Set <logging> to DEBUG_DATA to get logged as much data as possible.
SSL invalid argument
If you see the following in MPP log:
[07:30:40] 8 [02691ba0] [HttpQuery] Query method POST [07:30:40] 8 [02691ba0] [HttpQuery] URI is generated: https://www.salesforce.com/services/Soap/c/16.0 [07:30:40] 8 [02691ba0] [HttpQuery] URI is parsed. Resolving host www.salesforce.com, port 443 [07:30:41] 8 [02691ba0] [HttpQuery] Using SSL encrypted connection [07:30:41] 4 [02691ba0] [CPipelineGroup] [GoThroughJobs] Standard exception caught: Invalid argument
then it is very likely that something wrong with your SSL configurations for HTTP engine. Check if <load_verify_file> points to an existing CA file.
You may use <log> tags to put data that you need to MPP log during result calculations.