Todd Lipcon created HDFS-3652:
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Summary: 1.x: FSEditLog failure removes the wrong edit stream when
storage dirs have same name
Key: HDFS-3652
URL: https://issues.apache.org/jira/browse/HDFS-3652
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 1.0.3, 1.1.0, 1.2.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Blocker
In {{FSEditLog.removeEditsForStorageDir}}, we iterate over the edits streams
trying to find the stream corresponding to a given dir. To check equality, we
currently use the following condition:
{code}
File parentDir = getStorageDirForStream(idx);
if (parentDir.getName().equals(sd.getRoot().getName())) {
{code}
... which is horribly incorrect. If two or more storage dirs happen to have the
same terminal path component (eg /data/1/nn and /data/2/nn) then it will pick
the wrong stream(s) to remove.
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