Repository: spark
Updated Branches:
refs/heads/master 42d225f44 -> 7bb6d31cf
[SPARK-11232][CORE] Use 'offer' instead of 'put' to make sure calling send
won't be interrupted
The current `NettyRpcEndpointRef.send` can be interrupted because it uses
`LinkedBlockingQueue.put`, which may hang the application.
Image the following execution order:
| thread 1: TaskRunner.kill | thread 2: TaskRunner.run
------------- | ------------- | -------------
1 | killed = true |
2 | | if (killed) {
3 | | throw new TaskKilledException
4 | | case _: TaskKilledException _: InterruptedException if task.killed =>
5 | task.kill(interruptThread): interruptThread is true |
6 | | execBackend.statusUpdate(taskId, TaskState.KILLED,
ser.serialize(TaskKilled))
7 | | localEndpoint.send(StatusUpdate(taskId, state, serializedData)): in
LocalBackend
Then `localEndpoint.send(StatusUpdate(taskId, state, serializedData))` will
throw `InterruptedException`. This will prevent the executor from updating the
task status and hang the application.
An failure caused by the above issue here:
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44062/consoleFull
Since `receivers` is an unbounded `LinkedBlockingQueue`, we can just use
`LinkedBlockingQueue.offer` to resolve this issue.
Author: zsxwing <zsxw...@gmail.com>
Closes #9198 from zsxwing/dont-interrupt-send.
Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/7bb6d31c
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/7bb6d31c
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/7bb6d31c
Branch: refs/heads/master
Commit: 7bb6d31cff279776f90744407291682774cfe1c2
Parents: 42d225f
Author: zsxwing <zsxw...@gmail.com>
Authored: Thu Oct 22 11:31:47 2015 -0700
Committer: Marcelo Vanzin <van...@cloudera.com>
Committed: Thu Oct 22 11:31:47 2015 -0700
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.../scala/org/apache/spark/rpc/netty/Dispatcher.scala | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
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http://git-wip-us.apache.org/repos/asf/spark/blob/7bb6d31c/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
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diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
index f1a8273..7bf44a6 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
@@ -66,7 +66,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv)
extends Logging {
}
val data = endpoints.get(name)
endpointRefs.put(data.endpoint, data.ref)
- receivers.put(data) // for the OnStart message
+ receivers.offer(data) // for the OnStart message
}
endpointRef
}
@@ -80,7 +80,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv)
extends Logging {
val data = endpoints.remove(name)
if (data != null) {
data.inbox.stop()
- receivers.put(data) // for the OnStop message
+ receivers.offer(data) // for the OnStop message
}
// Don't clean `endpointRefs` here because it's possible that some
messages are being processed
// now and they can use `getRpcEndpointRef`. So `endpointRefs` will be
cleaned in Inbox via
@@ -163,7 +163,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv)
extends Logging {
true
} else {
data.inbox.post(createMessageFn(data.ref))
- receivers.put(data)
+ receivers.offer(data)
false
}
}
@@ -183,7 +183,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv)
extends Logging {
// Stop all endpoints. This will queue all endpoints for processing by the
message loops.
endpoints.keySet().asScala.foreach(unregisterRpcEndpoint)
// Enqueue a message that tells the message loops to stop.
- receivers.put(PoisonPill)
+ receivers.offer(PoisonPill)
threadpool.shutdown()
}
@@ -218,7 +218,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv)
extends Logging {
val data = receivers.take()
if (data == PoisonPill) {
// Put PoisonPill back so that other MessageLoops can see it.
- receivers.put(PoisonPill)
+ receivers.offer(PoisonPill)
return
}
data.inbox.process(Dispatcher.this)
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