ZanderXu created HDFS-16734:
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Summary: RBF: fix some bugs when handling getContentSummary RPC
Key: HDFS-16734
URL: https://issues.apache.org/jira/browse/HDFS-16734
Project: Hadoop HDFS
Issue Type: Bug
Reporter: ZanderXu
Assignee: ZanderXu
Suppose there are some mount points as bellows in RBF without default namespace.
||Source Path||NameSpace||Destination Path ||
|/a/b|ns0|/a/b|
|/a/b/c|ns0|/a/b/c|
|/a/b/c/d|ns1|/a/b/c/d|
Suppose there a file /a/b/c/file1 with 10MB data in ns0 and a file
/a/b/c/d/file2 with 20MB data in ns1.
There are bugs during handling some cases:
||Case Number||Case||Current Result||Expected Result||
|1|getContentSummary('/a')|Throw RouterResolveException |2files and 30MB data|
|2|getContentSummary('/a/b')|2files and 40MB data|3files and 40MB data|
Bugs for these cases:
Case1: If can't find any locations for the path, RBF should try to do it with
sub mount points.
Case2: RBF shouldn't repeatedly get content summary from one same namespace
with same ancestors path, such as from ns0 with /a/b and from ns0 with /a/b/c.
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