在具有3个节点的生产环境中，本地仲裁偶尔会发生插入失败，我们只得到Cassandra::Errors::TimeoutError而不是Cassandra::Errors::WriteTimeoutError，我认为这说明它无法连接到节点，但我没有得到Cassandra::Errors::NoHostsAvailable: All attempted hosts failed
我看了看cassandra的日志，什么都没有，应用程序日志显示错误
它每天发生1 k，通常从呼叫方重试结果成功.
我猜司机有问题

ruby '~> 2.7'
    gem "cassandra-driver", "~> 3.2.5"

consistency:           :local_quorum,

    load_balancing_policies = {
        dc_aware_round_robin: Cassandra::LoadBalancing::Policies::DCAwareRoundRobin.new(
            datacenter,
            cassandra_used_hosts_per_remote_dc
        ),
        round_robin: Cassandra::LoadBalancing::Policies::RoundRobin.new
    }

CASSANDRA_CONNECT_TIMEOUT_MS: '600'
CASSANDRA_CONSISTENCY: LOCAL_QUORUM
CASSANDRA_RECONNECT_INITIAL_INTERVAL_MS: '100'
CASSANDRA_RECONNECT_MAX_INTERVAL_MS: '3000'
CASSANDRA_RECONNECT_MAX_RETRIES: '5'
CASSANDRA_RETRIES: '5'
CASSANDRA_RETRY_MAX_MS: '3000'
CASSANDRA_RETRY_MIN_MS: '100'

所以看了看lib/cassandra/future.rb

# Returns future value or raises future error
    #
    # @note This method blocks until a future is resolved or a times out
    #
    # @param timeout [nil, Numeric] a maximum number of seconds to block
    #   current thread for while waiting for this future to resolve. Will
    #   wait indefinitely if passed `nil`.
    #
    # @raise [Errors::TimeoutError] raised when wait time exceeds the timeout
    # @raise [Exception] raises when the future has been resolved with an
    #   error. The original exception will be raised.
    #
    # @return [Object] the value that the future has been resolved with
    def get(timeout = nil)
      @signal.get(timeout)
    end

Cassandra::Errors::TimeoutError
Timed out

在非应用程序中崩溃：cassandra/future.rb in get
cassandra/future.rb在get中，第402行
cassandra/session.rb在执行第127行

/srv/_versions/events/events-202304261636-9ba0b992cd-master/vendor/bundle/ruby/2.7.0/gems/cassandra-driver-3.2.5/lib/cassandra/future.rb:637:in 'get',
/srv/_versions/events/events-202304261636-9ba0b992cd-master/vendor/bundle/ruby/2.7.0/gems/cassandra-driver-3.2.5/lib/cassandra/future.rb:402:in 'get',
/srv/_versions/events/events-202304261636-9ba0b992cd-master/vendor/bundle/ruby/2.7.0/gems/cassandra-driver-3.2.5/lib/cassandra/session.rb:127:in 'execute'