I am working with KNIME 5.2.5, and every so often, without any apparent trigger, the platform screen goes white, and only the banner at the top with the name remains visible. It does not allow saving, closing, and never recovers. I have to close KNIME from the Task Manager, which means I lose the work I’ve been doing. I cannot use KNIME 5.3 because, in the workflow I’m working on, I’m using some Vernalis nodes for which there is no extension in that version.
Is there any solution for this? In one week, I’ve lost several hours of work due to this issue.
I’m sorry to hear that. You have mentioned you haven’t noticed any apparent trigger but would you try to reproduce the issue and share some more details with us?
Also, if possible, sharing the knime.log file under your worksapce directory > .metadata > knime may help.
Below the error of the log:
2024-08-17 23:12:54,504 : WARN : main : : WrappedNodeDialog : Math Formula : 3:542 : failed to apply settings: Unable to parse m_expression
Syntax Error (assignment not enabled)
org.knime.core.node.InvalidSettingsException: Unable to parse m_expression
Syntax Error (assignment not enabled)
at org.knime.ext.jep.ExpressionParser.parse(ExpressionParser.java:179)
at org.knime.ext.jep.ExpressionParser.<init>(ExpressionParser.java:146)
at org.knime.ext.jep.JEPNodeDialogPane.saveSettingsTo(JEPNodeDialogPane.java:354)
at org.knime.core.node.NodeDialogPane.internalSaveSettingsTo(NodeDialogPane.java:539)
at org.knime.core.node.NodeDialogPane$4.run(NodeDialogPane.java:778)
at org.knime.core.node.util.ViewUtils$3.run(ViewUtils.java:353)
at org.knime.core.node.util.ViewUtils$2.run(ViewUtils.java:155)
at java.desktop/java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Unknown Source)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.desktop/java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.run(Unknown Source)
It happened exiting an open reporting component node.
log file:
2024-08-26 21:50:57,625 : WARN : KNIME-Worker-758-Component Input 3:2701:0:1967 : : Node : GroupBy : 3:2701:0:2005 : 1 invalid aggregation column(s) found.
2024-08-26 21:50:57,626 : WARN : KNIME-Worker-758-Component Input 3:2701:0:1967 : : Node : GroupBy : 3:2701:0:2005 : Group column ‘Source’ not in spec.
2024-08-26 21:50:57,626 : WARN : KNIME-Worker-758-Component Input 3:2701:0:1967 : : Node : Domain Calculator : 3:2701:0:2001 : Input table does not contain the following column(s) selected in the possible value panel: “Registered Voters”
2024-08-26 21:51:37,937 : WARN : main : : Node : Domain Calculator : 3:2701:0:2001 : Input table does not contain the following column(s) selected in the Min/Max value panel: “Registered Voters”
2024-08-26 21:52:31,779 : WARN : main : : Node : Domain Calculator : 3:2701:0:2001 : Input table does not contain the following column(s) selected in the Min/Max value panel: “Registered Voters”
On which KNIME Analytics Platform did you experience this issue?
Does it happen in the latest version (5.3.1 atm) too?
Does it happen the same as described in the first post with a blank (white) page?
Hi @armingrudd,
Yes, it is happening with the latest version Knime 5.3.1.
It is exactly the same symptoms, white screen, but the nodes still are executing.
The only way to recover the GUI is to restart Knime.
Of course it is a problema because you cannot save what was under processing.
Best regards.
Jean-David
It just happened again.
Log. file:
2024-09-01 17:43:21,450 : WARN : main : : WizardNodeView : : : Unable to retrieve value from view
2024-09-01 21:04:29,832 : ERROR : Provisioning Event Dispatcher : : PythonGatewayTracker : : : Found running Python processes. Aborting them to allow installation process. If this leads to failures in node execution, please restart those nodes once the installation has finished
It gives me a
502 error when i try to upload the screenshot picture to this post. I it the same as above, posts though.
I am running version 5.2.5.
Same blank screen.
The only way to recover the GUI is to restart Knime.
when I attemt to close window to restart it asked to save files. Clicking yes the window goes away and nothing happens. click no and it closes the window and allows KNIME to be restarted.
Regarding the log entries provided, you shared two and the second one was recorded at 21:04:29 which points to installing an extension and closing Python processes to install and restart AP.
Did the issue happen around the same time? Like during installation or right after installing and restarting AP?
If not, would you let us know if the potential cause in my previous reply is valid or not please?
