在OEL5.8_x86_64上升级GridControl到10.2.0.5.0之后，重启虚拟机，发现OPMN的若干ias-component启动失败，随即进行手工启动。

1、opmnctl startproc ias-component=’LogLoader’

启动失败，看日志报错：

Cannot start LogLoaderDaemon on port 44,000. Received exception: oracle.core.ojdl.loader.ConfigurationException: Unable to restore state from file: diagnostics/persistence/logloader.ser..
oracle.core.ojdl.loader.ConfigurationException: Unable to restore state from file: diagnostics/persistence/logloader.ser.
        at oracle.core.ojdl.loader.LogLoader.getLogRecordLoader(LogLoader.java:403)
        at oracle.core.ojdl.loader.LogLoader.init(LogLoader.java:178)
        at oracle.core.ojdl.loader.LogLoader.init(LogLoader.java:122)
        at oracle.core.ojdl.loader.LogLoaderManagerImpl.init(LogLoaderManagerImpl.java:64)
        at oracle.core.ojdl.loader.LogLoaderDaemon.start(LogLoaderDaemon.java:124)
        at oracle.core.ojdl.loader.LogLoaderDaemon.main(LogLoaderDaemon.java:503)

等等若干异常抛出

分析原因因为 logloader.ser坏了，按照如下的步骤再试一次：

cd $OMS_AGENT/diagnostics/persistence

mv logloader.ser logloader.ser.bak

再回到$OMS_HOME/opmn/bin/

重新启动LogLoader成功

2、另外两个组件也随后手动启动成功。

GridControl升级后LogLoader启动失败