Table to JSON error

KNIME Server
1

Hi,
Is there a maximum number of rows which can be used as input table to a “Table to JSON” node?

I want to transform a table with 2 columns containing 26648 rows into a JSON (aggregation direction = Row-oriented (n input rows → 1 output cell), omit row key and missing values are omitted).
When I run the workflow on the server, the node is executed but the content of the cell for that node contains the message “loading error (Problem occured while serializing the cell: java.io.UTFDDataFormatException(null)” causing the next node to fail (PUT Request).

Any help is welcome.

Best,
Cl

2

Hi @Claire,
Can you confirm that when you reduce the number of rows, the node works correctly?
Kind regards,
Alexander

3

Hi,
Yes it did. But I’m wondering if it is not an issue with the server.
Regards,
Cl

4

Hi,
I cannot reproduce it on my machine, but I also do not believe it has anything to do with KNIME Server. The code runs on the server’s executor, which is very similar to KNIME Analytics Platform when it comes to node execution. Is the data you process confidential, or could you share it here for us to reproduce the issue with? Alternatively, I can also send you a private message so you can send me the workflow without sharing it publicly.
Kind regards,
Alexander

5

Thanks a lot for your help Alexander. I was able to execute it without problem few minutes ago - Thanks for your help.
Best,
Cl

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6

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