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Posted to issues@spark.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2015/06/21 12:44:00 UTC
[jira] [Commented] (SPARK-8503) SizeEstimator returns negative
value for recursive data structures
[ https://issues.apache.org/jira/browse/SPARK-8503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14595014#comment-14595014 ]
Sean Owen commented on SPARK-8503:
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That looks near to Long.MIN_VALUE. It could be overflow, but I suspect something in the code returns Long.MIN_VALUE as a size to mean some kind of error condition and this is being added to a sum.
This doesn't really have any info that helps reproduce it though. If you can't describe your exact data structure, what does debugging reveal about when and where this happens?
> SizeEstimator returns negative value for recursive data structures
> ------------------------------------------------------------------
>
> Key: SPARK-8503
> URL: https://issues.apache.org/jira/browse/SPARK-8503
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.3.1
> Reporter: Ilya Rakitsin
>
> When estimating size of recursive data structures like graphs, with transient fields referencing one another, SizeEstimator may return negative value if the structure if big enough.
> This then affects the logic of other components, e.g. SizeTracker#takeSample() and may lead to incorrect behavior and exceptions like:
> java.lang.IllegalArgumentException: requirement failed: sizeInBytes was negative: -9223372036854691384
> at scala.Predef$.require(Predef.scala:233)
> at org.apache.spark.storage.BlockInfo.markReady(BlockInfo.scala:55)
> at org.apache.spark.storage.BlockManager.doPut(BlockManager.scala:810)
> at org.apache.spark.storage.BlockManager.putIterator(BlockManager.scala:637)
> at org.apache.spark.storage.BlockManager.putSingle(BlockManager.scala:991)
> at org.apache.spark.broadcast.TorrentBroadcast.writeBlocks(TorrentBroadcast.scala:98)
> at org.apache.spark.broadcast.TorrentBroadcast.<init>(TorrentBroadcast.scala:84)
> at org.apache.spark.broadcast.TorrentBroadcastFactory.newBroadcast(TorrentBroadcastFactory.scala:34)
> at org.apache.spark.broadcast.TorrentBroadcastFactory.newBroadcast(TorrentBroadcastFactory.scala:29)
> at org.apache.spark.broadcast.BroadcastManager.newBroadcast(BroadcastManager.scala:62)
> at org.apache.spark.SparkContext.broadcast(SparkContext.scala:1051)
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