How to fix the filesystem which has been exported to the world without interuppting or disconnecting client?

Issue

• Accidentally exported a file system to the .
• How to fix the export file and run exportfs -ra without interrupting or disconnecting the clients ?

# exportfs
/home/oracle/extracts
                example-prod.local.org
/home/oracle/extracts
                example-test1.local.org
/home/oracle/extracts
                example-test2.local.org
/home/oracle/extracts
                example-prod1.local.org
/home/oracle/extracts
                example-prod2.local.org
/home/oracle/extracts
                example.local.org
/home/oracle/extracts
                <world>