Question

我正在使用DataStax驱动程序连接到Cassandra节点。下面是连接器的代码。

public void connect(String node, Integer port, String username, String password) throws Exception {
        try {
            Builder b = Cluster.builder().addContactPoint(node).withCredentials(username.trim(), password.trim());
            if (port != null) {
                b.withPort(port);
            }
            cluster = b.build();

            session = cluster.connect();
        } catch (Exception e) {
            throw new Exception("can not connect to the node :"+e.getMessage());
        }
    }

我在Cassandra.yaml文件中设置了身份验证器

authenticator：PasswordAuthenticator

在调用connect方法时，显示以下错误：

主机localhost / 127.0.0.1上的身份验证错误：9042：主机 localhost / 127.0.0.1:9042需要身份验证，但不需要身份验证器在群集配置中找到

cqlsh shell能够使用Cassandra的相同配置连接到节点。谁能说出我在这里失踪了什么？

编辑：异常堆栈在

com.datastax.driver.core.AuthProvider $ 1.newAuthenticator（AuthProvider.java:40）在com.datastax.driver.core.Connection $ 5.apply（Connection.java:259）在com.datastax.driver.core.Connection $ 5.apply（Connection.java:244）在 com.google.common.util.concurrent.AbstractTransformFuture $ AsyncTransformFuture.doTransform（AbstractTransformFuture.java:211）在 com.google.common.util.concurrent.AbstractTransformFuture $ AsyncTransformFuture.doTransform（AbstractTransformFuture.java:200）在 com.google.common.util.concurrent.AbstractTransformFuture.run（AbstractTransformFuture.java:130）在 com.google.common.util.concurrent.MoreExecutors $ DirectExecutor.execute（MoreExecutors.java:399）在 com.google.common.util.concurrent.AbstractFuture.executeListener（AbstractFuture.java:902）在 com.google.common.util.concurrent.AbstractFuture.complete（AbstractFuture.java:813）在 com.google.common.util.concurrent.AbstractFuture.set（AbstractFuture.java:655）在 com.datastax.driver.core.Connection $ Future.onSet（Connection.java:1302）在 com.datastax.driver.core.Connection $ Dispatcher.channelRead0（Connection.java:1083）在 com.datastax.driver.core.Connection $ Dispatcher.channelRead0（Connection.java:1006）在 io.netty.channel.SimpleChannelInboundHandler.channelRead（SimpleChannelInboundHandler.java:105）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:362）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:348）在 io.netty.channel.AbstractChannelHandlerContext.fireChannelRead（AbstractChannelHandlerContext.java:340）在 io.netty.handler.timeout.IdleStateHandler.channelRead（IdleStateHandler.java:286）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:362）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:348）在 io.netty.channel.AbstractChannelHandlerContext.fireChannelRead（AbstractChannelHandlerContext.java:340）在 io.netty.handler.codec.MessageToMessageDecoder.channelRead（MessageToMessageDecoder.java:102）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:362）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:348）在 io.netty.channel.AbstractChannelHandlerContext.fireChannelRead（AbstractChannelHandlerContext.java:340）在 io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead（ByteToMessageDecoder.java:310）在 io.netty.handler.codec.ByteToMessageDecoder.channelRead（ByteToMessageDecoder.java:284）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:362）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:348）在 io.netty.channel.AbstractChannelHandlerContext.fireChannelRead（AbstractChannelHandlerContext.java:340）在 io.netty.channel.DefaultChannelPipeline $ HeadContext.channelRead（DefaultChannelPipeline.java:1359）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:362）在 io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead（AbstractChannelHandlerContext.java:348）在 io.netty.channel.DefaultChannelPipeline.fireChannelRead（DefaultChannelPipeline.java:935）在 io.netty.channel.nio.AbstractNioByteChannel $ NioByteUnsafe.read（AbstractNioByteChannel.java:141）在 io.netty.channel.nio.NioEventLoop.processSelectedKey（NioEventLoop.java:645）在 io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized（NioEventLoop.java:580）在 io.netty.channel.nio.NioEventLoop.processSelectedKeys（NioEventLoop.java:497）在io.netty.channel.nio.NioEventLoop.run（NioEventLoop.java:459）at io.netty.util.concurrent.SingleThreadEventExecutor $ 5.run（SingleThreadEventExecutor.java:886）在 io.netty.util.concurrent.FastThreadLocalRunnable.run（FastThreadLocalRunnable.java:30）在java.lang.Thread.run（Thread.java:745）

Answer 1

解决了：

错误是由于某些后台线程试图在没有身份验证的情况下连接到服务器，这些在以前的调试会话中未被终止！

java

1 个答案: