The Developer Tool performs validations each time you run a streaming mapping.
The Developer tool generates an error in the following scenarios:
The state store is not configured when you specify the source configuration properties for the mapping.
Either the Maximum Rows Read or the Maximum Runtime Interval property is not configured when you specify the source configuration properties for the mapping.
The Maximum Runtime Interval does not have the correct time format.
The Batch Interval does not have the correct time format.
If the default value of the Batch Interval and Maximum Runtime Interval properties are not specified.