【Flink】Flink network netty ProducerFailedException SimpleChannelInboundHandler NullPointerException

1.背景

一个flink程序报错这个

org.apache.flink.runtime.io.network.netty.exception.RemoteTransportException: Error at remote task manager '1.datanode3/72.118.1.15:39701'.
  at org.apache.flink.runtime.io.network.netty.CreditBasedPartitionRequestClientHandler.decodeMsgCreditBasedPartitionRequestClientHandler.java:280)
  at org.apache.flink.runtime.io.network.netty.CreditBasedPartitionRequestClientHandler.channelRead(CreditBasedPartitionRequestClientHandler.java:175)
  at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
  at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
  at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
  at org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:323)
  at org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:297)
  at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
  at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
  at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
  at org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)
  at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
  at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
  at org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)
  at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
  at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:656)
  at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:591)
  at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:508)
  at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:470)
  at org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:909)
  at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.flink.runtime.io.network.partition.ProducerFailedException: java.lang.Exception: java.lang.NullPointerException
  at org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.writeAndFlushNextMessageIfPossible(PartitionRequestQueue.java:221)
  at org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.enqueueAvailableReader(PartitionRequestQueue.java:107)
  at org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.addCredit(PartitionRequestQueue.java:158)
  at org.apache.flink.runtime.io.network.netty.PartitionRequestServerHandler.channelRead0(PartitionRequestServerHandler.java:130)
  at org.apache.flink.runtime.io.network.netty.PartitionRequestServerHandler.channelRead0(PartitionRequestServerHandler.java:42)
  at org.apache.flink.shaded.netty4.io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
  ... 19 more
Caused by: java.lang.Exception: java.lang.NullPointerException
  at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.checkThrowSourceExecutionException(SourceStreamTask.java:217)
  at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.processInput(SourceStreamTask.java:133)
  at org.apache.flink.streaming.runtime.tasks.StreamTask.run(StreamTask.java:301)
  at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:406)
  at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:705)
  at org.apache.flink.runtime.taskmanager.Task.run(Task.java:530)
  ... 1 more
Caused by: java.lang.NullPointerException

初步怀疑是因为Jar包冲突，因为要用的这个SimpleChannelInboundHandler类中没有 105行