We observed that some threads can reach deadlock-ish state after they have Invoked into a control's UI thread. When it happens they are all in a waiting for join or in sleep state for very long time, although there should not be any deadlock situations.
It seems this has something to do with multiple parent controls and with which control we invoked on. This should not make a difference, because we have got one UI thread (for MainWindow) they should wait for, but we have seen it does.
The solution that fixed this issue was to invoke on the MainWindow instead of various controls (see a4fe507adf ).
This changeset is changing all our Invokes to invoke into MainWindow
instead of a control itself. (MainWindow's UI thread is the only UI thread
all Control is using in XenCenter)
This changeset should be in place until we have found the root cause or the exact reason for the above.
In some cases calling Control.Invoke() from a background thread causes that thread to go in a "sleep, wait, or join" mode, while waiting for Invoke to happen, although the UI thread is running normally.
If the Control is the MainWindow, it works as expected, but we've seen it happening while connecting or disconnecting from a large pool, on calling Invoke on controls like NavigationView, AlertSummaryPage, HistoryPage, etc.
To fix this, we call the Invoke on the MainWindow in all the places where we've seen the issue.
With this changes, the previous fix for CA-148245 (call RequestRefreshTreeView on CacheClearing event) is not needed anymore, so I removed that call.
Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>
-I defined save and restore selection functionality in SelectionBroadcaster and implemented them in SelectionManager. The NavigationPanel now uses these to: 1) save the current Selection (context) when the user switches to the Notification view, 2) to restore previous selection when switching away from the Notifications view.
When the navigation panel is resized, we need to preserve the height of the bottom panel, by recalculating the splitter distance.
Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>
events. Fixed display issue when moving between the notifications and the other views.
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
Preserve last selected node when switching between views. Added labelling to the
unit tests run post-build. Minor tidy.
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
icon. Moved class OrganizationalView from XenModel back to XenAdmin as it is more
relevant to the latter. Updated relevant tests. Some code tidy.
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
Fixed some memory leaks in the wizard and dialog tests. Updated broken Searcher tests.
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
