topic Re: Error propagating schema changes on a multiple output processor in Talend Studio

Error propagating schema changes on a multiple output processor

Anonymous — Fri, 02 Jan 2026 14:45:42 GMT

I'm developing a Processor component with multiple outputs using the Talend Component Kit.

@ElementListener
public void map(
        final LasReaderInput input,
        @Output("Log") final OutputEmitter<LasLogCurve> logOutput,
        @Output("Parameter") final OutputEmitter<LasParameter> parameterOutput,
        @Output("Well") final OutputEmitter<LasWell> wellOutput) {

I found that if I "Edit Schema" in the component tab and click yes in the propagate change dialog that pops up; the edited schema overwrites the existing schema of the other output streams.

Re: Error propagating schema changes on a multiple output processor

ozhelezniak — Thu, 11 Feb 2021 09:40:58 GMT

Hi @Daniel Harter

This behavior sounds as expected to me. One schema per one component.

To change the schema for one output you can use tMap component for example.

Re: Error propagating schema changes on a multiple output processor

undx — Thu, 11 Feb 2021 17:12:36 GMT

Hi @Daniel Harter ,

Can you be more precise about which schema you modify?

You should have 4 `Edit schema` widgets:

Schema
Schema Log
Schema Parameter
Schema Well

Then, in the schema editor, you should have 2 pane (Input / Output)

So, which schema and which pane you edited ?

Also, can you try naming some of your outputs with std studio name like `@Ouput("Main") final ... @Ouput("REJECT") final... ` ?

And see if t the behavior is the same...