SbloodyS commented on code in PR #16703:
URL: 
https://github.com/apache/dolphinscheduler/pull/16703#discussion_r1808248834


##########
docs/docs/en/guide/task/flink.md:
##########
@@ -37,7 +37,7 @@ Flink task type, used to execute Flink programs. For Flink 
nodes:
 | Parallelism             | Used to set the degree of parallelism for 
executing Flink tasks.                                                          
                                                                                
                                                              |
 | Yarn queue              | Used to set the yarn queue, use `default` queue by 
default.                                                                        
                                                                                
                                                     |
 | Main program parameters | Set the input parameters for the Flink program and 
support the substitution of custom parameter variables.                         
                                                                                
                                                     |
-| Optional parameters     | Set the flink command options, such as `-D`, `-C`, 
`-yt`.                                                                          
                                                                                
                                                     |
+| Optional parameters     | Set the flink command options, such as `-D`, `-C`, 
`-yt`, and support the substitution of custom parameter variables, such as 
`-Dyarn.application.name=${job_name}` custom parameter job _name will be 
replaced.                                                        |

Review Comment:
   Is this custom parameter `job_name` setting by users with hard code? If so, 
this is meaningless. We should add separate field options for users to use 
instead of using custom parameters, which are suitable for parameter passing 
and global parameters.



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