Jonathan Hsieh created HBASE-10401:
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Summary: [hbck] perform overlap group merges in parallel
Key: HBASE-10401
URL: https://issues.apache.org/jira/browse/HBASE-10401
Project: HBase
Issue Type: Bug
Components: hbck
Affects Versions: 0.96.1.1, 0.94.16, 0.92.2, 0.98.0, 0.99.0
Reporter: Jonathan Hsieh
Assignee: Jonathan Hsieh
In a recent support case, we encountered a corrupt hbase that had thousands of
"overlap groups" (regions that had overlapping key ranges). The current
implementation repairs these by serially taking a group, perorming a merge and
then moving on to the next group. Because assignments and hdfs nn operations
are involved each merge could take on the order of seconds. With thousands of
overlap groups, this could take hours to complete.
This patch makes it so that these independent merge groups are merged in
parallel. It uses the same thread pool for other fs info-gathering operations.
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