Jing Zhao created HDFS-7474:
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Summary: Avoid resolve path in FSPermissionChecker
Key: HDFS-7474
URL: https://issues.apache.org/jira/browse/HDFS-7474
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Reporter: Jing Zhao
Assignee: Jing Zhao
Currently for an typical namenode operation a path can be resolved multiple
times. Usually the FSPermissionChecker first takes the path string as input and
resolve the path before the real checking. After permission checking the path
is then resolved again (and again) for real operations in FSNamesystem and
FSDirectory. Ideally we should resolve the path only once, and use INodesInPath
internally afterwards. As a first step, we can start from avoiding path
resolving in FSPermissionChecker.
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