DBService Startup Failure During Cluster Installation Due to the Unavailable Port

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During the cluster installation or DBService restarting, DBService fails to start. An error message printed in the log indicates that port 20051 is occupied.Possible Causes:The default port, port 20051, of DBService is occupied by other processes.Stopping of the DBService process fails and therefore the port is not released.
Procedure:1.Use PuTTY to log in to the host where the DBService installation failure occurred as user root and run the ps -ef | grep "20051" command.
2.Run the kill command to forcibly stop the process that uses port 20051.
3.Run the following command in the /tmp and /var/run/FusionInsight-DBService directories. Delete all queried files:find . -name "*20051*"
4.Log in to FusionInsight Manager again, click Services, and restart DBService.

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