Hi,

I noticed the following WARN message frequently appearing in the logs:

WARN  Slot [main] - SLOT m:p Starting in state EMPTY - assignment null

Examining the source code here:
https://github.com/apache/storm/blob/master/storm-server/src/main/java/org/apache/storm/daemon/supervisor/Slot.java#L145

It appears that the message is always logged as a WARN. Also, I understand when 
assignment is null, state is EMPTY.

I'd like to understand what this means and if there are any adverse effects.

Thank you
Ramin

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