sarutak opened a new pull request #29049:
URL: https://github.com/apache/spark/pull/29049
### What changes were proposed in this pull request?
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This PR introduced a new internal configuration property
`spark.localCluster.shutdown.wait.timeoutMs` to shutdown local cluster
gracefully.
### Why are the changes needed?
<!--
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1. If you propose a new API, clarify the use case for a new API.
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Almost every time we call `sc.stop` with local cluster mode, like following
exceptions will be thrown.
```
20/07/09 08:36:45 ERROR TransportRequestHandler: Error while invoking
RpcHandler#receive() for one-way message.
org.apache.spark.rpc.RpcEnvStoppedException: RpcEnv already stopped.
at
org.apache.spark.rpc.netty.Dispatcher.postMessage(Dispatcher.scala:167)
at
org.apache.spark.rpc.netty.Dispatcher.postOneWayMessage(Dispatcher.scala:150)
at
org.apache.spark.rpc.netty.NettyRpcHandler.receive(NettyRpcEnv.scala:691)
at
org.apache.spark.network.server.TransportRequestHandler.processOneWayMessage(TransportRequestHandler.java:253)
at
org.apache.spark.network.server.TransportRequestHandler.handle(TransportRequestHandler.java:111)
at
org.apache.spark.network.server.TransportChannelHandler.channelRead0(TransportChannelHandler.java:140)
at
org.apache.spark.network.server.TransportChannelHandler.channelRead0(TransportChannelHandler.java:53)
at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
org.apache.spark.network.util.TransportFrameDecoder.channelRead(TransportFrameDecoder.java:102)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
at
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
```
It's confusable for users so I think it's better to fix.
The reason is the asynchronously sent RPC message KillExecutor from Master
can be processed after the message loop stops in Worker.
### Does this PR introduce _any_ user-facing change?
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the documentation fix.
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No.
### How was this patch tested?
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Before applying this change, we can almost always reproduce the issue with
the following command.
```
$ bin/spark-shell --master "local-cluster[10, 1, 1024]"
scala> :q
```
I confirmed no more exception thrown after this change with the same command
shown above.
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