[GitHub] [hadoop] ayushtkn commented on a diff in pull request #5237: HDFS-16870 HDFS client ip should also be logged when NameNode is processing reportBadBlocks

[GitBox <gi...@apache.org>]

ayushtkn commented on code in PR #5237:
URL: https://github.com/apache/hadoop/pull/5237#discussion_r1051411641


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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java:
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@@ -5893,7 +5893,7 @@ void reportBadBlocks(LocatedBlock[] blocks) throws IOException {
         String[] storageIDs = blocks[i].getStorageIDs();
         for (int j = 0; j < nodes.length; j++) {
           NameNode.stateChangeLog.info("*DIR* reportBadBlocks for block: {} on"
-              + " datanode: {}", blk, nodes[j].getXferAddr());
+              + " datanode: {}" + " client: {}", blk, nodes[j].getXferAddr(), Server.getRemoteIp());

Review Comment:
   Instead of ``Server.getRemoteIp()``, do  a ``getClientMachine()`` instead, it handles calls via RBF.
   Fetching of this IP Address should be outside lock, doing this inside lock will hit performance. 
   You are logging this inside the loop, so better extract a variable outside.
   
   reportBadBlocks is there in both ClientProtocol as well as in DatanodeProtocol. Can check somewhat here for pointers
   https://github.com/apache/hadoop/blob/ca3526da9283500643479e784a779fb7898b6627/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L1533-L1534



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