conflict with namespace and outputDirectory using maven

[ppdouble]

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>nd.pemo</groupId>
    <artifactId>thrift-rpc-sample-client</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.thrift</groupId>
            <artifactId>libthrift</artifactId>
            <version>0.18.1</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.25</version>
        </dependency>
    </dependencies>

    <build>
        <defaultGoal>clean generate-sources compile install</defaultGoal>

        <plugins>
            <plugin>
                <groupId>org.apache.thrift.tools</groupId>
                <artifactId>maven-thrift-plugin</artifactId>
                <version>0.1.11</version>
                <configuration>
                    <generator>java</generator>
                    <thriftExecutable>/usr/bin/thrift</thriftExecutable>
                    <thriftSourceRoot>${basedir}/src/main/resources/thrift</thriftSourceRoot>
                    <outputDirectory>${basedir}/src/main/java/thrift</outputDirectory>
                </configuration>
                <executions>
                    <execution>
                        <id>thrift-sources</id>
                        <phase>generate-sources</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

namespace java thrift.rpc.api.user
namespace cpp thrift.rpc.api.user

struct LoginRequest {
  1: string username,
  2: string password
}

struct APIResponse {
  1: string responsemessage,
  2: i32 responseCode
}

# empty for logout request
struct Empty {
}

# specific response for logout
struct LogoutResponse {
  1: string logoutmessage,
  2: i32 responseCode
}

service User {
  APIResponse login(1:LoginRequest loginRequest);

  LogoutResponse logout(1:Empty empty);

}

The namespace java thrift.rpc.api.user will append another thrift to <outputDirectory>${basedir}/src/main/java/thrift</outputDirectory>. So, it will be src/main/java/thrift/thrift/rpc/api/user. The package of generated classes would be wrong.