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https://issues.apache.org/jira/browse/HADOOP-16247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16836742#comment-16836742
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Bharat Viswanadham commented on HADOOP-16247:
---------------------------------------------
+1. Could you add some explanation for the change, it will be easy when someone
is reading the code. Once this is done, I am +1 with the change.
Thank You [~kpalanisamy] for the fix. (I think now with this patch, it will fix
the file scheme with a relative path, and for rest of the URI's it uses the old
code, so it does not break anything.
> NPE in FsUrlConnection
> ----------------------
>
> Key: HADOOP-16247
> URL: https://issues.apache.org/jira/browse/HADOOP-16247
> Project: Hadoop Common
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 3.1.2
> Reporter: Karthik Palanisamy
> Assignee: Karthik Palanisamy
> Priority: Major
> Attachments: HADOOP-16247-001.patch, HADOOP-16247-002.patch,
> HADOOP-16247-003.patch, HADOOP-16247-004.patch, HADOOP-16247-005.patch,
> HADOOP-16247-006.patch, HADOOP-16247-007.patch
>
>
> FsUrlConnection doesn't handle relativePath correctly after the change
> [HADOOP-15217|https://issues.apache.org/jira/browse/HADOOP-15217]
> {code}
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.hadoop.fs.Path.isUriPathAbsolute(Path.java:385)
> at org.apache.hadoop.fs.Path.isAbsolute(Path.java:395)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.pathToFile(RawLocalFileSystem.java:87)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java:636)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.java:930)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:631)
> at
> org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:454)
> at
> org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.<init>(ChecksumFileSystem.java:146)
> at org.apache.hadoop.fs.ChecksumFileSystem.open(ChecksumFileSystem.java:347)
> at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:899)
> at org.apache.hadoop.fs.FsUrlConnection.connect(FsUrlConnection.java:62)
> at
> org.apache.hadoop.fs.FsUrlConnection.getInputStream(FsUrlConnection.java:71)
> at java.net.URL.openStream(URL.java:1045)
> at UrlProblem.testRelativePath(UrlProblem.java:33)
> at UrlProblem.main(UrlProblem.java:19)
> {code}
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