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https://issues.apache.org/jira/browse/HADOOP-17032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17141806#comment-17141806
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Uma Maheswara Rao G commented on HADOOP-17032:
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Sorry [~abhishekd] for late, could not get into this yet.
Hi [~ayushtkn], could you please take a look at this PR ( since you have
already worked on this fix in other Jira) ? Thanks.
> Handle an internal dir in viewfs having multiple children mount points
> pointing to different filesystems
> --------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-17032
> URL: https://issues.apache.org/jira/browse/HADOOP-17032
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs, viewfs
> Reporter: Abhishek Das
> Assignee: Abhishek Das
> Priority: Major
>
> In case the viefs mount table is configured in a way where multiple child
> mount points are pointing to different file systems, the getContentSummary or
> getStatus don't return the expected result
> {code:java}
> mount link /a/b/ → hdfs://nn1/a/b
> mount link /a/d/ → file:///nn2/c/d{code}
> b has two files and d has 1 file. So getContentSummary on / should return 3
> files.
> It also fails for the following scenario:
> {code:java}
> mount link /internalDir -> /internalDir/linternalDir2
> mount link /internalDir -> /internalDir/linkToDir2 -> hdfs://nn1/dir2{code}
> Exception:
> {code:java}
> java.io.IOException: Internal implementation error: expected file name to be
> /java.io.IOException: Internal implementation error: expected file name to be
> /
> at
> org.apache.hadoop.fs.viewfs.InternalDirOfViewFs.checkPathIsSlash(InternalDirOfViewFs.java:88)
> at
> org.apache.hadoop.fs.viewfs.InternalDirOfViewFs.getFileStatus(InternalDirOfViewFs.java:154)
> at org.apache.hadoop.fs.FileSystem.getContentSummary(FileSystem.java:1684)
> at org.apache.hadoop.fs.FileSystem.getContentSummary(FileSystem.java:1695) at
> org.apache.hadoop.fs.viewfs.ViewFileSystem.getContentSummary(ViewFileSystem.java:918)
> at
> org.apache.hadoop.fs.viewfs.ViewFileSystemBaseTest.testGetContentSummary(ViewFileSystemBaseTest.java:1106){code}
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