ComposioHQ/composio · error · Error

Failed to bind chunked events: ${errorMessage}

Error message

Failed to bind chunked events: ${errorMessage}

What it means

Catch-all wrapper around failures while setting up the chunked-event binding for a trigger channel (bindWithChunking). The underlying error message is appended. It typically wraps error 402 or a pusher-js bind failure.

Source

Thrown at ts/packages/core/src/utils/pusher.ts:216

                parseError instanceof Error ? parseError.message : String(parseError);
              logger.error('Failed to parse chunked data:', errorMessage);
            } finally {
              delete events[typedData.id];
            }
          }
        } catch (error: unknown) {
          const errorMessage = error instanceof Error ? error.message : String(error);
          logger.error('Error processing chunked trigger data:', errorMessage);
          // Clean up the event data to prevent memory leaks
          if (data && typeof data === 'object' && 'id' in data) {
            delete events[data.id as string];
          }
        }
      });
    } catch (error: unknown) {
      const errorMessage = error instanceof Error ? error.message : String(error);
      logger.error('Failed to bind chunked events:', error);
      throw new Error(`Failed to bind chunked events: ${errorMessage}`);
    }
  }

  /**
   * Subscribes to a trigger channel for a client and handles chunked data.
   * @param {string} clientId - The unique identifier for the client subscribing to the events.
   * @param {(data: TriggerData) => void} fn - The callback function to execute when trigger data is received.
   *
   * @example
   * ```ts
   * composio.trigger.subscribe((data) => {
   *   console.log(data);
   * });
   * ```
   */
  static triggerSubscribe(clientId: string, fn: (data: TriggerData) => void): void {
    try {
      if (!PusherUtils.pusherClient) {

View on GitHub (pinned to 64b1b85502)

Solutions

1. Read the appended underlying message to identify whether it's the chunk-format error or a bind failure
2. Re-initialize the Pusher client / re-subscribe (the client is cached statically; a fresh process may fix stale state)
3. Upgrade @composio/core to align with the backend chunking protocol

try {
  PusherUtils.triggerSubscribe(clientId, fn);
} catch (e) {
  logger.error('Trigger bind failed:', e);
  await backoffRetry(() => PusherUtils.triggerSubscribe(clientId, fn), 3);
}

When it happens

Trigger: Subscribing to triggers via PusherUtils.triggerSubscribe when channel.bind throws, or when chunk validation (error 402) raises inside the event handler during setup.

Common situations: Same scenarios as invalid chunked data (version skew); pusher-js channel in a failed state after a disconnect/reconnect cycle.

Related errors

• Invalid chunked trigger data format
• Pusher connection error: ${err.message}
• Trigger subscription error
• Failed to subscribe to triggers: ${errorMessage}
• Failed to initialize Pusher client: ${errorMessage}

AI-assisted analysis of ComposioHQ/composio@64b1b85502 (2026-08-28). Data as JSON: /api/errors/1d11528edccf9fc2. Report an issue: GitHub.