Make AgentConnectTaskPool core and max pool sizes configurable via global config by nvazquez · Pull Request #13552 · apache/cloudstack

nvazquez · 2026-07-06T17:15:27Z

Description

This PR replaces the hardcoded values of 100/500 in initConnectExecutor() with ConfigKeys:

agent.connect.executor.core.pool.size (default 100) and
agent.connect.executor.max.pool.size (default 500)

In case the pool size > max pool size, the default values 100/500 will be used to prevent exceptions on startup

Types of changes

Breaking change (fix or feature that would cause existing functionality to change)
New feature (non-breaking change which adds functionality)
Bug fix (non-breaking change which fixes an issue)
Enhancement (improves an existing feature and functionality)
Cleanup (Code refactoring and cleanup, that may add test cases)
Build/CI
Test (unit or integration test code)

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…obal config (apache#839) Replaces hardcoded values of 100/500 in initConnectExecutor() with ConfigKeys agent.connect.executor.core.pool.size (default 100) and agent.connect.executor.max.pool.size (default 500).

nvazquez · 2026-07-06T17:17:58Z

@blueorangutan package

blueorangutan · 2026-07-06T17:20:04Z

@nvazquez a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

codecov · 2026-07-06T17:23:51Z

Codecov Report

❌ Patch coverage is 12.50000% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 18.77%. Comparing base (4262c02) to head (f4ec900).
⚠️ Report is 26 commits behind head on 4.22.

Files with missing lines	Patch %	Lines
...java/com/cloud/agent/manager/AgentManagerImpl.java	12.50%	14 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               4.22   #13552      +/-   ##
============================================
+ Coverage     17.67%   18.77%   +1.10%     
- Complexity    15796    15832      +36     
============================================
  Files          5923     5476     -447     
  Lines        533347   495373   -37974     
  Branches      65248    58203    -7045     
============================================
- Hits          94253    92992    -1261     
+ Misses       428435   391889   -36546     
+ Partials      10659    10492     -167

Flag	Coverage Δ
uitests	`?`
unittests	`18.77% <12.50%> (+0.02%)`	⬆️

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blueorangutan · 2026-07-06T18:25:33Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 18480

Damans227 · 2026-07-06T19:46:30Z


    private void initConnectExecutor() {
-        _connectExecutor = new ThreadPoolExecutor(100, 500, 60L, TimeUnit.SECONDS, new LinkedBlockingQueue<>(), new NamedThreadFactory("AgentConnectTaskPool"));
+        _connectExecutor = new ThreadPoolExecutor(AgentConnectExecutorCorePoolSize.value(), AgentConnectExecutorMaxPoolSize.value(), 60L, TimeUnit.SECONDS, new LinkedBlockingQueue<>(), new NamedThreadFactory("AgentConnectTaskPool"));


Why no validation here? If max ends up lower than core, this throws and crashes management server startup. Maybe clamp the values before use so a bad config doesn't break things.

Thanks @Damans227 - added a validation. Can you please review?

Thanks @nvazquez, looks good. One question: should the max check be agentConnectMaxSize <= 0? ThreadPoolExecutor requires max to be strictly positive, so setting both keys to 0 passes validation but still throws at startup.

vladimirpetrov

LGTM based on manual testing. Tested with simultaneously restarting all the agents, which are more than the max pool size.

vladimirpetrov · 2026-07-10T16:29:29Z

@blueorangutan test

blueorangutan · 2026-07-10T16:30:04Z

@vladimirpetrov a [SL] Trillian-Jenkins test job (ol8 mgmt + kvm-ol8) has been kicked to run smoke tests

blueorangutan · 2026-07-11T09:02:05Z

[SF] Trillian test result (tid-16525)
Environment: kvm-ol8 (x2), zone: Advanced Networking with Mgmt server ol8
Total time taken: 56284 seconds
Marvin logs: https://github.com/blueorangutan/acs-prs/releases/download/trillian/pr13552-t16525-kvm-ol8.zip
Smoke tests completed. 148 look OK, 1 have errors, 0 did not run
Only failed and skipped tests results shown below:

Test	Result	Time (s)	Test File
test_02_upgrade_kubernetes_cluster	`Failure`	581.82	test_kubernetes_clusters.py

nvazquez · 2026-07-15T00:22:38Z

@blueorangutan package

blueorangutan · 2026-07-15T00:24:04Z

@nvazquez a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

blueorangutan · 2026-07-15T01:31:24Z

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 18575

vladimirpetrov · 2026-07-15T14:58:49Z

@blueorangutan test

vladimirpetrov

LGTM, tested with core > max and invalid values.

Make AgentConnectTaskPool core and max pool sizes configurable via gl…

d5cb403

…obal config (apache#839) Replaces hardcoded values of 100/500 in initConnectExecutor() with ConfigKeys agent.connect.executor.core.pool.size (default 100) and agent.connect.executor.max.pool.size (default 500).

nvazquez added this to the 4.22.2 milestone Jul 6, 2026

nvazquez requested review from Damans227, Pearl1594, sureshanaparti and vladimirpetrov July 6, 2026 17:15

nvazquez added the enhancement label Jul 6, 2026

boring-cyborg Bot added component:agent component:orchestration labels Jul 6, 2026

Damans227 reviewed Jul 6, 2026

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vladimirpetrov approved these changes Jul 10, 2026

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nvazquez added 2 commits July 14, 2026 21:11

Add validation for the setting values

0b31ca0

Fix

f4ec900

nvazquez requested a review from Damans227 July 15, 2026 00:22

vladimirpetrov approved these changes Jul 15, 2026

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Description

Types of changes

Feature/Enhancement Scale or Bug Severity

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nvazquez commented Jul 6, 2026 •

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