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stack commented on HBASE-9307: ------------------------------ I'd say commit this [~jdcryans] though it does not have a test; it has a test region to try against. > HalfStoreFileReader needs to handle the faked key else compactions go into > infinite loops > ----------------------------------------------------------------------------------------- > > Key: HBASE-9307 > URL: https://issues.apache.org/jira/browse/HBASE-9307 > Project: HBase > Issue Type: Bug > Affects Versions: 0.95.2 > Reporter: Jean-Daniel Cryans > Assignee: Jean-Daniel Cryans > Priority: Critical > Fix For: 0.98.0, 0.96.0 > > Attachments: HBASE-9307.patch > > > I found this while trying out 0.95.2 > I couldn't shut my cluster down because one region was still compacting, but > it already had been doing that for an hour and it only had 80MBs of data. > Debugging I saw that it was a post-split compaction, specifically for the top > part of the HFiles, and that it was just spinning on the first entry in the > file. > Eventually I saw that the anonymous HFileScanner inside > HalfStoreFileReader.getScanner (that's so dirty) wasn't handling > HConstants.INDEX_KEY_MAGIC in seekTo() when calling this: > bq. this.delegate.seekTo(splitkey) > Instead it would treat this as if the split key wasn't in the file, but still > seek back to the beginning of the file *then read on from there*. > During the compaction it would see a KV that's not even part of the region, > and it just tries to find the correct block over and over again. > This came from HBASE-7845. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira