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https://issues.apache.org/jira/browse/HDFS-6885?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yi Liu updated HDFS-6885:
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Attachment: HDFS-6885.001.patch
> Fix wrong use of BytesWritable in FSEditLogOp#RenameOp
> ------------------------------------------------------
>
> Key: HDFS-6885
> URL: https://issues.apache.org/jira/browse/HDFS-6885
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Yi Liu
> Assignee: Yi Liu
> Priority: Minor
> Attachments: HDFS-6885.001.patch
>
>
> After readField using BytesWritable, the data length should be
> {{writable.getLength()}}, instead of {{writable.getBytes().length}} which is
> the buffer length.
> This will cause returned {{Rename[]}} is longer than expected and may include
> some incorrect values (Currently they are Rename#NONE, and have not caused
> problem but code logic is incorrect).
> {code}
> BytesWritable writable = new BytesWritable();
> writable.readFields(in);
> byte[] bytes = writable.getBytes();
> Rename[] options = new Rename[bytes.length];
> for (int i = 0; i < bytes.length; i++) {
> options[i] = Rename.valueOf(bytes[i]);
> }
> {code}
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