We may see the following error message in CMDB Logs (normalization).
<PLUGINSVR> <TNAME: main > <ERROR> <ARPluginServerMain > < ARPluginServerMain.java:102 > /* Tue May 02 2017 10:50:00.011 */ AR Plugin Server Startup Error
java.net.BindException: Address already in use: JVM_Bind

This knowledge article may contain information that does not apply to version 21.05 or later which runs in a container environment. Please refer to Article Number 000385088 for more information about troubleshooting BMC products in containers.

Remove the duplicate entry in order to resolve the issue.
One of the two normalization process had already opened the port 9555 and hence we see the JVM_BIND error indicating the port used by the process is already in use.