Forced splits only act on the first family in a table
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Key: HBASE-2399
URL: https://issues.apache.org/jira/browse/HBASE-2399
Project: Hadoop HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.20.3
Reporter: Jonathan Gray
Assignee: Jonathan Gray
Priority: Critical
Fix For: 0.20.4, 0.21.0
While working on a patch for HBASE-2375, I came across a few bugs in the
existing code related to splits.
If a user triggers a manual split, it flips a forceSplit boolean to true and
then triggers a compaction (this is very similar to my current implementation
for HBASE-2375). However, the forceSplit boolean is flipped back to false at
the beginning of Store.compact(). So the force split only acts on the first
family in the table. If that Store is not splittable for some reason (it is
empty or has only one row), then the entire region will not be split,
regardless of what is in other families.
Even if there is data in the first family, the midKey is determined based
solely on that family. If it has two rows and the next family has 1M rows, we
pick the split key based on the two rows.
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