Hexiaoqiao commented on code in PR #4407:
URL: https://github.com/apache/hadoop/pull/4407#discussion_r893514408
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/IncrementalBlockReportManager.java:
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@@ -251,12 +251,20 @@ synchronized void addRDBI(ReceivedDeletedBlockInfo rdbi,
DatanodeStorage storage) {
// Make sure another entry for the same block is first removed.
// There may only be one such entry.
+ ReceivedDeletedBlockInfo removedInfo = null;
for (PerStorageIBR perStorage : pendingIBRs.values()) {
- if (perStorage.remove(rdbi.getBlock()) != null) {
+ removedInfo = perStorage.remove(rdbi.getBlock());
+ if (removedInfo != null) {
break;
}
}
- getPerStorageIBR(storage).put(rdbi);
+ if (removedInfo != null &&
Review Comment:
@ZanderXu Thanks for the detailed information. It is an interesting case.
IMO, this improvement makes sense to me. Would you mind to add unit test to
cover this case?
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