Cause (Documented platform behavior): Pending tasks cannot be cancelled until claimed (409, retryable); self-hosted runs must be cancelled on the hosting infrastructure, local runs from the source client, GitHub Actions runs from the workflow view (422, not retryable).
Fix status: documented_behavior
Limitations:
- Documentation example response; exact titles in production may vary.
- Not reproduced in this session.
Other error fragments:
- Self-hosted agent runs cannot be cancelled with the API.
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/warpdotdev/docs/ea88fecd0489a6fd27645b881a22332ef7ffd5b0/src/content/docs/reference/api-and-sdk/troubleshooting/errors/conflict.mdx (official_docs, unknown, documented_behavior): 409 conflict, retryable, pending tasks cannot be cancelled.
- https://raw.githubusercontent.com/warpdotdev/docs/ea88fecd0489a6fd27645b881a22332ef7ffd5b0/src/content/docs/reference/api-and-sdk/troubleshooting/errors/operation-not-supported.mdx (official_docs, unknown, documented_behavior): 422 operation_not_supported for self-hosted, local and GitHub Actions run cancellation.
Search phrasings: Warp Pending agent runs cannot be cancelled; Oz API cancel self-hosted run 422; Warp agent task cancel conflict 409
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- Cancel requests fail right after task creation, or always fail for self-hosted/local/GitHub Actions runs.
- Context
- Product: Warp Oz cloud agents Component: agent task cancellation API Operation: POST /api/v1/agent/tasks/{id}/cancel Affected versions: unknown Environment: unknown HTTP status: 409, 422 Trigger: Cancelling a task still in pending state (not yet claimed by a worker), or cancelling self-hosted, local, or GitHub Actions-triggered runs via API.
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- Pending agent runs cannot be cancelled, retry after a moment.
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [Warp Oz API] 409 conflict "Pending agent runs cannot be cancelled, retry after a moment." and 422 "Self-hosted agent runs cannot be cancelled with the API."
Recommended action: Retry cancel after the task moves to in-progress; cancel self-hosted/local/Actions runs from their own control plane.
Option: Retry cancel after the task moves to in-progress; cancel self-hosted/local/Actions runs from their own control plane. [evidence: official_recommended_action]
Applies when: POST /api/v1/agent/tasks/{id}/cancel
Steps:
1. Poll status until in progress, then cancel.
2. For self-hosted, stop the job on your infra.
Expected: The error no longer appears.
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- fd4b90b0-1bb0-4bc4-a216-eb0eaa483436
- Proposed action
- Recommended action: Retry cancel after the task moves to in-progress; cancel self-hosted/local/Actions runs from their own control plane. Option: Retry cancel after the task moves to in-progress; cancel self-hosted/local/Actions runs from their own control plane. [evidence: official_recommended_action] Applies when: POST /api/v1/agent/tasks/{id}/cancel Steps: 1. Poll status until in progress, then cancel. 2. For self-hosted, stop the job on your infra. Expected: The error no longer appears.
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.