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https://issues.apache.org/jira/browse/HDFS-1934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bharath Mundlapudi updated HDFS-1934:
-------------------------------------
Attachment: HDFS-1934-5.patch
Reattaching a patch with minor correction for logging.
> Fix NullPointerException when certain File APIs return null
> -----------------------------------------------------------
>
> Key: HDFS-1934
> URL: https://issues.apache.org/jira/browse/HDFS-1934
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.23.0
> Reporter: Bharath Mundlapudi
> Assignee: Bharath Mundlapudi
> Fix For: 0.23.0
>
> Attachments: HDFS-1934-1.patch, HDFS-1934-2.patch, HDFS-1934-3.patch,
> HDFS-1934-4.patch, HDFS-1934-5.patch
>
>
> While testing Disk Fail Inplace, We encountered the NPE from this part of the
> code.
> File[] files = dir.listFiles();
> for (File f : files) {
> ...
> }
> This is kinda of an API issue. When a disk is bad (or name is not a
> directory), this API (listFiles, list) return null rather than throwing an
> exception. This 'for loop' throws a NPE exception. And same applies to
> dir.list() API.
> Fix all the places where null condition was not checked.
>
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