Installing a new plugin from the update center can be done without restarting Jenkins. But it seems that installing a new plugin from Plugin Manager » Advanced » Upload unconditionally forces a restart.
SCM/JIRA link daemon made changes -
|Field||Original Value||New Value|
|Resolution||Fixed [ 1 ]|
|Status||Open [ 1 ]||Resolved [ 5 ]|
R. Tyler Croy made changes -
|Workflow||JNJira [ 147476 ]||JNJira + In-Review [ 192431 ]|