Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/17700#discussion_r112879836
--- Diff: core/src/main/scala/org/apache/spark/ui/exec/ExecutorsPage.scala
---
@@ -114,10 +114,16 @@ private[spark] object ExecutorsPage {
val rddBlocks = status.numBlocks
val memUsed = status.memUsed
val maxMem = status.maxMem
- val onHeapMemUsed = status.onHeapMemUsed
- val offHeapMemUsed = status.offHeapMemUsed
- val maxOnHeapMem = status.maxOnHeapMem
- val maxOffHeapMem = status.maxOffHeapMem
+ val memoryMetrics = for {
+ onHeapUsed <- status.onHeapMemUsed
+ offHeapUsed <- status.offHeapMemUsed
+ maxOnHeap <- status.maxOnHeapMem
+ maxOffHeap <- status.maxOffHeapMem
+ } yield {
+ new MemoryMetrics(onHeapUsed, offHeapUsed, maxOnHeap, maxOffHeap)
--- End diff --
Yes, this is to make sure `memoryMetrics` field will only be existed when
replaying new event logs, for Spark 2.1- event log, this field will not be
present.
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