当我的应用程序运行很长时间时，一切都正常。但是，当我将类型a列从int更改为text（删除表并重新创建）时，发现了一个异常：

com.datastax.oss.driver.api.core.type.codec.CodecNotFoundException: Codec not found for requested operation: [INT <-> java.lang.String]
    at com.datastax.oss.driver.internal.core.type.codec.registry.CachingCodecRegistry.createCodec(CachingCodecRegistry.java:609)
    at com.datastax.oss.driver.internal.core.type.codec.registry.DefaultCodecRegistry$1.load(DefaultCodecRegistry.java:95)
    at com.datastax.oss.driver.internal.core.type.codec.registry.DefaultCodecRegistry$1.load(DefaultCodecRegistry.java:92)
    at com.datastax.oss.driver.shaded.guava.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)
    at com.datastax.oss.driver.shaded.guava.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2276)
    at com.datastax.oss.driver.shaded.guava.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2154)
    at com.datastax.oss.driver.shaded.guava.common.cache.LocalCache$Segment.get(LocalCache.java:2044)
    at com.datastax.oss.driver.shaded.guava.common.cache.LocalCache.get(LocalCache.java:3951)
    at com.datastax.oss.driver.shaded.guava.common.cache.LocalCache.getOrLoad(LocalCache.java:3973)
    at com.datastax.oss.driver.shaded.guava.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4957)
    at com.datastax.oss.driver.shaded.guava.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4963)
    at com.datastax.oss.driver.internal.core.type.codec.registry.DefaultCodecRegistry.getCachedCodec(DefaultCodecRegistry.java:117)
    at com.datastax.oss.driver.internal.core.type.codec.registry.CachingCodecRegistry.codecFor(CachingCodecRegistry.java:215)
    at com.datastax.oss.driver.api.core.data.SettableByIndex.set(SettableByIndex.java:132)
    at com.datastax.oss.driver.api.core.data.SettableByIndex.setString(SettableByIndex.java:338)

此异常偶尔出现。我使用preparedstatement来执行查询，我认为它是从datastax的驱动程序缓存的。
我使用的是aws密钥空间（cassandra版本3.11.2），datastax驱动程序4.6。这是我的application.conf：

basic.request {
    timeout = 5 seconds
    consistency = LOCAL_ONE
  }
  advanced.connection {
    max-requests-per-connection = 1024
    pool {
      local.size = 1
      remote.size = 1
    }
  }
  advanced.reconnect-on-init = true
  advanced.reconnection-policy {
    class = ExponentialReconnectionPolicy
    base-delay = 1 second
    max-delay = 60 seconds
  }
  advanced.retry-policy {
    class = DefaultRetryPolicy
  }
  advanced.protocol {
    version = V4
  }
  advanced.heartbeat {
   interval = 30 seconds
   timeout = 1 second
  }
  advanced.session-leak.threshold = 8
  advanced.metadata.token-map.enabled = false
}