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https://issues.apache.org/jira/browse/HDFS-14852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16990394#comment-16990394
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Fei Hui commented on HDFS-14852:
--------------------------------
[~weichiu] Thanks for your comment!!
Try to reproduce this in test code
> Remove of LowRedundancyBlocks do NOT remove the block from all queues
> ---------------------------------------------------------------------
>
> Key: HDFS-14852
> URL: https://issues.apache.org/jira/browse/HDFS-14852
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ec
> Affects Versions: 3.2.0, 3.0.3, 3.1.2, 3.3.0
> Reporter: Fei Hui
> Assignee: Fei Hui
> Priority: Major
> Attachments: CorruptBlocksMismatch.png, HDFS-14852.001.patch,
> HDFS-14852.002.patch, HDFS-14852.003.patch, HDFS-14852.004.patch,
> HDFS-14852.005.patch, screenshot-1.png
>
>
> LowRedundancyBlocks.java
> {code:java}
> // Some comments here
> if(priLevel >= 0 && priLevel < LEVEL
> && priorityQueues.get(priLevel).remove(block)) {
> NameNode.blockStateChangeLog.debug(
> "BLOCK* NameSystem.LowRedundancyBlock.remove: Removing block {}"
> + " from priority queue {}",
> block, priLevel);
> decrementBlockStat(block, priLevel, oldExpectedReplicas);
> return true;
> } else {
> // Try to remove the block from all queues if the block was
> // not found in the queue for the given priority level.
> for (int i = 0; i < LEVEL; i++) {
> if (i != priLevel && priorityQueues.get(i).remove(block)) {
> NameNode.blockStateChangeLog.debug(
> "BLOCK* NameSystem.LowRedundancyBlock.remove: Removing block" +
> " {} from priority queue {}", block, i);
> decrementBlockStat(block, i, oldExpectedReplicas);
> return true;
> }
> }
> }
> return false;
> }
> {code}
> Source code is above, the comments as follow
> {quote}
> // Try to remove the block from all queues if the block was
> // not found in the queue for the given priority level.
> {quote}
> The function "remove" does NOT remove the block from all queues.
> Function add from LowRedundancyBlocks.java is used on some places and maybe
> one block in two or more queues.
> We found that corrupt blocks mismatch corrupt files on NN web UI. Maybe it is
> related to this.
> Upload initial patch
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