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

Problem:

bash-3.2$ ./emctl status agent
Oracle Enterprise Manager Cloud Control 12c Release 3
Copyright (c) 1996, 2013 Oracle Corporation. All rights reserved.
---------------------------------------------------------------
Agent Version : 12.1.0.3.0
OMS Version : 12.1.0.3.0
Protocol Version : 12.1.0.1.0
Agent Home : /u01/app/oem12cagent/agent_inst
Agent Binaries : /u01/app/oem12cagent/core/12.1.0.3.0
Agent Process ID : 6635
Parent Process ID : 1855
Agent URL : https://flex-bip-prod-dc-01:3872/emd/main/
Repository URL : https://osb-prod-dc-1:1159/empbs/upload
Started at : 2014-10-29 01:53:57
Started by user : oracle
Last Reload : (none)
Last successful upload : 2014-11-06 15:55:40
Last attempted upload : 2014-11-09 10:10:55
Total Megabytes of XML files uploaded so far : 20.22
Number of XML files pending upload : 4,925
Size of XML files pending upload(MB) : 2.9
Available disk space on upload filesystem : 75.90%
Collection Status : [COLLECTIONS_HALTED(
UPLOAD SYSTEM Threshold - unable to purge files in upload system)]
Backoff Expiration : 2014-11-09 10:13:36
Heartbeat Status : Ok
Last attempted heartbeat to OMS : 2014-11-09 10:11:25
Last successful heartbeat to OMS : 2014-11-09 10:11:25
Next scheduled heartbeat to OMS : 2014-11-09 10:12:25

---------------------------------------------------------------
Agent is Running and Ready
==========
bash-3.2$ ./emctl upload agent
Oracle Enterprise Manager Cloud Control 12c Release 3
Copyright (c) 1996, 2013 Oracle Corporation. All rights reserved.
---------------------------------------------------------------
EMD upload error:full upload has failed: Upload Recent Sending Statistics
________________________________

Avg send time=0.0 milliseconds
Backoff Event List
________________________________
Backoff event : channel=Response Severity expiration at 2014-11-09 12:33:08 BDT
Backoff event : channel=Response Severity expiration at 2014-11-09 12:33:07 BDT
Backoff event : channel=Response Severity expiration at 2014-11-09 12:33:09 BDT
Upload Failure List
_______________________________
Connection Event List
_____________________________
Upload timed out before completion.
Number of files to upload before the uploadNow call: 4975, total size (MB): 2.9422493
Remaining number of files to upload: 4975, total size (MB): 2.9422493 (TIMEOUT)
bash-3.2$

SOLUTION:

bash-3.2$ ./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.

bash-3.2$./emctl upload

Oracle Enterprise Manager Cloud Control 12c Release 2  

Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.

---------------------------------------------------------------

EMD upload completed successfully