Hi. I saws a log while lookinig at the logs of task.

2023-06-22T00:49:43,369 WARN [[index_kafka_hi_878c4a365a16742_nlcjpmdf]-appenderator-persist] org.apache.druid.segment.realtime.appenderator.StreamAppenderatorDriver - Slow segment handoff! Time taken for [2] segments is 19817040 ms

What could be the reason for this long taking handoff?