Enis Soztutar created HBASE-11094:
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Summary: Distributed log replay is incompatible for rolling
restarts
Key: HBASE-11094
URL: https://issues.apache.org/jira/browse/HBASE-11094
Project: HBase
Issue Type: Sub-task
Reporter: Enis Soztutar
Assignee: Jeffrey Zhong
Priority: Blocker
Fix For: 0.99.0
0.99.0 comes with dist log replay by default (HBASE-10888). However, reading
the code and discussing this with Jeffrey, we realized that the dist log replay
code is not compatible with rolling upgrades from 0.98.0 and 1.0.0.
The issue is that, the region server looks at it own configuration to decide
whether the region should be opened in replay mode or not. The open region RPC
does not contain that info. So if dist log replay is enabled on master, the
master will assign the region and schedule replay tasks. If the region is
opened in a RS that does not have this conf enabled, then it will happily open
the region in normal mode (not replay mode) causing possible (transient) data
loss.
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