steveloughran commented on code in PR #7880:
URL: https://github.com/apache/hadoop/pull/7880#discussion_r2288107530


##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AzureBlobFileSystem.java:
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@@ -795,10 +801,10 @@ public boolean mkdirs(final Path f, final FsPermission 
permission) throws IOExce
 
   @Override
   public synchronized void close() throws IOException {
-    if (isClosed) {
+    if (isClosed()) {

Review Comment:
   @bhattmanish98 I don't see concurrency issues because close() is 
synchronized, and once closed it can't be closed again. Of course, once one 
thread has closed it, nobody else can use the instance. fix: don't do that. 



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