tFlowMeterCatcher Properties - 6.3

Talend Open Studio for Big Data Components Reference Guide

Talend Open Studio for Big Data
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Data Quality and Preparation
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Component family

Logs & Errors


Basic settings

Schema and Edit Schema

A schema is a row description, it defines the fields to be processed and passed on to the next component. In this particular case, the schema is read-only, as this component gathers standard log information including:



Moment: Processing time and date



Pid: Process ID



Father_pid: Process ID of the father Job if applicable. If not applicable, Pid is duplicated.



Root_pid: Process ID of the root Job if applicable. If not applicable, pid of current Job is duplicated.



System_pid: Process id generated by the system



Project: Project name, the Job belongs to.



Job: Name of the current Job



Job_repository_id: ID generated by the application.



Job_version: Version number of the current Job



Context: Name of the current context



Origin: Name of the component if any



Label: Label of the row connection preceding the tFlowMeter component in the Job, and that will be analyzed for volumetrics.



Count: Actual number of rows being processed



Reference: Number of rows passing the reference link.



Thresholds: Only used when the relative mode is selected in the tFlowMeter component.

Global Variables

ERROR_MESSAGE: the error message generated by the component when an error occurs. This is an After variable and it returns a string. This variable functions only if the Die on error check box is cleared, if the component has this check box.

A Flow variable functions during the execution of a component while an After variable functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl + Space to access the variable list and choose the variable to use from it.

For further information about variables, see Talend Studio User Guide.


This component is the start component of a secondary Job which triggers automatically at the end of the main Job.


If you are using a subscription-based version of the Studio, the activity of this component can be logged using the log4j feature. For more information on this feature, see Talend Studio User Guide.

For more information on the log4j logging levels, see the Apache documentation at


The use of this component cannot be separated from the use of the tFlowMeter. For more information, see tFlowMeter