Reduced kafka log retention to 12 hours.

control/logging/config/server.properties

@@ -121,7 +121,7 @@ transaction.state.log.min.isr=1
 # from the end of the log.
 
 # The minimum age of a log file to be eligible for deletion due to age
-log.retention.hours=168
+log.retention.hours=12
 
 # A size-based retention policy for logs. Segments are pruned from the log unless the remaining
 # segments drop below log.retention.bytes. Functions independently of log.retention.hours.
@@ -154,4 +154,4 @@ zookeeper.connection.timeout.ms=6000
 # The default value for this is 3 seconds.
 # We override this to 0 here as it makes for a better out-of-the-box experience for development and testing.
 # However, in production environments the default value of 3 seconds is more suitable as this will help to avoid unnecessary, and potentially expensive, rebalances during application startup.
-group.initial.rebalance.delay.ms=0
+group.initial.rebalance.delay.ms=0