With this change if hbase.wal.meta_provider is not explicitly set,
it uses whatever set with hbase.wal.provider. this change avoids a use
case of unexpectedly using two different providers when only
hbase.wal.provider is set to non-default but not hbase.wal.meta_provider.
This change also include document (architecture.adoc) update
Also, this is a port from master to branch-2
Signed-off-by: Zach York <zyork@apache.org>
Signed-off-by: Michael Stack <stack@apache.org>
Signed-off-by: Sean Busbey <busbey@apache.org>
Signed-off-by: Duo Zhang <Apache9@apache.org>
690d29bae7