Adam Antal created HDFS-14028:
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Summary: HDFS OIV temporary dir deletes folder
Key: HDFS-14028
URL: https://issues.apache.org/jira/browse/HDFS-14028
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs
Reporter: Adam Antal
The Hadoop Offline Image Viewer tool has an undocumented 'feature' where it
will silently delete the directory passed in with the -t flag. This blew away
some important files when someone used a sensible, but ultimately poor choice
for this directory as the deletion isn't documented.
For example, if someone were, as root do: 'hdfs oiv -i
fsimage_00000000000307052343 -p Delimited -t / -o image', bad things would
happen. This behavior should be documented and probably have a dialog or
throwing exception.
There is a piece of code from PBImageTextWriter where a check can be added:
{code:java}
LevelDBMetadataMap(String baseDir) throws IOException {
File dbDir = new File(baseDir);
if (dbDir.exists()) {
FileUtils.deleteDirectory(dbDir);
}
...
{code}
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