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https://issues.apache.org/jira/browse/HADOOP-8054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13208237#comment-13208237
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Amareshwari Sriramadasu commented on HADOOP-8054:
-------------------------------------------------
bq. The change as Daryn stated was intentional, and was made to allow viewfs to
work properly in connection with FilterFileSystem.
I would like to better understand what has broken and how it was broken so we
can fix the correct thing.
What was broken - "The contained FileSystem is no more initialized after the
patch". The change makes all the sub classes of FilterFileSystem call
initialize for contained FileSystem - making it incompatible.
bq. why is it that after this patch is applied that no unit tests fail on our
side in common?
Because LocalFileSystem was changed to initialize the contained FileSystem in
HADOOP-8013. So, no tests were failing. Added the failing test in the attached
patch.
> NPE with RawLocalFileSystem
> ---------------------------
>
> Key: HADOOP-8054
> URL: https://issues.apache.org/jira/browse/HADOOP-8054
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 0.23.1
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Priority: Critical
> Attachments: HADOOP-8054.patch
>
>
> While running Hive tests, I'm seeing the following exception with 0.23.1,
> {noformat}
> ava.lang.NullPointerException
> at
> org.apache.hadoop.fs.FileSystem.getDefaultBlockSize(FileSystem.java:1901)
> at
> org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:447)
> at
> org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:351)
> at
> org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:351)
> at
> org.apache.hadoop.fs.ProxyFileSystem.getFileStatus(ProxyFileSystem.java:247)
> at
> org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:351)
> at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1165)
> at org.apache.hadoop.fs.FileUtil.checkDest(FileUtil.java:390)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:242)
> at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:232)
> {noformat}
> Did not see this with 0.23.0, though.
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