Image Processing Extension working in AP but not on Server

KNIME Server
,
1

Dear KNIME team,

we’re seeing a strange issue after recently installing KNIME Server 4.11.2 and also reinstalling an executor (KNIME 4.2.2). While executing workflows on the server (both from KNIME AP and via the WebPortal) works fine in general, I get exceptions like this when trying to run workflows that contain any node from the KNIME Image Processing extension:

Errors loading workflow ‘Image Processing Extension’ due to missing extensions:

Extension: KNIME Image Processing
Nodes: Image Generator, ImgPlus to PNG Images

Together with our systems admin, we checked if we can start up KNIME AP on the executor instance directly (it’s running on a CentOS virtual machine), and the workflows are running fine when started from the GUI.

Also, the extensions are reported to be installed correctly, in particular:

org.knime.knip.feature.feature.group/1.8.3.202010230604
org.knime.knip.imagej.feature.feature.group/0.11.7.v202007071306
All installed features 
$ ./knime -application org.eclipse.equinox.p2.director -nosplash -consolelog -lir -d $PWD
CompilerOracle: exclude javax/swing/text/GlyphView.getBreakSpot
ch.fmi.knime.plugins.feature.feature.group/0.15.3.202010160457
com.knime.features.bigdata.knosp.feature.group/4.2.0.v202007081907
com.knime.features.enterprise.client.exampleserver.feature.group/4.2.0.v201912131004
com.knime.features.explorer.serverspace.feature.group/4.11.2.v202009251302
com.knime.features.workbench.repository.custom.feature.group/3.9.0.v201908130934
jp.co.infocom.cheminfo.marvin.feature.feature.group/4.0.0.v192100
org.knime.desktop.product/4.2.2.v202009251451
org.knime.features.activelearning.feature.group/4.2.0.v202006171506
org.knime.features.arima.feature.group/4.2.0.v202005222032
org.knime.features.audio.feature.group/4.2.0.v202006171508
org.knime.features.base.pmml.feature.group/4.2.0.v202003261551
org.knime.features.base.pmml.translation.feature.group/4.2.0.v202005261919
org.knime.features.base.pmml2.feature.group/4.2.0.v202003261551
org.knime.features.base.widedata.feature.group/4.2.0.v202003231244
org.knime.features.bigdata.fileformats.feature.group/4.2.0.v202007080953
org.knime.features.cloud.aws.dynamodb.feature.group/4.2.0.v202006261927
org.knime.features.cloud.aws.feature.group/4.2.0.v202006171540
org.knime.features.cloud.aws.mlservices.feature.group/4.2.0.v202006171540
org.knime.features.cloud.aws.redshift.driver.feature.group/4.2.0.v201912131001
org.knime.features.cloud.azure.feature.group/4.2.0.v202006171540
org.knime.features.core.streaming.feature.group/4.2.0.v202002191629
org.knime.features.database.connectors.sqlserver.driver.feature.group/6.2.2.v202005010447
org.knime.features.database.extensions.bigquery.feature.group/4.2.0.v202007101231
org.knime.features.database.extensions.sqlserver.driver.feature.group/4.2.0.v202005120748
org.knime.features.database.extensions.vertica.driver.feature.group/4.2.0.v202007020831
org.knime.features.database.feature.group/4.2.1.v202008251536
org.knime.features.datageneration.feature.group/4.2.0.v202002251753
org.knime.features.dbdrivers.feature.group/4.2.0.v202006221532
org.knime.features.distmatrix.feature.group/4.2.1.v202008251158
org.knime.features.dl.keras.feature.group/4.2.1.v202008251157
org.knime.features.dl.onnx.feature.group/4.2.0.v202006241028
org.knime.features.dl.tensorflow.feature.group/4.2.0.v202006241028
org.knime.features.dl.tensorflow2.feature.group/4.2.0.v202007071112
org.knime.features.ensembles.feature.group/4.2.0.v202004061016
org.knime.features.expressions.feature.group/4.2.2.v202009241054
org.knime.features.ext.chem.tools.feature.group/4.2.0.v202006171516
org.knime.features.ext.chromium.feature.group/83.0.4103.116
org.knime.features.ext.dl4j.feature.group/4.2.0.v202007031306
org.knime.features.ext.exttool.feature.group/4.2.0.v202005261930
org.knime.features.ext.itemset.feature.group/4.2.0.v202004301323
org.knime.features.ext.jep.feature.group/4.2.2.v202009241054
org.knime.features.ext.jfreechart.feature.group/4.2.0.v202005231356
org.knime.features.ext.jython.feature.group/4.2.0.v202006261130
org.knime.features.ext.lucene.feature.group/4.2.0.v202005081406
org.knime.features.ext.md.feature.group/4.2.0.v202004142045
org.knime.features.ext.osm.feature.group/4.2.0.v201912131003
org.knime.features.ext.parso.feature.group/4.2.0.v202004162034
org.knime.features.ext.perl.feature.group/4.2.0.v202003172102
org.knime.features.ext.poi.feature.group/4.2.1.v202008251158
org.knime.features.ext.svg.feature.group/4.2.2.v202009241055
org.knime.features.ext.tableau.bin.feature.group/4.2.0.v202006300719
org.knime.features.ext.tableau.feature.group/4.2.0.v202006300719
org.knime.features.ext.tableau.hyper.bin.feature.group/4.2.0.v202006300719
org.knime.features.ext.tableau.hyper.feature.group/4.2.0.v202006300719
org.knime.features.ext.tableau.hyperapi.feature.group/4.2.0.v202006260728
org.knime.features.ext.twitter.feature.group/4.2.0.v202003120757
org.knime.features.ext.webservice.client.feature.group/4.2.0.v202005240945
org.knime.features.ext.webservice.client.ppilot.feature.group/4.2.0.v202006230508
org.knime.features.ext.weka_3.7.feature.group/4.2.0.v202007031307
org.knime.features.javasnippet.feature.group/4.2.0.v202006150933
org.knime.features.jpmml.feature.group/4.2.0.v201912131003
org.knime.features.js.plotly.feature.group/4.2.0.v202006071334
org.knime.features.js.quickforms.feature.group/4.2.2.v202009280928
org.knime.features.js.views.feature.group/4.2.2.v202009241054
org.knime.features.js.views.labs.feature.group/4.2.2.v202009241054
org.knime.features.json.feature.group/4.2.1.v202008251158
org.knime.features.kafka.feature.group/4.2.0.v202006230509
org.knime.features.microsoft.r.feature.group/4.2.0.v202006230506
org.knime.features.mongodb.feature.group/4.2.0.v202006171547
org.knime.features.neighborgram.feature.group/4.2.0.v202002240952
org.knime.features.optimization.feature.group/4.2.0.v202005042102
org.knime.features.parquet.feature.group/4.2.0.v202007071950
org.knime.features.personalproductivity.feature.group/4.2.0.v202001210919
org.knime.features.python2.feature.group/4.2.2.v202009241055
org.knime.features.r.feature.group/4.2.0.v202007031307
org.knime.features.rest.feature.group/4.2.0.v202006301416
org.knime.features.sap.theobald.feature.group/4.2.0.v202007031202
org.knime.features.scm.git.feature.group/4.2.0.v202005260607
org.knime.features.semanticweb.feature.group/4.2.0.v201912131004
org.knime.features.stats.feature.group/4.2.0.v202008251159
org.knime.features.stats2.feature.group/4.2.1.v202008251159
org.knime.features.tensor.feature.group/4.2.0.v201912131004
org.knime.features.timeseries.feature.group/4.2.0.v202003271454
org.knime.features.virtual.feature.group/4.2.0.v202004271350
org.knime.features.weaksupervision.feature.group/4.2.0.v202006171506
org.knime.features.webanalytics.feature.group/4.2.0.v202005141321
org.knime.features.xgboost.feature.group/4.2.0.v202006171420
org.knime.features.xml.feature.group/4.2.1.v202008251159
org.knime.knip.feature.feature.group/1.8.3.202010230604
org.knime.knip.imagej.feature.feature.group/0.11.7.v202007071306
org.knime.knip.knimepython.feature.feature.group/1.0.9.v202007090959
Operation completed in 641 ms.

Would you have any idea why the KNIME Image Processing extension would be missing when running from KNIME Server? Is there anything else I can check?

(I also ran a workflow containing the Extract System Properties node to check that that the executor is running from the correct folder etc.)

Thanks in advance for any advice.

2

Hi @imagejan,

Sorry for asking the obvious: Does this workflow have other nodes from the KNIME Image Processing extension, as in, does it complain about all nodes in the workflow?

Is the executor started as a service? What does the invocation look like, i.e. what’s the output of ps aux for the knime binary?

Best regards,
Stefan

3

Sorry I wasn’t clear here. Yes, it complains about all image processing nodes in the workflow.
The test workflow I was using contained just these two nodes, actually.

As far as I can tell, no, i.e. we didn’t install the executor service for (potentially) multiple executors. Is that a requirement for extensions to work correctly? (Workflows containing other nodes executed without problems on the server.)

I will check back when I have direct access to the server machine, and will follow up here.

4

Definitely not. It’s just an additional layer step where something can go wrong (e.g. which user is executing the service) that I wanted to exclude from the investigation.

Another question: Did you, by chance, copy in the knime.ini from a previous installation?

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