It doesn’t take much Java development experience to learn firsthand what the NullPointerException is about. In fact, one person has highlighted dealing with this as the number one mistake Java ...

java.lang.NullPointerException: Cannot invoke "java.lang.Long.longValue()" at org.apache.pinot.plugin.minion.tasks.mergerollup.MergeRollupTaskGenerator.lambda ...

Hi @Kiro705 , I have only encountered such a situation once so far, and I will continue to observe it later. My code is basically the same as the example. At the beginning, I rewrote it with kotlin, ...