Jesse Yates created HBASE-8671:
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Summary: Per-region WAL breaks CP backwards compatibility for
non-enabled case
Key: HBASE-8671
URL: https://issues.apache.org/jira/browse/HBASE-8671
Project: HBase
Issue Type: Bug
Reporter: Jesse Yates
Assignee: Jesse Yates
Moving from a single WAL to the possibility of multiple WALs, the method
signature in RegionServerServices became:
{code}
/** @return the HLog for a particular region. Pass null for getting the
* default (common) WAL */
public HLog getWAL(HRegionInfo regionInfo) throws IOException;
{code}
However, CPs that previously needed access to the WAL would just call:
{code}
RegionServerServices.getWAL();
{code}
Which is equivalent to calling:
{code}
RegionServerServices.getWAL(null);
{code}
but which requires a code change, recompilation, and possibly an additional
compatibility layer for _different versions of 0.94_... not a great situation.
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