LiteLLM / LiteLLM

OpenTelemetry integration crashes with unhashable type list when guardrail mode is list

Fix crash in LiteLLM OpenTelemetry guardrail integration when guardrail mode is configured as a Python list instead of single value Includes evidence for LiteLLM troubleshooting demand.

Source-backed Last updated May 22, 2026 1 source Needs local verification

Category: LiteLLM
Error signature: OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list'
Quick fix: Compare the failing environment with a known working setup, then change one configuration value at a time.
Updated: May 22, 2026
Verification status: Source-backed
Evidence: 1 public source URL

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for LiteLLM, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

What this error means

OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list' is a LiteLLM failure pattern reported for developers trying to fix crash in litellm opentelemetry guardrail integration when guardrail mode is configured as a python list instead of single value. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

GitHub issue #28486 on BerriAI/litellm opened May 22, 2026 by kenany. Passguardrails_mode as list causes Python TypeError crash ('unhashable type: list') in OpenTelemetry instrumentation path. bug + llm translation + proxy labels. Directly impacts observability setups for production LLM proxies. Clean, specific error signature with reproduction path. Not in covered errors list.

Common causes

GitHub issue #28486 on BerriAI/litellm opened May 22, 2026 by kenany. Passguardrails_mode as list causes Python TypeError crash ('unhashable type: list') in OpenTelemetry instrumentation path. bug + llm translation + proxy labels. Directly impacts observability setups for production LLM proxies. Clean, specific error signature with reproduction path. Not in covered errors list.

Quick fixes

Confirm the exact error signature matches OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list'.
Check the LiteLLM account, local tool state, and provider configuration involved in the failing workflow.
Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

Verify the command, editor, extension, or API client that produced the error.
Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

Capture the exact error message and the command, editor action, or request that triggered it.
Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
Review the source evidence below and compare it with your environment.
Apply one change at a time and rerun the smallest failing action.
Keep the working fix documented for the team or deployment environment.

How to prevent it

Keep provider/tool configuration documented.
Record non-secret diagnostics such as tool version, provider name, model name, and command path.
Add a lightweight check before CI or production workflows depend on the tool.

Diagnostic flow for this page

Match OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list' exactly before applying the quick fix.
Compare the failing environment with LiteLLM versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list' mean in LiteLLM?

OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list' indicates the workflow described by "OpenTelemetry integration crashes with unhashable type list when guardrail mode is list" failed in a LiteLLM context. Start by confirming the exact signature and the component that emitted it.

What should I check first for OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list'?

Check whether this cause matches your environment: GitHub issue #28486 on BerriAI/litellm opened May 22, 2026 by kenany. Passguardrails_mode as list causes Python TypeError crash ('unhashable type: list') in OpenTelemetry instrumentation path. bug + llm translation + proxy labels. Directly impacts observability setups for production LLM proxies. Clean, specific error signature with reproduction path. Not in covered errors list.

Is the OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list' guidance source-backed?

The "OpenTelemetry integration crashes with unhashable type list when guardrail mode is list" page is labeled source-backed. It has 1 public source URL from github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list'?

For "OpenTelemetry integration crashes with unhashable type list when guardrail mode is list", avoid applying "Compare the failing environment with a known working setup, then change one configuration value at a time." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging OpenTelemetry integration crashes with 'unhashable type: ''list'' when guardrail mode is a list'?

For "OpenTelemetry integration crashes with unhashable type list when guardrail mode is list", collect the failing LiteLLM command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.