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Date: Thu, 3 Oct 2013 15:17:49 +0000 (UTC)
From: "Daryn Sharp (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12672157.1380813370506.7222.1380813469683@arcas>
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Subject: [jira] [Created] (HDFS-5293) Symlink resolution requires
 unnecessary RPCs
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Daryn Sharp created HDFS-5293:
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             Summary: Symlink resolution requires unnecessary RPCs
                 Key: HDFS-5293
                 URL: https://issues.apache.org/jira/browse/HDFS-5293
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
    Affects Versions: 2.0.0-alpha, 3.0.0
            Reporter: Daryn Sharp
            Priority: Critical


When the NN encounters a symlink, it throws an {{UnresolvedLinkException}}.  This exception contains only the path that is a symlink.  The client issues another RPC to obtain the link target, followed by another RPC with the link target + remainder of the original path.

{{UnresolvedLinkException}} should be returning both the link and the target to avoid a costly and unnecessary intermediate RPC to obtain the link target.


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