Offline Backfill requires backfillStartDate, which can be defaulted to end_date

[krisnaru]

25/03/11 18:59:44 INFO o.ap.spark.SparkContext: Successfully stopped SparkContext
Exception in thread "main" java.lang.AssertionError: assertion failed: GroupBy:xxx has null backfillStartDate. This needs to be set for offline backfilling.
at scala.Predef$.assert(Predef.scala:223)
at ai.chronon.spark.GroupBy$.computeBackfill(GroupBy.scala:681)
at ai.chronon.spark.Driver$GroupByBackfill$.run(Driver.scala:423)
at ai.chronon.spark.Driver$.main(Driver.scala:1024)
at ai.chronon.spark.Driver.main(Driver.scala)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52)
at org.apache.spark.deploy.SparkSubmit.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:1029)
at org.apache.spark.deploy.SparkSubmit.doRunMain$1(SparkSubmit.scala:194)
at org.apache.spark.deploy.SparkSubmit.submit(SparkSubmit.scala:217)
at org.apache.spark.deploy.SparkSubmit.doSubmit(SparkSubmit.scala:91)
at org.apache.spark.deploy.SparkSubmit$$anon$2.doSubmit(SparkSubmit.scala:1120)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:1129)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)

[pengyu-hou]

This error happens when you want to run a group by backfill only. But it seems that you did not specify the group by backfill start date. That is what it complains about.