Oracle CRM On Demand: (503) Server Unavailable Error

A customer reported seeing "(503) Server Unavailable" errors sporadically throughout their crmex-log files.

Cause

Oracle CRM On Demand imposes a set of "web services on demand limiters" which can limit the total number of concurrent requests for data, maximum values for records and data requested.  If the total volume of data being requested or synced during a Riva sync cycle exceeds the permitted threshold value, Oracle On Demand web services will report the server is unavailable.

Resolution

If this issue if a low occurrence error, it can be safely ignored.  If the issue becomes pronounced, adjustments need to be made to reduce the number of requests and volume of data syncing.

This can be accomplished in several manners, including:

• Reduce the number of concurrent execution threads Riva is using.  This will reduce the number of requests and volume of data.  See Controlling Concurrent Riva Synchronization Threads for more details.
• If users are syncing large attachments, implement attachment size limits under advanced options in Riva sync policies.  See "Advanced Options - How to Configure a Sync Policy for Exchange" and "Disable Attachments on a Per-Module Basis"