Major Description
We still see instances of the server returning 0 numChunks in mergedMetaResponse which causes the executor to fail with ArithmeticException.
java.lang.ArithmeticException: / by zero at org.apache.spark.storage.PushBasedFetchHelper.createChunkBlockInfosFromMetaResponse(PushBasedFetchHelper.scala:128) at org.apache.spark.storage.ShuffleBlockFetcherIterator.next(ShuffleBlockFetcherIterator.scala:1047) at org.apache.spark.storage.ShuffleBlockFetcherIterator.next(ShuffleBlockFetcherIterator.scala:90) at org.apache.spark.util.CompletionIterator.next(CompletionIterator.scala:29) at scala.collection.Iterator$$anon$11.nextCur(Iterator.scala:484) at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:490) at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:458) at org.apache.spark.util.CompletionIterator.hasNext(CompletionIterator.scala:31) at org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:37) at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:458)
Here the executor doesn't fallback to fetch un-merged blocks and this also doesn't result in a FetchFailure. So, the application fails.