Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17064#discussion_r103349345
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala ---
@@ -168,15 +168,16 @@ class CacheManager extends Logging {
(fs, path.makeQualified(fs.getUri, fs.getWorkingDirectory))
}
- cachedData.foreach {
- case data if data.plan.find(lookupAndRefresh(_, fs,
qualifiedPath)).isDefined =>
- val dataIndex = cachedData.indexWhere(cd =>
data.plan.sameResult(cd.plan))
- if (dataIndex >= 0) {
- data.cachedRepresentation.cachedColumnBuffers.unpersist(blocking
= true)
- cachedData.remove(dataIndex)
- }
-
sparkSession.sharedState.cacheManager.cacheQuery(Dataset.ofRows(sparkSession,
data.plan))
- case _ => // Do Nothing
+ cachedData.filter {
--- End diff --
but we are still modifying it during iteration, after the `filter`. can you
be more specific about what the problem is?
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