true	APPLICATION	Yes (user's choice)

Backward Compatibility

✅ Fully backward compatible:

Uses Boolean type (three-state: null/false/true)
null value represents existing tasks (no -sae parameter)
false value represents explicitly disabled
true value represents explicitly enabled
All existing Flink tasks continue to work without modification

UI Changes

A new switch control "Shutdown On Attached Exit" has been added to the Flink task configuration form:

Located between "Yarn Queue" and "Main Arguments" fields
Default: disabled (false)
When enabled, adds -sae parameter to Flink command
Translation provided in both Chinese and English

Related issues

Fixes #17908

…ent task termination The -sae (--shutdownOnAttachedExit) parameter is only suitable for attached mode where the CLI stays connected and waits for the job to complete. However, YARN Application mode runs in detached mode where the CLI exits after submission, causing the -sae parameter to trigger cluster shutdown and terminate the job unexpectedly. Changes: - Only add -sae parameter for non-APPLICATION deploy modes - Update test cases to reflect the new behavior

SbloodyS · 2026-01-27T09:59:57Z

...r-task-flink/src/main/java/org/apache/dolphinscheduler/plugin/task/flink/FlinkArgsUtils.java

+        // Note: -sae should NOT be used for APPLICATION mode, as it runs in detached mode on YARN
+        if (deployMode != FlinkDeployMode.APPLICATION) {
+            args.add(FlinkConstants.FLINK_SHUTDOWN_ON_ATTACHED_EXIT); // -sae
+        }


We should make it configurable in UI and set it as off by default.

chris-fast · 2026-01-27T10:17:00Z

Hi @SbloodyS , thank you for the review feedback!

I understand the requirement to make the -sae parameter configurable in UI with default as off.

Current Situation

The current PR removes -sae for APPLICATION mode only:

if (deployMode != FlinkDeployMode.APPLICATION) {
    args.add(FlinkConstants.FLINK_SHUTDOWN_ON_ATTACHED_EXIT);
}

Proposed Solution

I'''d like to propose adding a UI-configurable option for the -sae parameter:

Implementation Plan

Backend Changes:
- Add Boolean shutdownOnAttachedExit field to FlinkParameters.java
- Modify FlinkArgsUtils.java to use this config:
```
if (Boolean.TRUE.equals(flinkParameters.getShutdownOnAttachedExit())) {
    args.add(FlinkConstants.FLINK_SHUTDOWN_ON_ATTACHED_EXIT);
}
```
- Default value: null (disabled, parameter not added)
Frontend Changes:
- Add a checkbox in Flink task configuration UI
- Label: "Shutdown on Attached Exit" (with tooltip explaining)
- Default: unchecked (off by default as requested)

Benefits

✅ User can explicitly control -sae parameter
✅ Backward compatible (null = no parameter added)
✅ Default OFF as requested
✅ Clear UI indication

Questions

Before proceeding with implementation, I'''d like to confirm:

Default behavior: Should existing tasks (without this field) have -sae disabled by default?
- My proposal: Yes, default to disabled (null/false)
UI placement: Should the checkbox be shown for all deploy modes or only non-APPLICATION modes?
- My proposal: Show for all modes, user has full control
Alternative: Would you prefer a different approach?

Looking forward to your feedback! Thanks!

SbloodyS · 2026-01-28T02:17:01Z

@chris-fast Excellent. Your description is very accurate and correct. Please modify this PR according to your description.

…h default off Changes: - Add shutdownOnAttachedExit field to FlinkParameters with enhanced JavaDoc - Change logic from hardcoded deployMode check to configuration-based - Add UI switch control in Flink task form (positioned after Yarn Queue) - Add comprehensive test cases for all scenarios (null, false, true, APPLICATION mode) - Add Chinese and English i18n translations - Default value: false (disabled for safety and backward compatibility) This addresses the reviewer's feedback to make the -sae parameter configurable via UI instead of hardcoded behavior based on deploy mode. The implementation uses Boolean type (three-state: null/false/true) to ensure backward compatibility with existing tasks.

chris-fast · 2026-01-28T10:29:11Z

@SbloodyS I've updated the PR according to the plan, PTAL. Thanks!

.gitignore

dolphinscheduler-ui/src/views/projects/task/components/node/fields/use-flink.ts

...r-task-flink/src/main/java/org/apache/dolphinscheduler/plugin/task/flink/FlinkArgsUtils.java

SbloodyS

You should run pnpm run lint to format the frontend code. @chris-fast

- Remove unnecessary comment in FlinkArgsUtils.java line 270 - Remove unnecessary comment in use-flink.ts line 295 - Update .gitignore to remove AI tool directories

chris-fast · 2026-01-29T08:13:00Z

@SbloodyS

I've run pnpm run lint as you suggested. The linter auto-fixed dependencies-modal.tsx (missing .value for ref access) along with the targeted changes.

I've included this fix in the PR to ensure CI passes cleanly. This is a legitimate bug fix that prevents incorrect values from being emitted when closing the dependencies modal.

SbloodyS

LGTM

sonarqubecloud · 2026-01-29T09:33:29Z

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

ruanwenjun · 2026-01-29T10:59:10Z

...-task-flink/src/main/java/org/apache/dolphinscheduler/plugin/task/flink/FlinkParameters.java

+     *
+     * @see FlinkArgsUtils#buildRunCommandLine
+     */
+    private Boolean shutdownOnAttachedExit;


Right now we don't support take-over flink job when failover, these change might cause the flink job duplicated run on YARN?
And, it's better to make the default value to TRUE, do not break compatibility, as this is essentially a Flink bug.

I every agree with you on the compatibility point，keeping the default as TRUE is definitely the safest move.

And I want to clarify a few things regarding the underlying mechanism, though:

1.It's not really a "Flink bug"，-sae parameter was designed to prevent resource leaks (zombie clusters), not to handle duplicate submissions.

2.Relying on -sae=true to prevent "double runs" is actually pretty unreliable. If a worker hits a hard crash (like an OOM or power outage), the CLI dies instantly and never gets a chance to send the shutdown signal to the cluster. So, the job keeps running, and a retry will still cause a duplicate.

3.The better way to handle idempotency is via YARN Application Tags (e.g., using the ProcessInstanceId) and checking if that tag exists before submitting.

I think that "idempotency check" deserves to be a future optimization feature on its own. It’s probably better to keep it out of this current PR so we don't block the merge.

Thanks a lot for the feedback—I actually learned a ton digging into this! I’d be more than happy to help contribute code for that future optimization feature, too.

I think that "idempotency check" deserves to be a future optimization feature on its own. It’s probably better to keep it > out of this current PR so we don't block the merge.

+1

ruanwenjun

Please don't use AI tool to generat PR.

…ult enabled Changes: - Make shutdownOnAttachedExit field configurable via UI switch - Change default behavior from disabled to enabled (null/true -> add -sae) - When explicitly disabled (false), no parameter is added, relying on Flink's default behavior - Update FlinkArgsUtils logic from Boolean.TRUE.equals() to !Boolean.FALSE.equals() - Add comprehensive test coverage for all scenarios (null, true, false) - Update JavaDoc to reflect new default behavior - Add UI switch control positioned after Yarn Queue field - Add Chinese and English i18n translations This change prevents resource leakage and duplicate tasks during worker failover by enabling cluster shutdown when CLI terminates abruptly (default behavior). The implementation uses a simple approach: - Enabled (default): add -sae parameter - Disabled: don't add any parameter (rely on Flink default)

chris-fast added 2 commits January 27, 2026 16:44

Merge remote-tracking branch 'upstream/dev' into dev

39168c8

chris-fast requested review from Gallardot, SbloodyS and caishunfeng as code owners January 27, 2026 09:02

github-actions bot added backend test labels Jan 27, 2026

github-actions bot assigned chris-fast Jan 27, 2026

SbloodyS requested changes Jan 27, 2026

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SbloodyS changed the title ~~Fix 17908 flink sae parameter~~ [Fix-17908] Flink sae parameter issue Jan 27, 2026

SbloodyS added first time contributor First-time contributor improvement make more easy to user or prompt friendly labels Jan 27, 2026

SbloodyS changed the title ~~[Fix-17908] Flink sae parameter issue~~ [Improvement-17908] Flink sae parameter issue Jan 27, 2026

SbloodyS changed the title ~~[Improvement-17908] Flink sae parameter issue~~ [Improvement-17908] Flink sae parameter improvement Jan 27, 2026

SbloodyS added this to the 3.4.1 milestone Jan 27, 2026

chris-fast requested a review from songjianet as a code owner January 28, 2026 10:10

github-actions bot added the UI ui and front end related label Jan 28, 2026

chris-fast changed the title ~~[Improvement-17908] Flink sae parameter improvement~~ [Improvement-17908][Flink] Make -sae parameter configurable in UI with default off Jan 28, 2026

SbloodyS reviewed Jan 29, 2026

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dolphinscheduler-ui/src/views/projects/task/components/node/fields/use-flink.ts Outdated Show resolved Hide resolved

...r-task-flink/src/main/java/org/apache/dolphinscheduler/plugin/task/flink/FlinkArgsUtils.java Outdated Show resolved Hide resolved

SbloodyS reviewed Jan 29, 2026

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chris-fast added 2 commits January 29, 2026 15:54

style: remove unnecessary comments as review feedback

a3376ad

- Remove unnecessary comment in FlinkArgsUtils.java line 270 - Remove unnecessary comment in use-flink.ts line 295 - Update .gitignore to remove AI tool directories

fix: add missing .value for ref access in dependencies-modal.tsx

c4cc0da

Merge branch 'dev' into fix-17908-flink-sae-parameter

59366e1

SbloodyS previously approved these changes Jan 29, 2026

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SbloodyS requested a review from ruanwenjun January 29, 2026 09:00

ruanwenjun reviewed Jan 29, 2026

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chris-fast dismissed SbloodyS’s stale review via 170ac2a January 29, 2026 12:49

[Improvement-17908][Flink] Make -sae parameter configurable in UI with default off #17909

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[Improvement-17908][Flink] Make -sae parameter configurable in UI with default off #17909

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chris-fast commented Jan 27, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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What is the purpose of the change

Root Cause

Solution

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Behavior Matrix

Backward Compatibility

UI Changes

Related issues

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SbloodyS Jan 27, 2026

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chris-fast commented Jan 27, 2026

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SbloodyS commented Jan 28, 2026

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