Bugfix/npe help thread close

[ankitsmt211]

resolve #1157

Before

• when running archive help thread in DB routine, it would call a method that uses threadChannel inside a try-catch block
• It would catch Exception outside the method, even tho NPE is triggered inside it.

After

• refactor method to check of if threadChannel is NULL(if a channel is deleted when routine is triggered)
• Removes try-catch block
• conditional logic to handle if thread is NULL