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Date: Wed, 26 Sep 2012 10:02:08 +1100 (NCT)
From: "Arpit Gupta (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <1768104506.125684.1348614128770.JavaMail.jiratomcat@arcas>
Subject: [jira] [Created] (HADOOP-8846) Document backward incompatible
 changes introduced by HADOOP-8551
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Arpit Gupta created HADOOP-8846:
-----------------------------------

             Summary: Document backward incompatible changes introduced by HADOOP-8551
                 Key: HADOOP-8846
                 URL: https://issues.apache.org/jira/browse/HADOOP-8846
             Project: Hadoop Common
          Issue Type: Bug
    Affects Versions: 3.0.0, 2.0.2-alpha
            Reporter: Arpit Gupta


The following incompatible changes were noticed between branch-1 and branch-2 caused by HADOOP-8551

1. mkdir would create parent directories in branch-1 if they did not exist. In branch-2 users have to explicitly send mkdir -p

2. Create a multi level dir in branch 1 something like

mkdir /test/1

/test would get permissions 755 and /test/1 would get the permissions based on your umask settings

however if you run the command in branch-2
mkdir -p /test/1

both /test and /test/1 will get the permissions based on your umask. 

These are significant changes that we should document.

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