specified spring-boot-maven-plugin version

executor/pom.xml

@@ -41,6 +41,7 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>2.3.4.RELEASE</version>
                 <executions>
                     <execution>
                         <goals>

reader/pom.xml

@@ -37,6 +37,7 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>2.3.4.RELEASE</version>
                 <executions>
                     <execution>
                         <goals>

writer/pom.xml

@@ -39,6 +39,7 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>2.3.4.RELEASE</version>
                 <executions>
                     <execution>
                         <goals>