Error Handlers and Incomplete Executions in Make

Every real Make scenario eventually encounters failure.

An API rate limits. A payload is malformed. A downstream service times out. A required field is missing.

The question is not whether that happens. The question is whether the scenario knows what kind of failure it is dealing with and what should happen next.

Why this lesson matters

Make scenarios often coordinate several systems in one flow.

That means a failure can create more than a red icon on the canvas. It can create:

• half-finished records
• duplicate reruns
• stuck operational work
• unclear ownership for recovery

Error handlers and incomplete executions exist to make that failure behavior more deliberate.

The short answer

In Make, error handlers define what the scenario should do when a module fails.

Incomplete executions let certain interrupted runs be stored so the team can inspect, resolve, and complete them later.

Together, they give a scenario more controlled recovery behavior than the default stop-on-error path.

Error handlers are about choosing the response

One of the most useful things about Make is that an error does not have to mean only one thing.

Depending on the situation, the right response may be to:

• retry later
• skip that bundle
• continue with a substitute value
• stop and preserve the state for manual resolution

That is what error handlers help express.

Not every error is the same kind of error

This matters a lot.

A transient connection or rate-limit issue is different from:

• invalid source data
• missing required business input
• a duplicate event
• a downstream rule rejection

The first category may deserve retry or delayed completion. The second often deserves validation, escalation, or a deliberate stop.

Incomplete executions are for interrupted work you may want to resume

Make can store incomplete executions when the scenario is configured to do so.

That is especially useful when the run should not simply disappear after failure.

Examples:

• a temporary service issue interrupted a valuable run
• a human needs to fix credentials or configuration first
• the scenario should be reviewed before continuing

This is different from pretending the error never happened.

A break-style recovery pattern is useful for transient failures

One of the practical uses of incomplete executions is when the scenario should stop the failing path and preserve the remaining work for later completion.

That can be helpful for:

• temporary API outages
• rate limiting
• unstable downstream services

It is much less helpful when the source data itself is broken, because retrying bad input usually just repeats the same problem.

Ignore and continue paths need caution

It is tempting to treat every noisy error as something the scenario should just continue past.

That can be risky.

If the failed step was important for:

• data integrity
• deduplication
• customer communication
• record creation order

then ignoring the error may create deeper operational damage than stopping the run.

Duplicates matter during recovery

Any scenario that can be retried or resumed should ask:

• what already succeeded before the failure
• which writes are safe to repeat
• what unique key proves the bundle already ran

Without that thinking, recovery may create duplicate side effects.

A good recovery path includes human ownership

Incomplete executions are useful only if someone knows:

• why the run failed
• what must be fixed
• when it is safe to resume

If the scenario stores failures but nobody owns them, the system has only delayed the operational mess.

Common mistakes

Mistake 1: Treating every error like a retry problem

Broken data and broken services are not the same thing.

Mistake 2: Ignoring important failures to keep the scenario green

That usually hides operational risk instead of removing it.

Mistake 3: Enabling recovery without duplicate protection

Retries and completions can repeat writes if the workflow is not idempotent enough.

Mistake 4: No owner for incomplete executions

Stored failures need real operational follow-through.

Mistake 5: Designing handlers without business context

The right response depends on what the module means in the process.

Final checklist

Before calling a Make scenario resilient, ask:

1. Which failures are transient and which are structural?
2. Which steps are safe to retry or resume?
3. When should the scenario preserve an incomplete execution?
4. Could recovery create duplicate downstream effects?
5. Who will review and resolve stored failures?
6. Does the handler behavior match the business importance of the failing step?

If those answers are clear, the scenario is much more likely to recover safely.

FAQ

What is an error handler in Make?

An error handler is a route attached to a module that tells Make what to do when that module fails instead of just following the default failure behavior.

What is an incomplete execution in Make?

An incomplete execution is a stored interrupted scenario run that can be reviewed and, when appropriate, completed or retried later.

Should every Make error use the same handler?

No. Temporary service issues, data problems, and business-rule failures usually need different responses.

What is the biggest mistake in Make error handling?

A common mistake is treating every error as either ignorable or retryable without thinking about data integrity, duplicates, or who should resolve the failure.