如何修复Oracle Enerprise Manager错误-代理被阻止？

我已安装OEM 12c，重新启动oms后，代理出现以下错误：

Heartbeat Status : Agent is blocked
Blocked Reason : Plugin mismatch found between agent and repository. 
I have restarted the agent but sill no success. 

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如何修复此问题？

我建议您使用EM GUI重新同步您的代理

简而言之：

检查您的代理状态：

./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 : (unknown)
Protocol Version : 12.1.0.1.0
Agent Home : /em_agent12.3/agent_inst
Agent Binaries : /em_agent12.3/core/12.1.0.3.0
Agent Process ID : 64164
Parent Process ID : 64110
Agent URL : https://bih002:3872/emd/main/
Repository URL : https://dcg023:4900/empbs/upload
Started at : 2013-11-13 15:26:08
Started by user : em_user
Last Reload : (none)
Last successful upload : (none)
Last attempted upload : 2013-11-13 15:26:14
Total Megabytes of XML files uploaded so far : 0
Number of XML files pending upload : 72
Size of XML files pending upload(MB) : 0.11
Available disk space on upload filesystem : 91.16%
Collection Status : Collections enabled
Heartbeat Status : **Agent is blocked**

接下来使用GUI重新同步您的代理：

现在再次检查您的代理状态