cloud-fan commented on a change in pull request #24533: [SPARK-27637][Shuffle]
For nettyBlockTransferService, if IOException occurred while fetching data,
check whether relative executor is alive before retry
URL: https://github.com/apache/spark/pull/24533#discussion_r285106531
##########
File path:
core/src/test/scala/org/apache/spark/network/netty/NettyBlockTransferServiceSuite.scala
##########
@@ -77,6 +85,51 @@ class NettyBlockTransferServiceSuite
verifyServicePort(expectedPort = service0.port + 1, actualPort =
service1.port)
}
+ test("SPARK-27637: test fetch block with executor dead") {
+ implicit val exectionContext = ExecutionContext.global
+ val port = 17634 + Random.nextInt(10000)
+ logInfo("random port for test: " + port)
+
+ val driverEndpointRef = new RpcEndpointRef(new SparkConf()) {
+ override def address: RpcAddress = null
+ override def name: String = "test"
+ override def send(message: Any): Unit = {}
+ // This rpcEndPointRef always return false for unit test to touch
ExecutorDeadException.
+ override def ask[T: ClassTag](message: Any, timeout: RpcTimeout):
Future[T] = {
+ Future{false.asInstanceOf[T]}
+ }
+ }
+
+ val clientFactory = mock(classOf[TransportClientFactory])
+ val client = mock(classOf[TransportClient])
+ // This is used to touch an IOException during fetching block.
+ when(client.sendRpc(any(), any())).thenAnswer(_ => {throw new
IOException()})
+ var createClientCount = 0
+ when(clientFactory.createClient(any(), any())).thenAnswer(_ => {
+ createClientCount += 1
+ client
+ })
+
+ val listener = mock(classOf[BlockFetchingListener])
+ // This is used to throw a ExecutorDeadException for unit test, when the
fetch is failed
+ // because of ExecutorDeadException.
+ when(listener.onBlockFetchFailure(any(),
any(classOf[ExecutorDeadException])))
+ .thenAnswer(_ => {throw new ExecutorDeadException("Executor is dead.")})
Review comment:
nit:
```
var hitExecutorDeadException = false
when(listener.onBlockFetchFailure(any(),
any(classOf[ExecutorDeadException])))
.thenAnswer(_ => {hitExecutorDeadException = true})
...
service0.fetchBlocks...
assert(createClientCount === 1)
assert(hitExecutorDeadException)
```
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