[
https://issues.apache.org/jira/browse/SPARK-21455?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xianyang Liu updated SPARK-21455:
---------------------------------
Description:
Currently, when there is a `RpcFailure` need be sent back to client, we call
`RpcCallContext.sendFailure`, then it will call `NettyRpcCallContext.send`.
However, we can see the follow code snippets in the implementation class.
```scala
private[netty] class RemoteNettyRpcCallContext(
nettyEnv: NettyRpcEnv,
callback: RpcResponseCallback,
senderAddress: RpcAddress)
extends NettyRpcCallContext(senderAddress) {
override protected def send(message: Any): Unit = {
val reply = nettyEnv.serialize(message)
callback.onSuccess(reply)
}
}
```
This is unreasonable, there are two reasons:
# Send back failure message by `RpcResponseCallback.onSuccess`, we can get
the details exception messages(such as `StackTrace`) in currently implements.
# `RpcResponseCallback.onSuccess` and `RpcResponseCallback.onFailure` could
have different behavior. Such as:
NettyBlockTransferService#uploadBlock
```scala
new RpcResponseCallback {
override def onSuccess(response: ByteBuffer): Unit = {
logTrace(s"Successfully uploaded block $blockId")
result.success((): Unit)
}
override def onFailure(e: Throwable): Unit = {
logError(s"Error while uploading block $blockId", e)
result.failure(e)
}
}
```
was:
Currently, when there is a `RpcFailure` need be sent back to client, we call
`RpcCallContext.sendFailure`, then it will call `NettyRpcCallContext.send`.
However, we can see the follow code snippets in the implementation class.
```scala
private[netty] class RemoteNettyRpcCallContext(
nettyEnv: NettyRpcEnv,
callback: RpcResponseCallback,
senderAddress: RpcAddress)
extends NettyRpcCallContext(senderAddress) {
override protected def send(message: Any): Unit = {
val reply = nettyEnv.serialize(message)
callback.onSuccess(reply)
}
}
```
This is unreasonable, there are two reasons:
# Send back failure message by `RpcResponseCallback.onSuccess`, we can get
the details exception messages(such as `StackTrace`) in currently implements.
# `RpcResponseCallback.onSuccess` and `RpcResponseCallback.onFailure` could
have different behavior. Such as:
NettyBlockTransferService#uploadBlock
```scala
new RpcResponseCallback {
override def onSuccess(response: ByteBuffer): Unit = {
logTrace(s"Successfully uploaded block $blockId")
result.success((): Unit)
}
override def onFailure(e: Throwable): Unit = {
logError(s"Error while uploading block $blockId", e)
result.failure(e)
}
}
```
> RpcFailure should be call on RpcResponseCallback.onFailure
> ----------------------------------------------------------
>
> Key: SPARK-21455
> URL: https://issues.apache.org/jira/browse/SPARK-21455
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.2.0
> Reporter: Xianyang Liu
>
> Currently, when there is a `RpcFailure` need be sent back to client, we call
> `RpcCallContext.sendFailure`, then it will call `NettyRpcCallContext.send`.
> However, we can see the follow code snippets in the implementation class.
> ```scala
> private[netty] class RemoteNettyRpcCallContext(
> nettyEnv: NettyRpcEnv,
> callback: RpcResponseCallback,
> senderAddress: RpcAddress)
> extends NettyRpcCallContext(senderAddress) {
> override protected def send(message: Any): Unit = {
> val reply = nettyEnv.serialize(message)
> callback.onSuccess(reply)
> }
> }
> ```
> This is unreasonable, there are two reasons:
> # Send back failure message by `RpcResponseCallback.onSuccess`, we can get
> the details exception messages(such as `StackTrace`) in currently implements.
> # `RpcResponseCallback.onSuccess` and `RpcResponseCallback.onFailure` could
> have different behavior. Such as:
> NettyBlockTransferService#uploadBlock
> ```scala
> new RpcResponseCallback {
> override def onSuccess(response: ByteBuffer): Unit = {
> logTrace(s"Successfully uploaded block $blockId")
> result.success((): Unit)
> }
> override def onFailure(e: Throwable): Unit = {
> logError(s"Error while uploading block $blockId", e)
> result.failure(e)
> }
> }
> ```
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