OEM Grid Control 12c Release 2 - Agent Errors on Upload

THE ERROR

"EMD upload error:full upload has failed: Upload Recent Sending Statistics"

> emctl upload
Oracle Enterprise Manager Cloud Control 12c Release 2  
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
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EMD upload error:full upload has failed: Upload Recent Sending Statistics
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Avg send time=0.0 milliseconds
Backoff Event List
________________________________
Upload Failure List
_______________________________
Connection Event List
_____________________________
Upload timed out before completion.
Number of files to upload before the uploadNow call: 301, total size (MB): 2.3485966
Remaining number of files to upload: 301, total size (MB): 2.3485966 (TIMEOUT)


THE SOLUTION

> emctl secure agent
Oracle Enterprise Manager Cloud Control 12c Release 2  
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
Agent successfully stopped...   Done.
Securing agent...   Started.
Enter Agent Registration Password : 
Agent successfully restarted...   Done.
EMD gensudoprops completed successfully
Securing agent...   Successful.

> emctl upload
Oracle Enterprise Manager Cloud Control 12c Release 2  
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
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EMD upload completed successfully