在 maven 中运行 junit 测试时，我不断收到此错误：com.datastax.driver.core.TransportException：[/127.0.0.1] 频道已关闭
它最终导致 OutOfMemory 异常。
我正在使用 cassandra-unit 运行嵌入式 cassandra 集群。在几个测试用例之后，它开始抛出以下错误：
java.util.concurrent.ExecutionException: com.datastax.driver.core.TransportException: [/127.0.0.1] Channel has been closed
at com.google.common.util.concurrent.AbstractFuture$Sync.getValue(AbstractFuture.java:306)
at com.google.common.util.concurrent.AbstractFuture$Sync.get(AbstractFuture.java:293)
at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:116)
at com.datastax.driver.core.ControlConnection.refreshSchema(ControlConnection.java:265)
at com.datastax.driver.core.ControlConnection.refreshSchema(ControlConnection.java:230)
at com.datastax.driver.core.Cluster$Manager$2.run(Cluster.java:951)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:680)
Caused by: com.datastax.driver.core.TransportException: [/127.0.0.1] Channel has been closed
at com.datastax.driver.core.Connection$Dispatcher.channelClosed(Connection.java:566)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787)
at org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:60)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787)
at org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:60)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787)
at org.jboss.netty.handler.codec.frame.FrameDecoder.cleanup(FrameDecoder.java:493)
at org.jboss.netty.handler.codec.frame.FrameDecoder.channelClosed(FrameDecoder.java:371)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:88)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:555)
at org.jboss.netty.channel.Channels.fireChannelClosed(Channels.java:468)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.close(AbstractNioWorker.java:351)
at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:93)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:107)
at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:88)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
我试图为进程提供足够的内存（-Xmx2048m -XX:MaxPermSize=512m）但它没有帮助