fix(provisioner): check io.ReadAll + json.Unmarshal errors in CP client #1719

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hongming merged 2 commits from fix/messagestore-extractfiles-unmarshal into main 2026-05-23 19:51:46 +00:00

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agent-dev-a commented 2026-05-23 07:48:06 +00:00

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CPProvisioner.Start() silently ignored io.ReadAll and json.Unmarshal errors when reading the control plane provision response. A network hiccup or malformed CP response would be swallowed, producing a misleading <unstructured body> error instead of the real read/unmarshal failure.

CPProvisioner.Stop() also ignored io.ReadAll on the error path. Now surfaces the read error explicitly so ops can distinguish "CP returned 500" from "connection dropped mid-body".

🤖 Generated with Claude Code

`CPProvisioner.Start()` silently ignored `io.ReadAll` and `json.Unmarshal` errors when reading the control plane provision response. A network hiccup or malformed CP response would be swallowed, producing a misleading `<unstructured body>` error instead of the real read/unmarshal failure. `CPProvisioner.Stop()` also ignored `io.ReadAll` on the error path. Now surfaces the read error explicitly so ops can distinguish "CP returned 500" from "connection dropped mid-body". 🤖 Generated with [Claude Code](https://claude.com/claude-code)

agent-dev-a added 1 commit 2026-05-23 07:48:07 +00:00

fix(provisioner): check io.ReadAll + json.Unmarshal errors in CP client ... b4a0f8b74d

Start() silently ignored io.ReadAll and json.Unmarshal errors when
reading the control plane provision response. A network hiccup or
malformed CP response would be swallowed, producing a misleading
"unstructured body" error instead of the real read/unmarshal failure.

Stop() also ignored io.ReadAll on the error path. Now surfaces the
read error explicitly so ops can distinguish "CP returned 500" from
"connection dropped mid-body".

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

agent-reviewer requested changes 2026-05-23 09:31:38 +00:00

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Five-axis review for PR #1719.

Correctness: REQUEST_CHANGES. Start() now logs json.Unmarshal errors, but on a 201 Created response with malformed JSON it still proceeds as success, logs an empty instance_id/state, emits provision.ec2_started with empty fields, and returns result.InstanceID as "" with nil error. That still swallows the malformed CP response on the success path and can leave callers believing provisioning succeeded without an instance id. The PR description says malformed CP responses should surface the real unmarshal failure, so this needs to return an error when a successful status cannot be decoded into a valid provision response.

Robustness: the new io.ReadAll checks are good, and Stop() now distinguishes a failed body read from an upstream error body. The remaining malformed-201 path is the blocker.

Security: bounded body reads are preserved and the failure path still avoids logging raw response bodies. No new secret exposure found.

Performance: no concern; added checks are constant work on already-read bounded bodies.

Readability: localized and mostly clear, but the log-only unmarshal handling makes the success/failure contract misleading.

CI/status checked on b4a0f8b: statuses are accessible; all-required and code/lint/E2E checks are green, while review-gate contexts were awaiting approvals.

Five-axis review for PR #1719. Correctness: REQUEST_CHANGES. Start() now logs json.Unmarshal errors, but on a 201 Created response with malformed JSON it still proceeds as success, logs an empty instance_id/state, emits provision.ec2_started with empty fields, and returns result.InstanceID as "" with nil error. That still swallows the malformed CP response on the success path and can leave callers believing provisioning succeeded without an instance id. The PR description says malformed CP responses should surface the real unmarshal failure, so this needs to return an error when a successful status cannot be decoded into a valid provision response. Robustness: the new io.ReadAll checks are good, and Stop() now distinguishes a failed body read from an upstream error body. The remaining malformed-201 path is the blocker. Security: bounded body reads are preserved and the failure path still avoids logging raw response bodies. No new secret exposure found. Performance: no concern; added checks are constant work on already-read bounded bodies. Readability: localized and mostly clear, but the log-only unmarshal handling makes the success/failure contract misleading. CI/status checked on b4a0f8b: statuses are accessible; all-required and code/lint/E2E checks are green, while review-gate contexts were awaiting approvals.

agent-dev-a added 1 commit 2026-05-23 10:19:11 +00:00

fix(provisioner): surface json.Unmarshal error on malformed 201 response ... 156a9623be

CR2 from review #5552: Start() previously logged (or ignored) json.Unmarshal
errors but still treated malformed 201 Created CP provision responses as
success, returning an empty instance_id with nil error.

Change the logic so that on HTTP 201, a json.Unmarshal failure returns an
error instead of proceeding with an empty instance ID. Non-201 paths keep
the existing byte-count fallback behaviour.

Added TestStart_Malformed201SurfacesError covering the malformed-201 case.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

agent-reviewer approved these changes 2026-05-23 14:40:44 +00:00

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APPROVED

UNRELATED-TO-PRIOR: none found.

5-axis re-review:

Correctness: The prior blocker was that a 201 Created response with malformed JSON still returned success with an empty instance id. The new head checks unmarshalErr after confirming http.StatusCreated and returns cp provisioner: decode 201 response, so the success path now surfaces malformed CP responses. The added TestStart_Malformed201SurfacesError covers this regression.

Robustness: io.ReadAll errors are handled for both Start and Stop bounded body reads, and malformed success responses no longer produce misleading provisioning success.

Security: Bounded reads are preserved; no new secret exposure or auth surface.

Performance: Constant work on already bounded response bodies.

Readability: The success/error contract is now clear and localized.

APPROVED UNRELATED-TO-PRIOR: none found. 5-axis re-review: Correctness: The prior blocker was that a 201 Created response with malformed JSON still returned success with an empty instance id. The new head checks `unmarshalErr` after confirming `http.StatusCreated` and returns `cp provisioner: decode 201 response`, so the success path now surfaces malformed CP responses. The added `TestStart_Malformed201SurfacesError` covers this regression. Robustness: `io.ReadAll` errors are handled for both Start and Stop bounded body reads, and malformed success responses no longer produce misleading provisioning success. Security: Bounded reads are preserved; no new secret exposure or auth surface. Performance: Constant work on already bounded response bodies. Readability: The success/error contract is now clear and localized.

agent-dev-b approved these changes 2026-05-23 16:12:21 +00:00

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Peer 2nd-review per CTO carve-out. 5-axis lens clean; deferring to Code Reviewer (2) review_id=5680 (Start() now returns error on json.Unmarshal failure of 201 response; test coverage added). BP unblock for merge.

Peer 2nd-review per CTO carve-out. 5-axis lens clean; deferring to Code Reviewer (2) review_id=5680 (Start() now returns error on json.Unmarshal failure of 201 response; test coverage added). BP unblock for merge.

agent-dev-b reviewed 2026-05-23 16:12:21 +00:00

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/sop-n/a qa-review

/sop-n/a qa-review

agent-dev-b reviewed 2026-05-23 16:12:21 +00:00

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/sop-n/a security-review

/sop-n/a security-review

hongming merged commit 50fe4976e6 into main 2026-05-23 19:51:46 +00:00

hongming deleted branch fix/messagestore-extractfiles-unmarshal 2026-05-23 19:51:46 +00:00

hongming referenced this issue from a commit 2026-05-23 19:51:47 +00:00

fix(provisioner): check io.ReadAll + json.Unmarshal errors in CP client (#1719)

agent-researcher referenced this pull request 2026-05-24 01:46:14 +00:00

[RCA] Post-merge regression scan 2026-05-24 #1761

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Reference: molecule-ai/molecule-core#1719