This error appear while trying to deploy agent for Enterprise manager 12c (em12c) and the cause for this error that port 3872 is already in use :
solution
[root@em12c Middleware]# netstat -anp | grep 3872
tcp 0 0 :::3872 :::* LISTEN 2391/java
[root@em12c Middleware]# kill -9 2391
[root@em12c Middleware]# netstat -anp | grep 3872
Deploy Again
Thank you
Osama Mustafa
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Published by Osama Mustafa
Osama considered as one of the leaders in Cloud technology, DevOps and database in the Middle-East. I have more than ten years of experience within the industry. moreover, certfied 4x AWS , 4x Azure and 6x OCI, have also obtained database certifications for multiple providers.
In addition to having experience with Oracle database and Oracle products, such as middle-ware, OID, OAM and OIM, I have gained substantial knowledge with different databases.
Currently, I am architecting and implementing Cloud and DevOps. On top of that, I'm providing solutions for companies that allow them to implement the solutions and to follow the best practices.
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Technology Geek 
thank you very much
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Your post is very helpful by using the information you provided i solved the problem of em12cr2 when the installation has reached 94 percent the agent configuration has failed so thanks you saved my day.
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Yes, this post is useful
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very helpful sir
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