HBASE-20130 Use defaults (16020 & 16030) as base ports when the RS is bound to localhost

Base ports are changed to defaults 16020 & 16030 when RS binds to localhost. This is mostly used in pseudo distributed mode.

bin/local-regionservers.sh

@@ -18,7 +18,11 @@
 # */
 # This is used for starting multiple regionservers on the same machine.
 # run it from hbase-dir/ just like 'bin/hbase'
-# Supports up to 100 regionservers (limitation = overlapping ports)
+# Supports up to 10 regionservers (limitation = overlapping ports)
+# For supporting more instances select different values (e.g. 16200, 16300)
+# for HBASE_RS_BASE_PORT and HBASE_RS_INFO_BASE_PORT below
+HBASE_RS_BASE_PORT=16020
+HBASE_RS_INFO_BASE_PORT=16030
 
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin" >/dev/null && pwd`
@@ -44,8 +48,8 @@ run_regionserver () {
   DN=$2
   export HBASE_IDENT_STRING="$USER-$DN"
   HBASE_REGIONSERVER_ARGS="\
-    -Dhbase.regionserver.port=`expr 16200 + $DN` \
-    -Dhbase.regionserver.info.port=`expr 16300 + $DN`"
+    -Dhbase.regionserver.port=`expr $HBASE_RS_BASE_PORT + $DN` \
+    -Dhbase.regionserver.info.port=`expr $HBASE_RS_INFO_BASE_PORT + $DN`"
 
   "$bin"/hbase-daemon.sh  --config "${HBASE_CONF_DIR}" \
     --autostart-window-size "${AUTOSTART_WINDOW_SIZE}" \

bin/regionservers.sh

@@ -60,8 +60,8 @@ fi
 regionservers=`cat "$HOSTLIST"`
 if [ "$regionservers" = "localhost" ]; then
   HBASE_REGIONSERVER_ARGS="\
-    -Dhbase.regionserver.port=16201 \
-    -Dhbase.regionserver.info.port=16301"
+    -Dhbase.regionserver.port=16020 \
+    -Dhbase.regionserver.info.port=16030"
 
   $"${@// /\\ }" ${HBASE_REGIONSERVER_ARGS} \
         2>&1 | sed "s/^/$regionserver: /" &

src/main/asciidoc/_chapters/getting_started.adoc

@@ -392,10 +392,10 @@ Running multiple HRegionServers on the same system can be useful for testing in
 The `local-regionservers.sh` command allows you to run multiple RegionServers.
 It works in a similar way to the `local-master-backup.sh` command, in that each parameter you provide represents the port offset for an instance.
 Each RegionServer requires two ports, and the default ports are 16020 and 16030.
-However, the base ports for additional RegionServers are not the default ports since the default ports are used by the HMaster, which is also a RegionServer since HBase version 1.0.0.
-The base ports are 16200 and 16300 instead.
-You can run 99 additional RegionServers that are not a HMaster or backup HMaster, on a server.
-The following command starts four additional RegionServers, running on sequential ports starting at 16202/16302 (base ports 16200/16300 plus 2).
+Since HBase version 1.1.0, HMaster doesn't use region server ports, this leaves 10 ports (16020 to 16029 and 16030 to 16039) to be used for RegionServers.
+For supporting additional RegionServers, base ports can be changed in script 'local-regionservers.sh' to appropriate value.
+e.g. With values 16200 and 16300 for base ports, 99 additional RegionServers can be supported, on a server.
+The following command starts four additional RegionServers, running on sequential ports starting at 16022/16032 (base ports 16020/16030 plus 2).
 +
 ----