Sounds like you’re not really using Multisite OR you have some really sticky server side caching.
Are you updating the plugin at wp-admin/network/plugins.php ?
I follow here to create multisite http://codex.wordpress.org/Create_A_Network
Network->plugin update only effect to 1 site. How can I check the cache or debug?
Network->plugin update only effect to 1 site.
How are you determining this? What’s your reason to think that the plugin did not update on all sites?
How are you determining this? What’s your reason to think that the plugin did not update on all sites?
I manage 2 sites, I checked by update the plugin at the network. I compare 2 sites to detect that changes. How can I debug that?
I checked by update the plugin at the network
Checked WHAT though? The files are all loading from the same place, so what ‘change’ are you looking at and not seeing?
You cannot edit the plugins on the sub-sites, only the network, so we need a screenshot here to see what you’re seeing.
I attached the image. The first one is the sub-site, wordpress version 3.9.1. The second is network, wordpress version 3.9.2. I dont know why the sub-site does not update to latest version along with the network
Sub-Site
Network
Go to subsite.yourdomain.com/readme.html in your browser and see if THAT shows 3.9.2
If it does, then the issue is probably your server side cache.
I resolved this. Thank you!