用于第二个Hibernate缓存的Hazelcast实例无法在Kubernetes中稳定连接

我使用Kubernetes（GKE）中部署的嵌入式Hazelcast在Spring Boot应用程序中启用二级缓存Hibernate。Spingboot应用程序使用spanner-jdbc（https://github.com/olavloite/spanner-jdbc）连接到Spanner 。我将1个服务（副本= 2）部署到k8s，但是位于2个pod中的hazelcast实例无法稳定连接（它在服务器启动时起作用，但之后似乎断开连接，请在下面的日志中）。这导致2个pod之间无法共享第2级缓存。

com.hazelcast.poc
hazelcast-poc
0.0.1-SNAPSHOT
hazelcast-poc
Demo project for Spring Boot

<java.version>1.8</java.version>

<dependency>
    <groupId>nl.topicus</groupId>
    <artifactId>spanner-jdbc</artifactId>
    <version>1.0.8</version>
</dependency>

<dependency>
    <groupId>nl.topicus</groupId>
    <artifactId>spanner-hibernate</artifactId>
    <version>0.7</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
    <groupId>com.hazelcast</groupId>
    <artifactId>hazelcast</artifactId>
    <version>3.11</version>
</dependency>
<dependency>
    <groupId>com.hazelcast</groupId>
    <artifactId>hazelcast-hibernate5</artifactId>
    <version>1.3.0</version>
</dependency>
<dependency>
    <groupId>com.hazelcast</groupId>
    <artifactId>hazelcast-kubernetes</artifactId>
    <version>1.3.1</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

<dependency>
    <groupId>org.assertj</groupId>
    <artifactId>assertj-core</artifactId>
    <version>3.8.0</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.hamcrest</groupId>
    <artifactId>hamcrest-all</artifactId>
    <version>1.3</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>com.fasterxml.uuid</groupId>
    <artifactId>java-uuid-generator</artifactId>
    <version>3.1.5</version>