datastax-enterprise cassandra升级后日志异常

Question

我最近将datastax-enterprise从4.8.16升级到5.0.15。升级后，我在日志中看到了下面的异常，尽管Cassandra查询运行良好。

INFO   [epollEventLoopGroup-6-10 - org.apache.cassandra.transport.Message:627] Unexpected exception during request; channel = [id: 0x9b377ba1, L:/10.26.156.233:9042 ! R:/10.26.143.14:43788]
java.nio.channels.ClosedChannelException: null
    at io.netty.channel.AbstractChannel$AbstractUnsafe.close(...)(Unknown Source)
2018-12-11 09:35:42.478 INFO   [epollEventLoopGroup-6-10 - org.apache.cassandra.transport.Message:627] Unexpected exception during request; channel = [id: 0x9b377ba1, L:/10.26.156.233:9042 ! R:/10.26.143.14:43788]
java.nio.channels.ClosedChannelException: null

Answer 1

我能够解决这个问题。由于DSE Cassandra 5.0不支持Thrift协议，并且一些应用程序(不要问我为什么，一些非常旧的应用程序)使用Thrift协议连接到升级的cassandra，从而导致此错误。