Github user uncleGen commented on the pull request:
https://github.com/apache/spark/pull/2076#issuecomment-52908740
@srowen yes! Not only in "StorageTab", "ExectutorTab" may also lose some
rdd-infos which have been overwritten by following rdd in a same task.
"StorageTab": when multiple stages run simultaneously, completed stage will
remove rdd-info which belong to other stages which are still running.
"ExectutorTab": In a dependency chain of rdds, task can only update the
latest rdd info. Like the following example:
val r1 = sc.paralize(..).cache()
val r2 = r1.map(...).cache()
val n = r2.count()
Currently, "ExecutorTab" show a wrong info about the "Memory Used", it only
shows the usage of r2, but not r1 and r2.
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