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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Created] (OAK-7852) Blocked backfround flush can cause sever data loss
Date Fri, 19 Oct 2018 09:27:00 GMT
Michael Dürig created OAK-7852:
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             Summary: Blocked backfround flush can cause sever data loss
                 Key: OAK-7852
                 URL: https://issues.apache.org/jira/browse/OAK-7852
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: segment-tar
            Reporter: Michael Dürig
            Assignee: Michael Dürig
             Fix For: 1.10


When the {{FileStore background task}} fails (e.g. because of a deadlock) and the {{FileStore}}
is subsequently shutdown in an unclean way ({{kill -9}}) then there is a risk of a sever data
loss. Although a journal could be reconstructed from the segments, there is a chance that
most if not all of the revisions written since the failure of the background tasks are inconsistent
with a {{SNFE}}. 

The expectation for such a case should be that a journal could be reconstructed from the segments
and that all but the last few revisions are consistent.



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