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- The default value of
-1forbroker.idis effectively unused in KRaft mode. Ifnode.idis set, the synonym mechanism overwritesbroker.idwith the value ofnode.id. If neither is set,node.idvalidation fails with aConfigExceptionbefore the default is ever used. - The documentation describes
node.idas required in KRaft mode, but it can currently actually be omitted if currently ifbroker.idis set, because the synonym mechanism automatically populatesnode.idfrombroker.id. After the removal in 5.0,node.idmust be explicitly set.
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