virajjasani commented on code in PR #5754:
URL: https://github.com/apache/hadoop/pull/5754#discussion_r1248329607
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/impl/prefetch/SingleFilePerBlockCache.java:
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@@ -103,13 +114,17 @@ private enum LockType {
READ,
WRITE
}
+ private Entry previous;
Review Comment:
LinkedHashMap has one implementation that can be overridden but it's not
much helpful for thread-safe implementation as the only alternative they
provide is for us to synchronize all read/write operations in LinkedHashMap
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