异常如下：
No route info of this topic, flight_data_sync_iaoc
See http://docs.aliyun.com/cn#/pub/ons/faq/exceptions&topic_not_exist for further details.
18:27:29.683 [NettyClientSelector_1] WARN c.a.r.s.i.n.c.ChannelInitializer - [warn,151] - Failed to initialize a channel. Closing: [id: 0x52e8fb3e]
java.util.concurrent.RejectedExecutionException: event executor terminated
at com.alibaba.rocketmq.shade.io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:715)
at com.alibaba.rocketmq.shade.io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:300)
at com.alibaba.rocketmq.shade.io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:691)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
at com.alibaba.rocketmq.shade.io.netty.util.concurrent.AbstractEventExecutor.submit(AbstractEventExecutor.java:91)
at com.alibaba.rocketmq.shade.io.netty.channel.DefaultChannelPipeline.addLast(DefaultChannelPipeline.java:210)
at com.alibaba.rocketmq.shade.io.netty.channel.DefaultChannelPipeline.addLast(DefaultChannelPipeline.java:390)
at com.alibaba.rocketmq.remoting.netty.NettyRemotingClient$4.initChannel(NettyRemotingClient.java:150)
at com.alibaba.rocketmq.remoting.netty.NettyRemotingClient$4.initChannel(NettyRemotingClient.java:147)
at com.alibaba.rocketmq.shade.io.netty.channel.ChannelInitializer.channelRegistered(ChannelInitializer.java:68)
at com.alibaba.rocketmq.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRegistered(AbstractChannelHandlerContext.java:118)
at com.alibaba.rocketmq.shade.io.netty.channel.AbstractChannelHandlerContext.fireChannelRegistered(AbstractChannelHandlerContext.java:104)
at com.alibaba.rocketmq.shade.io.netty.channel.DefaultChannelPipeline.fireChannelRegistered(DefaultChannelPipeline.java:846)
at com.alibaba.rocketmq.shade.io.netty.channel.AbstractChannel$AbstractUnsafe.register0(AbstractChannel.java:453)
at com.alibaba.rocketmq.shade.io.netty.channel.AbstractChannel$AbstractUnsafe.access$200(AbstractChannel.java:370)
at com.alibaba.rocketmq.shade.io.netty.channel.AbstractChannel$AbstractUnsafe$1.run(AbstractChannel.java:420)
at com.alibaba.rocketmq.shade.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358)
at com.alibaba.rocketmq.shade.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:374)
at com.alibaba.rocketmq.shade.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)
at java.lang.Thread.run(Thread.java:745)
1、你是不是限制了主题数量？
2、你是不是开启了自动创建主题？
3、你网络是不是有限制？