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https://issues.apache.org/jira/browse/HDFS-6582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Abhiraj Butala updated HDFS-6582:
---------------------------------
Attachment: HDFS-6582.patch
Attaching a patch which checks fis and returns NFS3ERR_ACCES if its null. Also
updated the corresponding unit test.
Though I am not sure if there are any other conditions (apart from user not
having permission) that can cause FSDataInputStream to be null. How did you hit
this issue [~tedyu]?
Let me know what you guys think. Thanks!
> Missing null check in RpcProgramNfs3#read(XDR, SecurityHandler)
> ---------------------------------------------------------------
>
> Key: HDFS-6582
> URL: https://issues.apache.org/jira/browse/HDFS-6582
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: nfs
> Reporter: Ted Yu
> Priority: Minor
> Attachments: HDFS-6582.patch
>
>
> Around line 691:
> {code}
> FSDataInputStream fis = clientCache.getDfsInputStream(userName,
> Nfs3Utils.getFileIdPath(handle));
> try {
> readCount = fis.read(offset, readbuffer, 0, count);
> {code}
> fis may be null, leading to NullPointerException
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