如何在spring boot中禁用Hazelcast的默认关闭钩子

Question

我正在使用Hazelcast开发Web套接字应用程序来分享在线用户的状态。一切正常，除了一个应用程序实例关闭或重新启动时，连接到该实例的所有用户都断开连接，afterConnectionClosed MessagingHandler扩展BinaryWebSocketHandler。在afterConnectionClosed中，将更新连接到当前节点的用户的状态，并且这些状态位于Hazelcast中。因此，当它尝试从Hazelcast中删除状态时，会出现以下错误：

com.hazelcast.core.HazelcastInstanceNotActiveException: State: SHUT_DOWN Operation: class com.hazelcast.map.impl.operation.RemoveOperation
        at com.hazelcast.spi.impl.operationservice.impl.Invocation.engineActive(Invocation.java:490)
        at com.hazelcast.spi.impl.operationservice.impl.Invocation.doInvoke(Invocation.java:523)
        at com.hazelcast.spi.impl.operationservice.impl.Invocation.invoke0(Invocation.java:513)
        at com.hazelcast.spi.impl.operationservice.impl.Invocation.invoke(Invocation.java:207)
        at com.hazelcast.spi.impl.operationservice.impl.InvocationBuilderImpl.invoke(InvocationBuilderImpl.java:60)
        at com.hazelcast.map.impl.proxy.MapProxySupport.invokeOperation(MapProxySupport.java:423)
        at com.hazelcast.map.impl.proxy.MapProxySupport.removeInternal(MapProxySupport.java:563)
        at com.hazelcast.map.impl.proxy.MapProxyImpl.remove(MapProxyImpl.java:207)
        at com.nisheeth.spring.MessageHandler.afterConnectionClosed(MessageHandler.java:57)
        at org.springframework.web.socket.handler.WebSocketHandlerDecorator.afterConnectionClosed(WebSocketHandlerDecorator.java:85)
        at org.springframework.web.socket.handler.LoggingWebSocketHandlerDecorator.afterConnectionClosed(LoggingWebSocketHandlerDecorator.java:72)
        at org.springframework.web.socket.handler.ExceptionWebSocketHandlerDecorator.afterConnectionClosed(ExceptionWebSocketHandlerDecorator.java:78)
        at org.springframework.web.socket.adapter.standard.StandardWebSocketHandlerAdapter.onClose(StandardWebSocketHandlerAdapter.java:141)
        at org.apache.tomcat.websocket.WsSession.fireEndpointOnClose(WsSession.java:535)
        at org.apache.tomcat.websocket.WsSession.doClose(WsSession.java:481)
        at org.apache.tomcat.websocket.WsSession.close(WsSession.java:445)
        at org.apache.tomcat.websocket.WsWebSocketContainer.destroy(WsWebSocketContainer.java:960)
        at org.apache.tomcat.websocket.server.WsContextListener.contextDestroyed(WsContextListener.java:48)
        at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4792)
        at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5429)
        at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:226)
        at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1435)
        at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1424)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
        at ------ submitted from ------.(Unknown Source)
        at com.hazelcast.spi.impl.operationservice.impl.InvocationFuture.resolve(InvocationFuture.java:127)
        at com.hazelcast.spi.impl.operationservice.impl.InvocationFuture.resolveAndThrowIfException(InvocationFuture.java:79)
        at com.hazelcast.spi.impl.AbstractInvocationFuture.get(AbstractInvocationFuture.java:147)
        at com.hazelcast.map.impl.proxy.MapProxySupport.invokeOperation(MapProxySupport.java:424)
        at com.hazelcast.map.impl.proxy.MapProxySupport.removeInternal(MapProxySupport.java:563)
        at com.hazelcast.map.impl.proxy.MapProxyImpl.remove(MapProxyImpl.java:207)
        at com.nisheeth.spring.MessageHandler.afterConnectionClosed(MessageHandler.java:57)
        at org.springframework.web.socket.handler.WebSocketHandlerDecorator.afterConnectionClosed(WebSocketHandlerDecorator.java:85)
        at org.springframework.web.socket.handler.LoggingWebSocketHandlerDecorator.afterConnectionClosed(LoggingWebSocketHandlerDecorator.java:72)
        at org.springframework.web.socket.handler.ExceptionWebSocketHandlerDecorator.afterConnectionClosed(ExceptionWebSocketHandlerDecorator.java:78)
        at org.springframework.web.socket.adapter.standard.StandardWebSocketHandlerAdapter.onClose(StandardWebSocketHandlerAdapter.java:141)
        at org.apache.tomcat.websocket.WsSession.fireEndpointOnClose(WsSession.java:535)
        at org.apache.tomcat.websocket.WsSession.doClose(WsSession.java:481)
        at org.apache.tomcat.websocket.WsSession.close(WsSession.java:445)
        at org.apache.tomcat.websocket.WsWebSocketContainer.destroy(WsWebSocketContainer.java:960)
        at org.apache.tomcat.websocket.server.WsContextListener.contextDestroyed(WsContextListener.java:48)
        at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4792)
        at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5429)
        at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:226)
        at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1435)
        at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1424)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

我正在使用以下属性禁用默认关闭：

config.setProperty(GroupProperty.SHUTDOWNHOOK_ENABLED.getName(), "false");
config.setProperty(GroupProperty.SHUTDOWNHOOK_POLICY.getName(), "GRACEFUL");

但是在用户断开连接之前它仍然处于关闭状态。有没有办法在应用程序结束时使用hazelcast关闭方式配置hazelcast？

Answer 1

我一直在尝试不同的方法来处理spring websocket连接的正常关闭，这也修改了在线用户的hazelcast映射，但没有一个工作。我终于使用了SmartLifecycle接口。可以找到此课程的文档here。

这是我用于正确关机的代码。是的，在Hazelcast关闭之前调用它：

@Component
public class AppLifecycle implements SmartLifecycle {

    private Logger log = LoggerFactory.getLogger(AppLifecycle.class);

    @Autowired
    private SampleService sampleService;

    @Override

    public boolean isAutoStartup() {
        log.debug("=========================auto startup=========================");
        return true;
    }

    @Override
    public void stop(Runnable runnable) {
        sampleService.getSessionMap().forEach((key, session) -> {
            try {
                session.close(CloseStatus.SERVICE_RESTARTED);
                log.debug("disconnecting : {}", key);
            } catch (IOException e) {
                log.error(e.getMessage(), e);
            }
        });
        log.debug("=========================stop runnable=========================");
        new Thread(runnable).start();
    }

    @Override
    public void start() {
        log.debug("=========================start=========================");
    }

    @Override
    public void stop() {
        log.debug("=========================stop=========================");
    }

    @Override
    public boolean isRunning() {
        return true;
    }

    @Override
    public int getPhase() {
        return Integer.MAX_VALUE;
    }
}

Answer 2

@ nisheeth-shah，它更像是与Spring有关的问题，因为它的Spring决定了bean的关闭顺序。

您可以做什么，您可以使用MessageHandler注释对@DependsOn bean进行注释，并给出HazelcastInstance bean的名称，如@DependsOn("hazelcastInstance")。有关说明，请参阅此link。基本上，Spring会在创建HazelcastInstance之前启动MessageHandler，并且在HazelcastInstance bean被销毁之前不会关闭MessageHandler。

另外，不要禁用Hazelcast关机钩。

Answer 3

您可以在hazelcastInstance.shutdown()中使用@PreDestroy 即

@PreDestroy
public void shutDownHazelcast(){
        hazelcastInstance.shutdown()
}

这会优雅地关闭hazelcast实例