无法连接到datastax cassandra

Question

我想连接到datastax cassandra数据库。而cassandra的版本是5.0.1。我是一个springboot应用程序，下面是我的pom.xml。我正在使用dse jar连接到数据库。但是，当我开始我的应用程序时，我得到了＃34;所有主机都尝试查询失败＆＃34;。任何人都可以帮我解决这个问题。

http://maven.apache.org/xsd/maven-4.0.0.xsd">     4.0.0

<groupId>com.sample.myproject</groupId>
<artifactId>sampleproject</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<name>productsFilterRules</name>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.3.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
    <java.version>1.8</java.version>
</properties>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-rest</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-aop</artifactId>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
        <version>3.4</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-cassandra</artifactId>
        <exclusions>
            <exclusion>
                <groupId>com.datastax.cassandra</groupId>
                <artifactId>cassandra-driver-core</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>com.datastax.dse</groupId>
        <artifactId>dse-java-driver-core</artifactId>
        <version>1.5.1</version>
    </dependency>

</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>org.jacoco</groupId>
            <artifactId>jacoco-maven-plugin</artifactId>
            <version>0.7.5.201505241946</version>
            <executions>
                <execution>
                    <id>jacoco-initialize</id>
                    <goals>
                        <goal>prepare-agent</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <rules>
                    <rule>
                        <element>CLASS</element>
                        <excludes>
                            <exclude>*Test</exclude>
                        </excludes>
                    </rule>
                </rules>
            </configuration>
        </plugin>
    </plugins>
</build>