hfutatzhanghb opened a new pull request #3797:
URL: https://github.com/apache/hadoop/pull/3797
…rectory repeatedly
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### Description of PR
Router getContentSummary rpc compute sub-directory repeatedly when a
direactory and its ancestor directory are both mounted in the form of original
src path.
For example, suppose we have mount table entries below:
/A--ns1--/A
/A/B—ns1,ns2—/A/B
we put a file test.txt to directory /A/B in namepsace ns1, then execute
`hdfs dfs -count hdfs://router:8888/A`, the result is wrong, because we
compute /A/B/test.txt repeatedly
### How was this patch tested?
construct mount table entries in real cluster
### For code changes:
https://issues.apache.org/jira/browse/HDFS-16382
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