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docs: fix TypeScript unrecoverable error example #191

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yaythomas merged 1 commit into from
May 29, 2026
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docs: fix TypeScript unrecoverable error example #191

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16 changes: 11 additions & 5 deletions aws-lambda-durable-functions-power/steering/error-handling.md
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Original file line number Diff line number Diff line change
Expand Up @@ -234,23 +234,29 @@ def handler(event: dict, context: DurableContext) -> dict:

## Unrecoverable Errors

Mark errors as unrecoverable to stop execution immediately:
Configure non-retryable failures to stop execution immediately:

**TypeScript:**

The TypeScript SDK does not currently expose a public unrecoverable error type.
Use a no-retry strategy when a step should fail immediately.

```typescript
import { UnrecoverableInvocationError } from '@aws/durable-execution-sdk-js';
import { retryPresets } from '@aws/durable-execution-sdk-js';

export const handler = withDurableExecution(async (event, context: DurableContext) => {
const user = await context.step('fetch-user', async () => {
const user = await fetchUser(event.userId);

if (!user) {
// Stop execution immediately - no retry
throw new UnrecoverableInvocationError('User not found');
// This error fails the step immediately because retryPresets.noRetry
// disables retries for this step.
throw new Error('User not found');
}

return user;
}, {
retryStrategy: retryPresets.noRetry,
});

// Continue processing...
Expand Down Expand Up @@ -422,7 +428,7 @@ export const handler = withDurableExecution(async (event, context: DurableContex
2. **Classify errors correctly** - distinguish retryable from non-retryable
3. **Implement compensating transactions** for distributed workflows
4. **Make errors deterministic** - same input produces same error
5. **Use unrecoverable errors** to stop execution early when appropriate
5. **Disable retries for non-retryable errors** to stop execution early when appropriate
6. **Log errors with context** using `context.logger`
7. **Handle partial failures** gracefully in batch operations
8. **Implement circuit breakers** for external service calls
Expand Down