Hexiaoqiao commented on code in PR #6035:
URL: https://github.com/apache/hadoop/pull/6035#discussion_r1330184496
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java:
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@@ -666,7 +666,15 @@ private Consumer<List<DatanodeInfoWithStorage>>
createSecondaryNodeSorter() {
Consumer<List<DatanodeInfoWithStorage>> secondarySort = null;
if (readConsiderStorageType) {
Comparator<DatanodeInfoWithStorage> comp =
- Comparator.comparing(DatanodeInfoWithStorage::getStorageType);
+ Comparator.comparing(DatanodeInfoWithStorage::getStorageType, (s1,
s2) -> {
+ if (s1 == null) {
Review Comment:
Thanks @teamconfx for your report and fix. But I am confused why the
StorageType will be null here. IIUC, this attribute will be set when report
from DataNode once, and it's value will set to DISK by default. So any corner
case here?
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