Github user mattyb149 commented on a diff in the pull request:
    --- Diff: 
    @@ -226,6 +242,8 @@ private ObjectWriter getObjectWriter(ObjectMapper 
mapper, String ppSetting) {
         public void onTrigger(final ProcessContext context, final 
ProcessSession session) throws ProcessException {
    +        FlowFile input = session.get();
    --- End diff --
    It's not checking for input == null here, that would be one of the 
requirements for the "flowfile-driven behavior" rather than the "timer-driven 
behavior". It might cause an NPE at line 266, and otherwise if null you may be 
treating it as flowfile-driven when really it is more like timer-driven. 
ExecuteSQL has a good example of how to handle this.


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