diff --git a/broker/src/main/java/io/moquette/server/netty/NettyAcceptor.java b/broker/src/main/java/io/moquette/server/netty/NettyAcceptor.java
index e1de77a4..9359d337 100644
--- a/broker/src/main/java/io/moquette/server/netty/NettyAcceptor.java
+++ b/broker/src/main/java/io/moquette/server/netty/NettyAcceptor.java
@@ -150,8 +150,8 @@ public class NettyAcceptor implements ServerAcceptor {
             LOG.error("An interruptedException was caught while initializing server. Protocol={}", protocol, ex);
         } catch (Exception e) {
             e.printStackTrace();
-            LOG.error("端口 {} 已经被占用。请检查该端口被那个程序占用，找到程序停掉。\n查找端口被那个程序占用的命令是: netstat -tunlp | grep {}", port, port);
-            System.out.println("端口 " + port + " 已经被占用。请检查该端口被那个程序占用，找到程序停掉。\n查找端口被那个程序占用的命令是: netstat -tunlp | grep " + port);
+            LOG.error("端口 {} 已经被占用或者无权限使用。如果无权限使用，请以root权限运行；如果被占用，请检查该端口被那个程序占用，找到程序停掉。\n查找端口被那个程序占用的命令是: netstat -tunlp | grep {}", port, port);
+            System.out.println("端口 " + port + " 已经被占用或者无权限使用。如果无权限使用，请以root权限运行；如果被占用，请检查该端口被那个程序占用，找到程序停掉。\n查找端口被那个程序占用的命令是: netstat -tunlp | grep " + port);
             System.exit(-1);
         }
     }
diff --git a/distribution/src/main/assembly/assembly.xml b/distribution/src/main/assembly/assembly.xml
index d1ed9f87..b7a9cbb7 100755
--- a/distribution/src/main/assembly/assembly.xml
+++ b/distribution/src/main/assembly/assembly.xml
@@ -74,12 +74,6 @@
             <destName>moquette-broker-${project.version}.jar</destName>
         </file>
 
-        <file>
-            <source>../common/target/common-${project.version}.jar</source>
-            <outputDirectory>java_client/</outputDirectory>
-            <destName>common-${project.version}.jar</destName>
-        </file>
-
         <file>
             <source>../sdk/target/sdk-${project.version}.jar</source>
             <outputDirectory>server_sdk/</outputDirectory>
diff --git a/distribution/src/main/scripts/wildfirechat.bat b/distribution/src/main/scripts/wildfirechat.bat
index 1aadc903..e0dafc9c 100644
--- a/distribution/src/main/scripts/wildfirechat.bat
+++ b/distribution/src/main/scripts/wildfirechat.bat
@@ -72,4 +72,8 @@ rem set JAVA_OPTS=%JAVA_OPTS% -XX:+UseGCLogFileRotation
 rem set JAVA_OPTS=%JAVA_OPTS% -XX:NumberOfGCLogFiles=10
 rem set JAVA_OPTS=%JAVA_OPTS% -XX:GCLogFileSize=10M"
 
+echo 请设置JVM参数Xmx和Xms！！！
+rem set JAVA_OPTS=%JAVA_OPTS% -Xmx2G
+rem set JAVA_OPTS=%JAVA_OPTS% -Xms2G
+
 %JAVA% -server %JAVA_OPTS% %JAVA_OPTS_SCRIPT% -Dlog4j.configuration=file:%LOG_FILE% -Dcom.mchange.v2.c3p0.cfg.xml=%C3P0_CONF_FILE% -Dhazelcast.configuration=file:%HZ_CONF_FILE% -Dwildfirechat.path=%WILDFIRECHAT_PATH% -cp %WILDFIRECHAT_HOME%\lib\* cn.wildfirechat.server.Server
diff --git a/distribution/src/main/scripts/wildfirechat.sh b/distribution/src/main/scripts/wildfirechat.sh
index 1cfb33aa..0c97ce77 100755
--- a/distribution/src/main/scripts/wildfirechat.sh
+++ b/distribution/src/main/scripts/wildfirechat.sh
@@ -83,8 +83,9 @@ JAVA_OPTS="$JAVA_OPTS -XX:+UseGCLogFileRotation"
 JAVA_OPTS="$JAVA_OPTS -XX:NumberOfGCLogFiles=10"
 JAVA_OPTS="$JAVA_OPTS -XX:GCLogFileSize=10M"
 
-#JAVA_OPTS="$JAVA_OPTS -Xmx128M"
-#JAVA_OPTS="$JAVA_OPTS -Xms128M"
+echo "请设置JVM参数Xmx和Xms！！！"
+#JAVA_OPTS="$JAVA_OPTS -Xmx2G"
+#JAVA_OPTS="$JAVA_OPTS -Xms2G"
 
 
 $JAVA -server $JAVA_OPTS $JAVA_OPTS_SCRIPT -Dlog4j.configuration="file:$LOG_FILE" -Dcom.mchange.v2.c3p0.cfg.xml="$C3P0_CONF_FILE" -Dhazelcast.configuration="file:$HZ_CONF_FILE" -Dwildfirechat.path="$WILDFIRECHAT_PATH" -cp "$WILDFIRECHAT_HOME/lib/*" cn.wildfirechat.server.Server