diff --git a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/utils/FlinkArgsUtils.java b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/utils/FlinkArgsUtils.java
index 2431eedd16..519ddf205c 100644
--- a/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/utils/FlinkArgsUtils.java
+++ b/dolphinscheduler-server/src/main/java/org/apache/dolphinscheduler/server/utils/FlinkArgsUtils.java
@@ -64,9 +64,9 @@ public class FlinkArgsUtils {
                 args.add(ArgsUtils.escape(appName));
             }
 
-            // judge flink version,from flink1.10,the parameter -yn removed
+            // judge flink version, the parameter -yn has removed from flink 1.10
             String flinkVersion = param.getFlinkVersion();
-            if (FLINK_VERSION_BEFORE_1_10.equals(flinkVersion)) {
+            if (flinkVersion == null || FLINK_VERSION_BEFORE_1_10.equals(flinkVersion)) {
                 int taskManager = param.getTaskManager();
                 if (taskManager != 0) {                        //-yn
                     args.add(Constants.FLINK_TASK_MANAGE);
diff --git a/install.sh b/install.sh
index 7991275a01..723ee908e8 100755
--- a/install.sh
+++ b/install.sh
@@ -53,7 +53,7 @@ sed -i ${txt} "s#java.security.krb5.conf.path.*#java.security.krb5.conf.path=${k
 sed -i ${txt} "s#login.user.keytab.username.*#login.user.keytab.username=${keytabUserName}#g" conf/common.properties
 sed -i ${txt} "s#login.user.keytab.path.*#login.user.keytab.path=${keytabPath}#g" conf/common.properties
 sed -i ${txt} "s#zookeeper.quorum.*#zookeeper.quorum=${zkQuorum}#g" conf/zookeeper.properties
-sed -i ${txt} "s\#zookeeper.dolphinscheduler.root.*#zookeeper.dolphinscheduler.root=${zkRoot}#g" conf/zookeeper.properties
+sed -i ${txt} "s#\#zookeeper.dolphinscheduler.root.*#zookeeper.dolphinscheduler.root=${zkRoot}#g" conf/zookeeper.properties
 sed -i ${txt} "s#server.port.*#server.port=${apiServerPort}#g" conf/application-api.properties
 sed -i ${txt} "s#mail.server.host.*#mail.server.host=${mailServerHost}#g" conf/alert.properties
 sed -i ${txt} "s#mail.server.port.*#mail.server.port=${mailServerPort}#g" conf/alert.properties