diff --git a/hbase-common/src/main/resources/hbase-default.xml b/hbase-common/src/main/resources/hbase-default.xml
index d2ff712a2c..e88af91695 100644
--- a/hbase-common/src/main/resources/hbase-default.xml
+++ b/hbase-common/src/main/resources/hbase-default.xml
@@ -299,12 +299,20 @@ possible configurations would overwhelm and obscure the important.
hbase.regionserver.hlog.reader.impl
org.apache.hadoop.hbase.regionserver.wal.ProtobufLogReader
- The WAL file reader implementation.
+ The WAL file reader implementation.
+ This parameter should be used with hbase.regionserver.hlog.writer.impl as a pair.
+ ProtobufLogReader can only accept ProtobufLogWriter and AsyncProtobufLogWriter.
+ SecureProtobufLogReader can accept ProtobufLogWriter, SecureProtobufLogWriter,
+ AsyncProtobufLogWriter and SecureAsyncProtobufLogWriter.
hbase.regionserver.hlog.writer.impl
org.apache.hadoop.hbase.regionserver.wal.ProtobufLogWriter
- The WAL file writer implementation.
+ The WAL file writer implementation.
+ This parameter should be used with hbase.regionserver.hlog.reader.impl as a pair.
+ ProtobufLogWriter and AsyncProtobufLogWriter can be used with ProtobufLogReader and SecureProtobufLogReader.
+ SecureProtobufLogWriter and SecureAsyncProtobufLogWriter can only be used with SecureProtobufLogReader.
+
hbase.regionserver.global.memstore.size