Marketing Cloud Engagement | What to do when notified that there is no response to a Webhook request from LINE

You may receive an error notification from LINE stating "No response to Webhook request." In most cases, this simply means that LINE did not receive a response within the specified timeframe, and receiving this email does not imply that an actual impact or message delivery failure has occurred. Generally, no immediate action is required, and you can simply monitor the situation; however, if the frequency of occurrence is high, a detailed investigation is necessary.

Root Cause and Impact

Due to LINE's specifications, if there is no response to a Webhook call within a certain period of time, an error notification is sent to the administrator. Depending on Marketing Cloud's processing load or network conditions, this specified timeframe may be slightly exceeded, but in most cases, the request is processed normally.

LINE's Related Documentation:

https://developers.line.biz/en/docs/partner-docs/error-notification/

Verification Steps for Administrators

When you receive an error, follow the steps below to check your settings and status.

1. Verify the Webhook URL Settings on the LINE Side

Before contacting support, verify that the correct Marketing Cloud URL is configured in the LINE Developers console.

• Log in to the LINE Developers console.

• Select the relevant channel and check [Messaging API settings] | [Webhook settings].

• Ensure that the Webhook URL is entered correctly and that [Use webhook] is enabled.

• Note: Consider enabling the Webhook redelivery feature. This can help mitigate the impact if a temporary issue occurs on the connected system (Marketing Cloud Engagement) side.

2. Check the Frequency of Error Notifications

Check how often you receive error emails and determine the appropriate action based on the following criteria:

• Low frequency (one-off or a few times): This is a temporary timeout. No special action is required, and you can safely ignore it.

• Significantly high or continuous frequency: There may be an actual issue or delay on the Marketing Cloud server side. You will need to contact support.

Contacting Support

If there are no issues with your configuration and the frequency of the error is significantly high, please Log a Case via Salesforce Help to request an investigation by Technical Support.