Java datastax driver connection=ApacheIgnite和cassandra（您可能希望增加每个主机连接的驱动程序数量）

组件：ApacheIgnite+ApacheCassandra。使用defaut数据驱动程序。 在做了几次操作（大约30-50亿个实体被放入缓存）之后，我们得到了一个情况，即datastax驱动程序总是从ignite重新连接到cassandra

2017-02-16 13:29:21.287  INFO 160487 --- [ sys-#441%null%] m.r.t.d.c.m.p.c.c.p.RetryPolicyImpl      :  init cluster
2017-02-16 13:29:21.288  INFO 160487 --- [ sys-#441%null%] com.datastax.driver.core.Cluster         : New Cassandra host <our host> added
2017-02-16 13:29:21.307  INFO 160487 --- [ sys-#441%null%] m.r.t.d.c.m.p.c.c.p.RetryPolicyImpl      :  close cluster
2017-02-16 13:29:23.516  INFO 160487 --- [ sys-#441%null%] com.datastax.driver.core.ClockFactory    : Using native clock to generate timestamps.
2017-02-16 13:29:23.537  INFO 160487 --- [ sys-#441%null%] c.d.d.c.p.DCAwareRoundRobinPolicy        : Using data-center name 'datacenter1' for DCAw

配置缓存=>

 CacheConfiguration<KeyIgnite, Long> cfg = new CacheConfiguration<>();
        cfg
                .setName(area)
                .setRebalanceMode(CacheRebalanceMode.SYNC)
                .setStartSize(1_000_000)
                .setAtomicityMode(CacheAtomicityMode.ATOMIC)
                .setIndexedTypes(KeyIgnite.class, Long.class)
                .setCacheMode(CacheMode.PARTITIONED)
                .setBackups(0);

        if (!clientMode) {

            CassandraCacheStoreFactory<KeyIgnite, Long> csFactory = new CassandraCacheStoreFactory<>();
            csFactory.setDataSource(ds);
            csFactory.setPersistenceSettings(kv);

//            CassandraCacheStoreFactoryDwh<KeyIgnite, Long> csFactory = new CassandraCacheStoreFactoryDwh<>(ds, kv,params);

            cfg
                    .setCacheStoreFactory(csFactory)
                    .setReadThrough(true)
                    .setWriteThrough(true);
        }

        cfg.setExpiryPolicyFactory(TouchedExpiryPolicy.factoryOf(new Duration(TimeUnit.DAYS, 5)));
        return cfg;

当我们做了几次将项目放入缓存的迭代后，我们得到了这种情况

包括调试级别后，我得到了以下记录：

2017-02-17 17:48:41.570 DEBUG 24816 --- [ sys-#184%null%] com.datastax.driver.core.RequestHandler  : [1071994376-1] Error querying ds-inmemorydb-02t/10.216.28.34:9042 : com.datastax.driver.core.exceptions.DriverException: Timeout while trying to acquire available connection (you may want to increase the driver number of per-host connections)

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驱动程序上的超时增加有助于

当我们并行启动超过10个客户端节点时，就会出现这种情况。Boris，您可以添加收到“超时”消息的节点的线程转储吗？您还应该了解这些节点上的其他连接在忙什么。

   TcpDiscoveryMulticastIpFinder finder = new TcpDiscoveryMulticastIpFinder();
        finder.setAddresses(adresses);

        return Ignition.start(
                new IgniteConfiguration()
                        .setClientMode(clientMode)
                        .setDiscoverySpi(new TcpDiscoverySpi().setIpFinder(finder).setNetworkTimeout(10000))
                        .setFailureDetectionTimeout(50000)
                        .setPeerClassLoadingEnabled(false)
                        .setLoadBalancingSpi(new RoundRobinLoadBalancingSpi())

        );

2017-02-17 17:48:41.570 DEBUG 24816 --- [ sys-#184%null%] com.datastax.driver.core.RequestHandler  : [1071994376-1] Error querying ds-inmemorydb-02t/10.216.28.34:9042 : com.datastax.driver.core.exceptions.DriverException: Timeout while trying to acquire available connection (you may want to increase the driver number of per-host connections)