Unregistered <Component> that was already unregistered

General
1

Hello,

Today in our application logs, we have found the following warnings, we have no clue on what triggered these warnings. Any help in troubleshooting this issue would be appreciated.

App details:
Vaadin Version - 7.0
App Server: Jboss 7.2


[WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered CheckBox (3208) that was already
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered Link (3410) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered Image (3411) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered Image (3412) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered HorizontalLayout (3409) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered Link (3400) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered Image (3401) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered Image (3402) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered HorizontalLayout (3399) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered (3191) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered GridLayout (3175) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered VerticalLayout (3165) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered VerticalLayout (3192) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered TabSheet (3164) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered HorizontalLayout (3163) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered Button (3193) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered VerticalLayout (3150) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered CssLayout (3149) that was already unregistered.
 [WARNING]
 [com.vaadin.ui.ConnectorTracker]
 Unregistered MyUI (3148) that was already unregistered.

Thanks.

2

Hi,

Same here. This occurs since we are using @Push (and alot of other problems…) and we can reproduce it always with Vaadin 7.1.9:
Create a simple WebApp with one UI and add a label. Set

session-timeout= 20 seconds
heartbeatInterval = 4 seconds
closeIdleSessions = false

Open two browser tabs and go to the URL.
Now close one tab and wait for the session-timeout
→ a WARNINGs is logged for the label…

We have no problems without Push.
Looks like Push is still experimental.

And btw this is not the only problem we can easily reproduce, for example
Push also cause creating a second short live session (destroyed after 2-3 seconds) when a user visit
the URL for the first time (expected is that just one VaadinSession is created).
Something we also have never see without Push…

Greetz

3

Hi, the warnings should be harmless, but they are caused by
ticket #12985
 that has other unfortunate effects. It’s a regression introduced in 7.1.6.