GitHub user ossDataEngineer added a comment to the discussion: How could I 
change a variable defined in JVM scope in JavaScript Action?

One solution: 

Parent Workflow - Set Variable var_retry_attempt=0 (Valid in current workflow)
Child Workflow (where the file download happens) on repeat and END_LOOP is set 
after successful attempt and retry count<3 is checked
Child pipeline - responsible to increment var_retry_attempt using Set variables 
transform (Valid in root workflow)



GitHub link: 
https://github.com/apache/hop/discussions/5181#discussioncomment-15138188

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