huaxiangsun commented on code in PR #4170:
URL: https://github.com/apache/hadoop/pull/4170#discussion_r851552322
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java:
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@@ -1189,16 +1190,26 @@ public void registerDatanode(DatanodeRegistration
nodeReg)
nodes with its data cleared (or user can just remove the StorageID
value in "VERSION" file under the data directory of the datanode,
but this is might not work if VERSION file format has changed
- */
+ */
+ // Check if nodeS's host information is same as nodeReg's, if not,
+ // it needs to update host2DatanodeMap accordringly.
+ updateHost2DatanodeMap =
!nodeS.getIpAddr().equals(nodeReg.getAddress()) ||
Review Comment:
Updated and verified.
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