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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