Error 400

Open

#199 opened on May 22, 2025 6 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 25/100

Issue type: Bug
Clarity: Needs clarification
Activity status: Stale
Tech stack: go
Domain: authentication, observability

Research direction

No repository file or test is named. Start by tracing the metrics scraper around the login endpoint shown in the logs and reproduce the HTTP 400 response on an affected LTM; done means authentication remains reliable and metrics continue being collected.

Written by the indexing model from the issue text.

Description

This issue is happening on about half of our LTMs. We thought changing the username to a new one was a workaround, but it doesn't work consistently. We are able to get metrics from these systems for some period of time until we start getting these errors and no longer get metrics.

Since the logs don't show information on what LTM has the issue, we use a script to capture that information and place it in the log; thus the LTM name on each line.

bigip-77 2025-05-22T21:52:35.806Z info service@v0.123.0/service.go:264 Starting otelcol-custom... {"Version": "", "NumCPU": 8}
bigip-77 2025-05-22T21:52:35.806Z info extensions/extensions.go:41 Starting extensions...
bigip-77 2025-05-22T21:52:35.807Z info service@v0.123.0/service.go:287 Everything is ready. Begin running and processing data.
bigip-77 2025-05-22T21:52:35.837Z error scraperhelper@v0.119.0/obs_metrics.go:61 Error scraping metrics {"error": "endpoint /mgmt/shared/authn/login returned code 400"}
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper.wrapObsMetrics.func1
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/obs_metrics.go:61
bigip-77 go.opentelemetry.io/collector/scraper.ScrapeMetricsFunc.ScrapeMetrics
bigip-77 go.opentelemetry.io/collector/scraper@v0.119.0/metrics.go:24
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper.scrapeMetrics
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:256
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper.NewMetricsController.func1
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:228
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper.(*controller[...]).startScraping.func1
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:171
bigip-77 2025-05-22T21:54:35.837Z error scraperhelper@v0.119.0/obs_metrics.go:61 Error scraping metrics {"error": "endpoint /mgmt/shared/authn/login returned code 400"}
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper.wrapObsMetrics.func1
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/obs_metrics.go:61
bigip-77 go.opentelemetry.io/collector/scraper.ScrapeMetricsFunc.ScrapeMetrics
bigip-77 go.opentelemetry.io/collector/scraper@v0.119.0/metrics.go:24
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper.scrapeMetrics
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:256
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper.NewMetricsController.func1
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:228
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper.(*controller[...]).startScraping.func1
bigip-77 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:175
bigip-78 2025-05-22T21:54:49.285Z info service@v0.123.0/service.go:264 Starting otelcol-custom... {"Version": "", "NumCPU": 8}
bigip-78 2025-05-22T21:54:49.285Z info extensions/extensions.go:41 Starting extensions...
bigip-78 2025-05-22T21:54:49.285Z info service@v0.123.0/service.go:287 Everything is ready. Begin running and processing data.
bigip-78 2025-05-22T21:54:49.310Z error scraperhelper@v0.119.0/obs_metrics.go:61 Error scraping metrics {"error": "endpoint /mgmt/shared/authn/login returned code 400"}
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper.wrapObsMetrics.func1
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/obs_metrics.go:61
bigip-78 go.opentelemetry.io/collector/scraper.ScrapeMetricsFunc.ScrapeMetrics
bigip-78 go.opentelemetry.io/collector/scraper@v0.119.0/metrics.go:24
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper.scrapeMetrics
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:256
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper.NewMetricsController.func1
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:228
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper.(*controller[...]).startScraping.func1
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:171
bigip-78 2025-05-22T21:56:49.338Z error scraperhelper@v0.119.0/obs_metrics.go:61 Error scraping metrics {"error": "endpoint /mgmt/shared/authn/login returned code 400"}
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper.wrapObsMetrics.func1
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/obs_metrics.go:61
bigip-78 go.opentelemetry.io/collector/scraper.ScrapeMetricsFunc.ScrapeMetrics
bigip-78 go.opentelemetry.io/collector/scraper@v0.119.0/metrics.go:24
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper.scrapeMetrics
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:256
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper.NewMetricsController.func1
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:228
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper.(*controller[...]).startScraping.func1
bigip-78 go.opentelemetry.io/collector/scraper/scraperhelper@v0.119.0/controller.go:175

Dominant language: Python
Stars: 106
Forks: 43
PR merge metrics: No merged PRs in 30d

Contributor guide

Open the contributing guide

First steps

Read the whole issue, then the project's contributing guide.
Comment on the issue to say you are picking it up — it saves two people doing the same work.
Fork the repository and make your change on a branch.
Open a pull request that references the issue number.

Similar issues

[essnmx] Fix typo in NXLauetof application definition Open

essnmx good first issue

Difficulty 1/5 Under an hour Newbie friendliness 95/100

scipp/ess#760 · Opened Sep 23, 2026
[Feature] 奇物选择添加优先级 Open

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

syfoud/Simulated_Scepter#174 · Opened Sep 23, 2026
garak adapter grades a NaN detector score as PASS Open

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

Giskard-AI/giskard-oss#2840 · 1 comment · Opened Sep 23, 2026
A claim comment carrying the issue number is silently declined while the workflow reports success Open

area: repo bug perceived difficulty: 2

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

Nitjsefnie-Harness-Commons/daedalus#926 · Opened Sep 23, 2026
`IOCExtractor` always fails: `ioc_analyzer.build()` takes 1 argument but the agent dispatcher passes 2 Open

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

yeti-platform/yeti#1380 · Opened Sep 23, 2026

More Python issues