FlowiseAI/Flowise · error · Error

Failed to index documents to Kendra: ${error}

Error message

Failed to index documents to Kendra: ${error}

What it means

Outer catch-all in the Kendra upsert path that wraps the inner 'Failed to index some documents' error (and any other error in batching/sending) into 'Failed to index documents to Kendra'. This double-wrapping obscures the original FailedDocuments detail.

Source

Thrown at packages/components/nodes/vectorstores/Kendra/Kendra.ts:176

                    for (let i = 0; i < kendraDocuments.length; i += batchSize) {
                        const batch = kendraDocuments.slice(i, i + batchSize)
                        const command = new BatchPutDocumentCommand({
                            IndexId: indexId,
                            Documents: batch
                        })

                        const response = await client.send(command)

                        if (response.FailedDocuments && response.FailedDocuments.length > 0) {
                            console.error('Failed documents:', response.FailedDocuments)
                            throw new Error(`Failed to index some documents: ${JSON.stringify(response.FailedDocuments)}`)
                        }
                    }
                }

                return { numAdded: finalDocs.length, addedDocs: finalDocs }
            } catch (error) {
                throw new Error(`Failed to index documents to Kendra: ${error}`)
            }
        },

        async delete(nodeData: INodeData, ids: string[], options: ICommonObject): Promise<void> {
            const indexId = nodeData.inputs?.indexId as string
            const region = nodeData.inputs?.region as string

            const credentialConfig = await getAWSCredentialConfig(nodeData, options, region)
            let clientConfig: KendraClientConfig = { region }
            if (credentialConfig.credentials) {
                clientConfig.credentials = credentialConfig.credentials
            }
            const client = new KendraClient(clientConfig)

            try {
                // Kendra has a limit of 10 documents per batch delete
                const batchSize = 10
                for (let i = 0; i < ids.length; i += batchSize) {

View on GitHub (pinned to abe4a8601a)

Solutions

1. Inspect the wrapped message to see the inner cause (often the FailedDocuments JSON).
2. Verify AWS credentials, region, and indexId are correct and the client has kendra:BatchPutDocument permission.
3. Distinguish transport errors from partial failures: rethrow the original error to keep type information.

Example fix

// before
} catch (error) {
    throw new Error(`Failed to index documents to Kendra: ${error}`)
}

// after
} catch (error) {
    console.error('Kendra index failed', error)
    throw error
}

const sts = await client.send(new GetCallerIdentityCommand({}))
// confirm permission
await client.send(new DescribeIndexCommand({ Id: indexId }))
// confirms kendra:DescribeIndex and that indexId exists in this region

function isKendraError(e: unknown): e is { name: string; $metadata: { httpStatusCode: number } } {
  return typeof e === 'object' && e !== null && typeof (e as any).name === 'string' && /^.+Error$/.test((e as any).name)
}

try {
  await indexToKendra(client, indexId, kendraDocuments)
} catch (e) {
  // unwrap the inner FailedDocuments detail if present
  const inner = String(e).includes('FailedDocuments') ? String(e) : `Kendra index failed: ${e}`
  throw new Error(inner, { cause: e })
}

When it happens

Trigger: Any throw inside the try — the inner FailedDocuments throw, a KendraClient.send transport error, or a credential error — surfaces here as a wrapped string.

Common situations: AWS credentials invalid/missing, region wrong, index ARN/Id wrong, throttling, or the inner partial-failure throw propagating.

Related errors

• Failed to index some documents: ${JSON.stringify(response.Fa
• Failed to delete documents from Kendra: ${error}
• Failed to decrypt credential data.
• Error in Agent node: ${error instanceof Error ? error.messag
• Error in Condition Agent node: ${error instanceof Error ? er

AI-assisted analysis of FlowiseAI/Flowise@abe4a8601a (2026-08-12). Data as JSON: /api/errors/85aa79e4d7f43b67. Report an issue: GitHub.