我有一个应用程序，它使用Java驱动程序连接到Cassandra，获取一些配置，并根据结果生成和执行一些PIG脚本。
现在，当PIG所需的jar不在类路径中时，我能够成功连接到Cassandra。类似地，当我没有使用java驱动程序连接到Cassandra以检索配置时，我能够启动PigServer类并使用整个DSE堆栈执行脚本/语句。
当我同时使用它们时，我得到以下异常：

org.jboss.netty.channel.ChannelPipelineException: Failed to initialize a pipeline.
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:181)
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
        ... 35 more
Caused by: org.jboss.netty.channel.ChannelPipelineException: Failed to initialize a pipeline.
        at org.jboss.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:208)
        at org.jboss.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:182)
        at com.datastax.driver.core.Connection.<init>(Connection.java:100)
        at com.datastax.driver.core.Connection.<init>(Connection.java:51)
        at com.datastax.driver.core.Connection$Factory.open(Connection.java:376)
        at com.datastax.driver.core.ControlConnection.tryConnect(ControlConnection.java:207)
        at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:170)
        at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:87)
        at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:576)
        at com.datastax.driver.core.Cluster$Manager.access$100(Cluster.java:520)
        at com.datastax.driver.core.Cluster.<init>(Cluster.java:67)
        at com.datastax.driver.core.Cluster.buildFrom(Cluster.java:94)
        at com.datastax.driver.core.Cluster$Builder.build(Cluster.java:501)

我看到其他人也看到了类似的异常，但当尝试从MapReduce任务中执行Cassandra语句时，这不是我的情况：https://groups.google.com/a/lists.datastax.com/forum/#!主题/java驱动程序用户/FhW_8e4FyAIhttp://www.datastax.com/dev/blog/the-native-cql-java-driver-goes-ga#comment-297187
谢谢