plugin and custom field

unknown

table customfield showing customfieldtypekey , some of them from 

com.atlassian.jira.plugin.xxxxxxxxxxxxxx

out of curiosity -

1. is there a way to know customfield generated by certain plugin ? 
2. should I see the plugin related to customfield somewhere in system ? 
3. any system must-have plugin which related to customfield ? 

 

 

Tzu Hau Chai_vgozzh

The class name in the customfieldtypekey should provide enough information as to where it is from. If it does not start with com.atlassian.xxx it is probably not JIRA's bundled system plugin but from a third party plugin instead, you should be able to find out what plugin it is by simply doing a quick search with the class name.