Chris Nauroth created HDFS-7118:
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Summary: Improve diagnostics on storage directory rename
operations by using NativeIO#renameTo in Storage#rename.
Key: HDFS-7118
URL: https://issues.apache.org/jira/browse/HDFS-7118
Project: Hadoop HDFS
Issue Type: Improvement
Components: journal-node, namenode
Reporter: Chris Nauroth
Assignee: Chris Nauroth
If a file rename fails, {{NativeIO#renameTo}} includes more information about
the root cause than a plain {{java.io.File#renameTo}}. The native code can
throw an exception with a detailed error message and the {{errno}} on *nix or
the value of {{GetLastError}} on Windows. This issue proposes to use
{{NativeIO#renameTo}} inside or in place of {{Storage#rename}} to help improve
diagnostics. The method falls back to {{java.io.File#renameTo}} if native code
is not loaded, so this change would not introduce a compatibility problem for
deployments running without native code.
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