topic Re: Talend Component Kit - Thread safe? - fFlowToIterate in Talend Studio

Talend Component Kit - Thread safe? - fFlowToIterate

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

Hello,

Before I spend additional days of trial and error a short question.

I created a small Input component which does only a System.out from the provided Input-Parameters. The component has two parameter Input fields “value1” and “value2”. It has a tFlowToIterate as Input and the FlowToIterate is filled by a normal CSV Input. Input-Parameter Field “Value1” contains as Value “((String)globalMap.get("row1.Firstname"))” and Input-Parameter Value2 containing “((String)globalMap.get("row1.Lastname"))”. Running the component is ok, but after changing the iteration (green arrow) to parallel will run in some Null-Pointers.

Question, is the whole “Talend Component Kit” threadsafe?

Regards

Martin

Re: Talend Component Kit - Thread safe? - fFlowToIterate

Anonymous — Mon, 24 Jun 2019 16:02:27 GMT

Pressing "Guess Schema" would also run into an error with activated parallelization. Maybee usefull?

Re: Talend Component Kit - Thread safe? - fFlowToIterate

Anonymous — Wed, 26 Jun 2019 09:10:18 GMT

Hello Martin,

The current integration uses a single instance of the component per step in the job.

This means, as you experienced, that it is not thread safe.

However this is a bug in the studio integration since in the Cloud (big data environment) we are thread safe.

I will follow up opening an issue in the Studio project to ensure it is fixed in a coming release.

Thanks a lot for reporting it.

Re: Talend Component Kit - Thread safe? - fFlowToIterate

Anonymous — Wed, 26 Jun 2019 13:13:43 GMT

You are welcome.

Regards
Martin