zhangshuyan0 commented on code in PR #5450:
URL: https://github.com/apache/hadoop/pull/5450#discussion_r1124398378
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/LowRedundancyBlocks.java:
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@@ -369,7 +369,7 @@ synchronized boolean remove(BlockInfo block,
* @return true if the block was found and removed from one of the priority
* queues
*/
- boolean remove(BlockInfo block, int priLevel) {
+ synchronized boolean remove(BlockInfo block, int priLevel) {
Review Comment:
> This will just ensure only one thread getting into the remove method. But
what if there is one thread trying to remove, other trying to add or size().
add() and size() are already synchronized in the current code.
1.
https://github.com/apache/hadoop/blob/01027e52a9789eb5b386729f52b7bb9e52fa5352/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/LowRedundancyBlocks.java#L290
2.
https://github.com/apache/hadoop/blob/01027e52a9789eb5b386729f52b7bb9e52fa5352/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/LowRedundancyBlocks.java#L125
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