Splitting logs, we'll make an output file though the region no longer exists
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Key: HBASE-2471
URL: https://issues.apache.org/jira/browse/HBASE-2471
Project: Hadoop HBase
Issue Type: Bug
Reporter: stack
Fix For: 0.20.5, 0.21.0
The "human unit tester" (Kannan) last night wondered what happens splitting
logs and we come across an edit whose region has since been removed. Taking a
look, it looks like we'll create the output file and write the edits for the
no-longer-extant region anyways. This will leave litter in the filesystem --
region split files that will never be used nor removed. This issue is about
verifying that indeed this is whats happening (We do SequenceFile.createWriter
with the overwrite flag set to true which tracing seems to mean create all
intermediary directories -- to be verified) and if it indeed is happening,
fixing split so unless the region dir exists, don't write out edits.. just drop
them.
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