Synchronization Fails With Exception

Problem: Some applications fail to synchronize, and report either an uncaught exception for waitForKeyGenerator when calling the subscribe method, or an OutOfMemoryException.

Explanation: This may happen if SAP Mobile Server does not send the key generator row in response to a login request from the client within 20 seconds of the client's subscribe request. This is typically because the mobile business object is handling a large amount of data. It can also happen if there is a connection problem with the enterprise information system (EIS) that slows response time.

Solution: Try one or more of these:

  • Increase the SAP Mobile Server Max Heap Size. Search for the Configuring System Performance Properties topic found in both System Administration and the SAP Control Center for SAP Mobile Platform online help.

  • Redesign the mobile business object (MBO) to handle less data in a transaction.
  • Develop custom logging to better trap error messages for more details.
Parent topic: Mobile Application Clients