[jira] [Created] (HADOOP-15876) Use keySet().removeAll() to remove multiple keys from Map in AzureBlobFileSystemStore

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created HADOOP-15876:
-------------------------------

             Summary: Use keySet().removeAll() to remove multiple keys from Map in AzureBlobFileSystemStore
                 Key: HADOOP-15876
                 URL: https://issues.apache.org/jira/browse/HADOOP-15876
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Ted Yu


Looking at hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AzureBlobFileSystemStore.java , {{removeDefaultAcl}} in particular:
{code}
    for (Map.Entry<String, String> defaultAclEntry : defaultAclEntries.entrySet()) {
      aclEntries.remove(defaultAclEntry.getKey());
    }
{code}
The above operation can be written this way:
{code}
    aclEntries.keySet().removeAll(defaultAclEntries.keySet());
{code}



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