[GitHub] [hadoop] tomscut commented on a diff in pull request #4201: HDFS-16547. [SBN read] Namenode in safe mode should not be transfered to observer state

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

tomscut commented on code in PR #4201:
URL: https://github.com/apache/hadoop/pull/4201#discussion_r863251873


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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNode.java:
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@@ -1899,6 +1899,10 @@ synchronized void transitionToStandby() throws IOException {
   synchronized void transitionToObserver() throws IOException {
     String operationName = "transitionToObserver";
     namesystem.checkSuperuserPrivilege(operationName);
+    if (namesystem.isInSafeMode()) {

Review Comment:
   Thank you @xkrogen very much for the review and careful suggestions. 
   
   The intent here is really the same as `dfs.ha.nn.not-become-active-in-safemode`. It's just that the configuration name looks a bit conflicting.



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