Segment Protocols violation plan_id expected string but got integer: subscr

Not specified by the original author.

TL;DR

Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Start in the Segment workspace debugger, the Protocols tracking plan, and the warehouse sync log, work on one affected item, and prove the fix there before running the full set. Most cases of this failure clear once the value named in step 2 is corrected at its source rather than retried.

Segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse

Use this when

• You see this exact message or symptom in Segment: Segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse
• One run, record, build, or object is affected and you can name it
• A retry without changing anything reproduces the same text

Not for this skill when

• Segment fails with a different message and none of the signals here appear
• Nothing has failed yet and you are doing first time setup or general planning
• Every service from this vendor is down for all users, which is a vendor outage to wait out first

Steps

1. Reproduce the failure once in the Segment workspace debugger, the Protocols tracking plan, and the warehouse sync log and search the log or history for the exact text in the block above, recording the time, the workspace or project, and the one object it names. Verify: you have one failing run or object identified, not a similar older failure
2. Inspect the tracking plan event schema, the field types declared for the event, and the Protocols violation settings, and check the schema diff, the corrected field definition, and the validation run that now passes for the whole object. Verify: you can point to the specific value, field, or identity that does not match what this operation needs
3. Apply the fix at that source: diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Verify: the corrected value or setting is visible in Segment itself, not only in a local config file
4. Re-run the original operation on the single affected item first: send one corrected event through the debugger, confirm it passes Protocols, then re-enable the warehouse sync. Verify: that one item completes with no trace of the error text from the block above
5. Check the downstream result a user or the next job would see: the event arriving in the warehouse table with the declared type and no violation recorded. Verify: the downstream result agrees with the source for the test item, in value and in timestamp
6. Repeat for the full set, watch the first few items in the same log you started from, and write the root cause and the changed setting into the run notes. Verify: the full run finishes, the notes name the error and the changed setting, and no earlier item regressed

Variant phrasings

Segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse

The subject-first phrasing of the same failure. The fix is the same, start at step 1 and confirm the object the log names.

Segment version of this failure

The tool-first phrasing searchers use once they know which system raised it. It is the same underlying problem, not a separate bug.

Why does segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse keep happening after a retry

The repeat-occurrence phrasing. A retry without the step 2 and step 3 checks almost always reproduces it, because the cause sits in the object state, not in the attempt.

Compatibility: Segment Protocols and tracking plans, HTTP or library sources, warehouse destinations. The steps assume you can read the job or build log and change the named object in Segment.

Why it happens

In Segment, this failure usually means the definition and the real data disagree on a field name, type, or dependency, and the engine refuses to guess which one is right. The visible message is raised at the point where the bad state is consumed, which is rarely where it was created, so fixing the message text or retrying the last step changes nothing. Correcting the state at its source, then re-running one item and comparing the downstream result against the source, is what separates a real fix from a run that only looks successful.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_Ory3gZcYUXVUCVtLczjiVw

Resolved from the public thread: https://vectle.com/posts/pst_Ory3gZcYUXVUCVtLczjiVw

Thread query: Segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse

TL;DR: Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Start in the Segment workspace debugger, the Protocols tracking plan, and the warehouse sync log, work on one affected item, and prove the fix there before running the full set. Most cases of this failure clear once the value named in step 2 is corrected at its source rather than retried.

Not specified by the original author.

TL;DR

Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Start in the Segment workspace debugger, the Protocols tracking plan, and the warehouse sync log, work on one affected item, and prove the fix there before running the full set. Most cases of this failure clear once the value named in step 2 is corrected at its source rather than retried.

Segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse

Use this when

• You see this exact message or symptom in Segment: Segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse
• One run, record, build, or object is affected and you can name it
• A retry without changing anything reproduces the same text

Not for this skill when

• Segment fails with a different message and none of the signals here appear
• Nothing has failed yet and you are doing first time setup or general planning
• Every service from this vendor is down for all users, which is a vendor outage to wait out first

Steps

1. Reproduce the failure once in the Segment workspace debugger, the Protocols tracking plan, and the warehouse sync log and search the log or history for the exact text in the block above, recording the time, the workspace or project, and the one object it names. Verify: you have one failing run or object identified, not a similar older failure
2. Inspect the tracking plan event schema, the field types declared for the event, and the Protocols violation settings, and check the schema diff, the corrected field definition, and the validation run that now passes for the whole object. Verify: you can point to the specific value, field, or identity that does not match what this operation needs
3. Apply the fix at that source: diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Verify: the corrected value or setting is visible in Segment itself, not only in a local config file
4. Re-run the original operation on the single affected item first: send one corrected event through the debugger, confirm it passes Protocols, then re-enable the warehouse sync. Verify: that one item completes with no trace of the error text from the block above
5. Check the downstream result a user or the next job would see: the event arriving in the warehouse table with the declared type and no violation recorded. Verify: the downstream result agrees with the source for the test item, in value and in timestamp
6. Repeat for the full set, watch the first few items in the same log you started from, and write the root cause and the changed setting into the run notes. Verify: the full run finishes, the notes name the error and the changed setting, and no earlier item regressed

Variant phrasings

Segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse

The subject-first phrasing of the same failure. The fix is the same, start at step 1 and confirm the object the log names.

Segment version of this failure

The tool-first phrasing searchers use once they know which system raised it. It is the same underlying problem, not a separate bug.

Why does segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse keep happening after a retry

The repeat-occurrence phrasing. A retry without the step 2 and step 3 checks almost always reproduces it, because the cause sits in the object state, not in the attempt.

Compatibility: Segment Protocols and tracking plans, HTTP or library sources, warehouse destinations. The steps assume you can read the job or build log and change the named object in Segment.

Why it happens

In Segment, this failure usually means the definition and the real data disagree on a field name, type, or dependency, and the engine refuses to guess which one is right. The visible message is raised at the point where the bad state is consumed, which is rarely where it was created, so fixing the message text or retrying the last step changes nothing. Correcting the state at its source, then re-running one item and comparing the downstream result against the source, is what separates a real fix from a run that only looks successful.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_I63VsM00p2sw2WEVgh-eRQ

Resolved from the public thread: https://vectle.com/posts/pst_I63VsM00p2sw2WEVgh-eRQ

Thread query: Segment Protocols violation plan_id expected string but got integer: subscription downgrade event dropped before the warehouse

TL;DR: Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Start in the Segment workspace debugger, the Protocols tracking plan, and the warehouse sync log, work on one affected item, and prove the fix there before running the full set. Most cases of this failure clear once the value named in step 2 is corrected at its source rather than retried.

Not specified by the original author.

TL;DR

When Segment Protocols blocks an event, the event usually arrived fine and was then discarded for breaking the tracking plan, so debugging the app code wastes the day. Open the violation record for subscription_cancelled, read the exact rule it broke, then fix the side that is wrong, the event payload or the plan itself, and replay from the billing source for the blocked window. Never just switch blocking off without knowing which events it has been eating.

Segment tracking plan violation blocked the subscription_cancelled event: churn signal never reached the warehouse

Use this when

• Segment shows tracking plan violations naming subscription_cancelled
• The event is visible in the Segment debugger but absent in the warehouse
• Protocols is set to block or drop violating events for this source

Not for this skill when

• The debugger shows no event at all for a test cancellation, which is an instrumentation problem
• The warehouse destination itself is failing for all events, not only violating ones

Steps

1. Fire a controlled test cancellation and watch it in the Segment debugger for the production source, capturing the full payload exactly as sent including property names, types, and context fields. You need the real payload, not the intended schema from a spec document, because violations live in the difference between the two. Verify: the captured payload is saved with the test event and its timestamp
2. Open Protocols, select the tracking plan attached to that source, and open the violations view filtered to subscription_cancelled. Read the specific violations, such as an unplanned event, a required property missing, or a property sent as a string where the plan demands a number, and note the first violation date to size the data loss window. Verify: each violation is listed with its rule, and the first blocked date is known
3. Decide per violation which side is authoritative. If the plan is right, the emitting service must send the required property with the right type. If the product legitimately changed, for example cancellation now carries a reason code the plan never listed, update the plan through review instead of forcing the code back. Record the decision in the tracking plan change notes. Verify: every violation has an owner and a fix side, code or plan, written down
4. Apply the fix and send another test cancellation through the debugger, confirming Protocols now passes it and the event lands in the warehouse table with the account id, plan id, and cancellation timestamp intact. Check the warehouse row, not only the Segment UI, because the original symptom was a warehouse gap. Verify: the test event passes Protocols and its warehouse row is queryable
5. Measure and repair the blocked window. Count true cancellations in the billing system between the first violation date and the fix, load them into the churn pipeline with their original timestamps, and flag the Segment-sourced rows for that window as incomplete so nobody double counts the backfill. Verify: billing and warehouse cancellation counts agree for the window within an agreed tolerance
6. Tighten the process so this cannot recur silently. Add a daily violations alert routed to the data owner, require tracking plan review for lifecycle event changes, and keep blocking enabled only for sources where a named owner watches violations every day. Verify: a violations alert exists and a test violation reaches the owner

Why it happens

Protocols enforces the tracking plan at ingestion and, in blocking mode, discards non-conforming events before any destination sees them. The warehouse therefore shows a clean absence rather than an error, and the churn pipeline, which trusts the warehouse, reports fewer cancellations with total confidence. The enforcement is doing its job, the failure is that a load-bearing lifecycle event and the plan drifted apart with no alert on the violation stream.

Compatibility: Segment Protocols tracking plans, source debugger, and warehouse destinations such as Snowflake or BigQuery, in current Segment workspaces.

Variants and edge cases

Segment Protocols blocking event warehouse missing

['The warehouse-first phrasing. If the debugger shows the event and the warehouse does not, Protocols and destination filters are the two suspects, and the violations view decides between them in minutes.']

subscription_cancelled unplanned event violation

['The unplanned-event variant, common after a new billing service starts emitting lifecycle events before the plan is updated. Add the event to the plan deliberately with its full property schema.']

Segment tracking plan property type violation fix

['The type-mismatch variant. JSON numbers sent as strings are the classic case from form and webhook relays, so inspect any middleware that re-serialises the payload between the app and Segment.']

Edge cases to work through before you close the incident:

• Blocking mode, omitting mode, and warning mode behave very differently. Confirm the actual setting per source, because a plan can block on the server source while only warning on the web source.
• A destination can also have its own event filter allowing only listed events. If Protocols passes the test event but the warehouse still misses it, check destination filters next.
• Do not backfill by re-sending events through Segment with todays timestamps. Load history directly to the warehouse with original timestamps or every time-based churn model shifts.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_Q4SVm3uSwLgvVu6Hhu6fMQ

Resolved from the public thread: https://vectle.com/posts/pst_Q4SVm3uSwLgvVu6Hhu6fMQ

Thread query: Segment tracking plan violation blocked the subscription_cancelled event: churn signal never reached the warehouse

TL;DR: When Segment Protocols blocks an event, the event usually arrived fine and was then discarded for breaking the tracking plan, so debugging the app code wastes the day. Open the violation record for subscription_cancelled, read the exact rule it broke, then fix the side that is wrong, the event payload or the plan itself, and replay from the billing source for the blocked window. Never just switch blocking off without knowing which events it has been eating.