# Cron Jobs Error with never run tasks
**URL:** https://forums.k8slens.dev/t/cron-jobs-error-with-never-run-tasks/5898
**Category:** Lens Support & Troubleshooting
**Created:** [April 17, 2025, 12:35pm UTC](https://forums.k8slens.dev/t/cron-jobs-error-with-never-run-tasks/5898 "2025-04-17T12:35:19Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@alarsen11](https://forums.k8slens.dev/u/alarsen11)
#### Post date: [April 17, 2025, 12:35pm UTC](https://forums.k8slens.dev/t/cron-jobs-error-with-never-run-tasks/5898/1 "2025-04-17T12:35:20Z")
Getting the below error when trying to access Cron Job from a namespace that has crons set to: \* \* 31 2 \*
at W ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008))
at cell ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7871495](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7871495))
at div
at div
at ee ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7866797](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7866797))
at div
at div
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:6456977](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:6456977)
at Me ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7870817](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7870817))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at div
at re ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7844811](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7844811))
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at div
at le ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5041757](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5041757))
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at div
at dt ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5055932](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5055932))
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at Z ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5459196](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5459196))
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at Q ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767))
at main
at div
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at Suspense
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4954274](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4954274)
at Q ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767))
at div
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at Suspense
at kde
at W ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008))
at Q ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at W ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at we ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:9211352](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:9211352))
at Object.apply ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023))
at A ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:6670427](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:6670427))
at Object.apply ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023))
at div
at Le ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5075880](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5075880))
at Object.apply ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at Object.apply ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023))
at Suspense
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4954274](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4954274)
at div
at div
at de
at div
at W ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5070201](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5070201))
at div
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at Suspense
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4954274](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4954274)
at Q ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767))
at div
at div
at div
at div
at W ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5070201](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5070201))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at Q ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4669767))
at W ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008))
at main
at div
at L ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7699638](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7699638))
at W ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008))
at L ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:701953](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:701953))
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at W ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1961008))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
at y ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:4951951))
at we ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:9211352](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:9211352))
at Object.apply ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023))
at A ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:6670427](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:6670427))
at Object.apply ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023))
at div
at Le ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5075880](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5075880))
at We ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5075589](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5075589))
at Object.apply ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1960563)
Error stack:
Error: Invalid explicit day of month definition
at new CronFieldCollection ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:474975](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:474975))
at CronExpressionParser.parse ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:470558](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:470558))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:3678182](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:3678182)
at Object.apply ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:7908023))
at renderTableContents ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:1086203](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:1086203))
at renderTableContents ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5461987](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5461987))
at le.getTableCells ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5042703](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5042703))
at children ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5043376](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:2:5043376))
at [https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1959599](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:1959599)
at It ([https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:2015263](https://lens.app:65190/build/lens.js?4d10baa3cd01f0041efa:8:2015263))
---
### Author:  [@crothmann](https://forums.k8slens.dev/u/crothmann)
#### Post date: [April 17, 2025, 1:40pm UTC](https://forums.k8slens.dev/t/cron-jobs-error-with-never-run-tasks/5898/2 "2025-04-17T13:40:05Z")
Hi @alarsen11
Thanks for reporting this, and great catch!
The issue is related to the cron expression `* * 31 2 *`, which refers to a **nonexistent date** — February 31st. Some cron parsing libraries (including the one we’re using) attempt to validate the expression and throw an error when it doesn’t match a real date.
While Kubernetes itself accepts such expressions without complaint (it simply skips those dates), our frontend currently doesn’t handle this gracefully and ends up crashing or failing to load the Cron Jobs.
The good news is: **we’re already working on a fix**
Thanks again for the heads-up — really appreciated!
---
### Author:  [@crothmann](https://forums.k8slens.dev/u/crothmann)
#### Post date: [June 8, 2026, 9:30am UTC](https://forums.k8slens.dev/t/cron-jobs-error-with-never-run-tasks/5898/3 "2026-06-08T09:30:20Z")
Good news — this is fixed. Please update to the current version 2026.5.250609, which includes the fix. The CronJobs page should load fine again.