Spring cloud 使用zuul会发生大量关闭等待

当我使用springcloud zuul时，有大量TCP关闭等待状态发生，有人知道为什么会发生这种情况吗

这是我的zuul配置

母体聚甲醛

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.9.RELEASE</version>
    <relativePath />
</parent>

爪哇

当我访问时，创建了tcp链接，端口8082是hello服务器

    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21505 ESTABLISHED 47968/java          
    tcp        0      0 ::ffff:192.168.120.20:21505 ::ffff:192.168.120.20:8082 ESTABLISHED 132689/java         
    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21510 ESTABLISHED 47968/java  
    tcp        0      0 ::ffff:192.168.120.20:21510 ::ffff:192.168.120.20:8082 ESTABLISHED 132689/java        
    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21504 ESTABLISHED 47968/java          
    tcp        0      0 ::ffff:192.168.120.20:21504 ::ffff:192.168.120.20:8082 ESTABLISHED 132689/java

然后就变了

    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21505 FIN_WAIT2   -                   
    tcp        1      0 ::ffff:192.168.120.20:21505 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java         
    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21510 FIN_WAIT2    -        
    tcp        0      0 ::ffff:192.168.120.20:21510 ::ffff:192.168.120.20:8082 CLOSE_WAIT 132689/java 
    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21504 FIN_WAIT2   -                   
    tcp        1      0 ::ffff:192.168.120.20:21504 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java  

最后,

    tcp        1      0 ::ffff:192.168.120.20:21505 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java         
    tcp        1      0 ::ffff:192.168.120.20:21504 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java         
    tcp        1      0 ::ffff:192.168.120.20:21510 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java 

---

此状态将持续数小时。

CLOSE\u WAIT

如下所述：

此端点已收到来自远程端点的关闭请求，此TCP现在正在等待来自本地应用程序的连接终止请求

Ribbon使用连接池向上游发送请求。每次，它都会释放连接而不是关闭连接，以避免建立新连接的开销

池中的连接通过配置

ribbon.PoolKeepAliveTime

具有活动时间，默认值为15*60秒

public class DefaultClientConfigImpl implements IClientConfig {
    public static final long DEFAULT_POOL_KEEP_ALIVE_TIME = 15 * 60L;
    public static final TimeUnit DEFAULT_POOL_KEEP_ALIVE_TIME_UNITS = TimeUnit.SECONDS;
}


public class OkHttpRibbonConfiguration {
@Value("${ribbon.client.name}")
private String name = "client";

@Configuration
protected static class OkHttpClientConfiguration {
    private OkHttpClient httpClient;

    @Bean
    @ConditionalOnMissingBean(ConnectionPool.class)
    public ConnectionPool httpClientConnectionPool(IClientConfig config, OkHttpClientConnectionPoolFactory connectionPoolFactory) {
        Integer maxTotalConnections = config.getPropertyAsInteger(
                CommonClientConfigKey.MaxTotalConnections,
                DefaultClientConfigImpl.DEFAULT_MAX_TOTAL_CONNECTIONS);
        Object timeToLiveObj = config
                .getProperty(CommonClientConfigKey.PoolKeepAliveTime);
        Long timeToLive = DefaultClientConfigImpl.DEFAULT_POOL_KEEP_ALIVE_TIME;
        Object ttlUnitObj = config
                .getProperty(CommonClientConfigKey.PoolKeepAliveTimeUnits);
        TimeUnit ttlUnit = DefaultClientConfigImpl.DEFAULT_POOL_KEEP_ALIVE_TIME_UNITS;
        if (timeToLiveObj instanceof Long) {
            timeToLive = (Long) timeToLiveObj;
        }
        if (ttlUnitObj instanceof TimeUnit) {
            ttlUnit = (TimeUnit) ttlUnitObj;
        }
        return connectionPoolFactory.create(maxTotalConnections, timeToLive, ttlUnit);
    }

}

---

感谢您的回答，在我的环境中，关闭等待状态持续数小时，更改参数

ribbon.PoolKeepAliveTime

是没有用的。当我删除以下配置时，问题消失了，但仍然不知道为什么，我将继续关注它。ribbon.MaxAutoRetries=0 ribbon.MaxAutoRetriesNextServer=1 ribbon.OktoretryonalOperations=false ribbon.httpclient.enabled=false ribbon.okhttp.enabled=true

    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21505 FIN_WAIT2   -                   
    tcp        1      0 ::ffff:192.168.120.20:21505 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java         
    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21510 FIN_WAIT2    -        
    tcp        0      0 ::ffff:192.168.120.20:21510 ::ffff:192.168.120.20:8082 CLOSE_WAIT 132689/java 
    tcp        0      0 ::ffff:192.168.120.20:8082 ::ffff:192.168.120.20:21504 FIN_WAIT2   -                   
    tcp        1      0 ::ffff:192.168.120.20:21504 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java  

    tcp        1      0 ::ffff:192.168.120.20:21505 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java         
    tcp        1      0 ::ffff:192.168.120.20:21504 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java         
    tcp        1      0 ::ffff:192.168.120.20:21510 ::ffff:192.168.120.20:8082 CLOSE_WAIT  132689/java 

public class DefaultClientConfigImpl implements IClientConfig {
    public static final long DEFAULT_POOL_KEEP_ALIVE_TIME = 15 * 60L;
    public static final TimeUnit DEFAULT_POOL_KEEP_ALIVE_TIME_UNITS = TimeUnit.SECONDS;
}


public class OkHttpRibbonConfiguration {
@Value("${ribbon.client.name}")
private String name = "client";

@Configuration
protected static class OkHttpClientConfiguration {
    private OkHttpClient httpClient;

    @Bean
    @ConditionalOnMissingBean(ConnectionPool.class)
    public ConnectionPool httpClientConnectionPool(IClientConfig config, OkHttpClientConnectionPoolFactory connectionPoolFactory) {
        Integer maxTotalConnections = config.getPropertyAsInteger(
                CommonClientConfigKey.MaxTotalConnections,
                DefaultClientConfigImpl.DEFAULT_MAX_TOTAL_CONNECTIONS);
        Object timeToLiveObj = config
                .getProperty(CommonClientConfigKey.PoolKeepAliveTime);
        Long timeToLive = DefaultClientConfigImpl.DEFAULT_POOL_KEEP_ALIVE_TIME;
        Object ttlUnitObj = config
                .getProperty(CommonClientConfigKey.PoolKeepAliveTimeUnits);
        TimeUnit ttlUnit = DefaultClientConfigImpl.DEFAULT_POOL_KEEP_ALIVE_TIME_UNITS;
        if (timeToLiveObj instanceof Long) {
            timeToLive = (Long) timeToLiveObj;
        }
        if (ttlUnitObj instanceof TimeUnit) {
            ttlUnit = (TimeUnit) ttlUnitObj;
        }
        return connectionPoolFactory.create(maxTotalConnections, timeToLive, ttlUnit);
    }

}