Geospatial View node bug

[Artem]

I am participating in JustKnimeIt challenge and to learn how Geospatial nodes work I picked the solution from one of the participants:

JKISeason2-18 – rfeigel

However I am getting the error for Geospatial View (other nodes in this workflow work fine) node when I try to visualize my map, or edit the existing I am getting the message:

ERROR Geospatial View      3:6        Execute failed: Error while sending a command.

Here is the full error log:

2023-07-28 14:10:45,394 : ERROR : KNIME-Worker-2-Geospatial View 3:8 :  : Node : Geospatial View : 3:8 : Execute failed: Error while sending a command.
py4j.Py4JException: Error while sending a command.
	at py4j.CallbackClient.sendCommand(CallbackClient.java:397)
	at py4j.CallbackClient.sendCommand(CallbackClient.java:356)
	at py4j.reflection.PythonProxyHandler.invoke(PythonProxyHandler.java:106)
	at jdk.proxy10/jdk.proxy10.$Proxy46.execute(Unknown Source)
	at org.knime.python3.nodes.CloseablePythonNodeProxy.execute(CloseablePythonNodeProxy.java:314)
	at org.knime.python3.nodes.DelegatingNodeModel.lambda$4(DelegatingNodeModel.java:145)
	at org.knime.python3.nodes.DelegatingNodeModel.runWithProxy(DelegatingNodeModel.java:204)
	at org.knime.python3.nodes.DelegatingNodeModel.execute(DelegatingNodeModel.java:143)
	at org.knime.core.node.NodeModel.executeModel(NodeModel.java:549)
	at org.knime.core.node.Node.invokeFullyNodeModelExecute(Node.java:1267)
	at org.knime.core.node.Node.execute(Node.java:1041)
	at org.knime.core.node.workflow.NativeNodeContainer.performExecuteNode(NativeNodeContainer.java:595)
	at org.knime.core.node.exec.LocalNodeExecutionJob.mainExecute(LocalNodeExecutionJob.java:98)
	at org.knime.core.node.workflow.NodeExecutionJob.internalRun(NodeExecutionJob.java:201)
	at org.knime.core.node.workflow.NodeExecutionJob.run(NodeExecutionJob.java:117)
	at org.knime.core.util.ThreadUtils$RunnableWithContextImpl.runWithContext(ThreadUtils.java:367)
	at org.knime.core.util.ThreadUtils$RunnableWithContext.run(ThreadUtils.java:221)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at org.knime.core.util.ThreadPool$MyFuture.run(ThreadPool.java:123)
	at org.knime.core.util.ThreadPool$Worker.run(ThreadPool.java:246)
Caused by: py4j.Py4JNetworkException: Error while sending a command: c
p0
execute
to7
ro8
e

	at py4j.ClientServerConnection.sendCommand(ClientServerConnection.java:253)
	at py4j.CallbackClient.sendCommand(CallbackClient.java:384)
	... 20 more
Caused by: py4j.Py4JException: Received empty command
	at py4j.ClientServerConnection.sendCommand(ClientServerConnection.java:236)
	... 21 more

It seems that the problem is with the communication between Java and Python inside the package, I could not find any settings for Geospatial in Knime preferences. Am I missing anything - should I install special Python environment or packages?

Re-installation of the extension did not help. Some details: I use Knime 4.7.4 on Kubuntu 20.04.

[rfeigel]

@artem
I posted the workflow you’re looking at. I’m not an expert on the internal structure of the Geospatial Analysis extension., but as far as I know its “standalone”, i.e. doesn’t depend on a background Python environment. I’m running Windows 11 and KAP 4.7.5. Could Linux br the problem for you? Hopefully someone more knowledgable about this extension can weigh in.

`

[Artem]

UPDATE
I ran the same workflow on AP 4.7.2 on Windows 10 and I had no issues at all. So perhaps this might be an issue related to Linux.