[
https://issues.apache.org/jira/browse/FLINK-10309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16641836#comment-16641836
]
ASF GitHub Bot commented on FLINK-10309:
----------------------------------------
zentol commented on a change in pull request #6785: [FLINK-10309][rest] Before
shutting down cluster, wait for asynchronous operations
URL: https://github.com/apache/flink/pull/6785#discussion_r223364545
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/AbstractRestHandler.java
##########
@@ -75,19 +82,19 @@ protected AbstractRestHandler(
@Override
protected CompletableFuture<Void>
respondToRequest(ChannelHandlerContext ctx, HttpRequest httpRequest,
HandlerRequest<R, M> handlerRequest, T gateway) {
- CompletableFuture<P> response;
+ final CompletableFuture<P> response =
handleRequestInternal(handlerRequest, gateway);
- try {
- response = handleRequest(handlerRequest, gateway);
- } catch (RestHandlerException e) {
- response = FutureUtils.completedExceptionally(e);
- }
+ return response.whenCompleteAsync((P resp, Throwable throwable)
-> {
+ inFlightRequestTracker.deregisterRequest();
- return response.whenComplete((P resp, Throwable throwable) -> {
- Tuple2<ResponseBody, HttpResponseStatus> r = throwable
!= null ?
- errorResponse(throwable) : Tuple2.of(resp,
messageHeaders.getResponseStatusCode());
- HandlerUtils.sendResponse(ctx, httpRequest, r.f0, r.f1,
responseHeaders);
- }).thenApply(ignored -> null);
+ Tuple2<ResponseBody, HttpResponseStatus> r =
throwable != null ?
+ errorResponse(throwable) :
Tuple2.of(resp, messageHeaders.getResponseStatusCode());
+ HandlerUtils.sendResponse(ctx, httpRequest,
r.f0, r.f1, responseHeaders);
+ },
+ // send response from Netty's EventExecutor so that the
server channel
+ // does not close while we are responding to in-flight
requests
+ ctx.executor())
Review comment:
under what circumstances would the server channel close? Does it simply
close after a set or timeout or ...?
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> Cancel flink job occurs java.net.ConnectException
> -------------------------------------------------
>
> Key: FLINK-10309
> URL: https://issues.apache.org/jira/browse/FLINK-10309
> Project: Flink
> Issue Type: Bug
> Components: Distributed Coordination, REST
> Affects Versions: 1.5.3, 1.6.0, 1.7.0
> Reporter: vinoyang
> Assignee: Gary Yao
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.7.0, 1.6.2, 1.5.5
>
>
> The problem occurs when using the Yarn per-job detached mode. Trying to
> cancel with savepoint fails with the following exception before being able to
> retrieve the savepoint path:
> exception stack trace :
> {code:java}
> org.apache.flink.util.FlinkException: Could not cancel job xxxx.
> at
> org.apache.flink.client.cli.CliFrontend.lambda$cancel$4(CliFrontend.java:585)
> at
> org.apache.flink.client.cli.CliFrontend.runClusterAction(CliFrontend.java:960)
> at
> org.apache.flink.client.cli.CliFrontend.cancel(CliFrontend.java:577)
> at
> org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1034)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.util.concurrent.ExecutionException:
> org.apache.flink.runtime.concurrent.FutureUtils$RetryException: Could not
> complete the operation. Number of retries has been exhausted.
> at
> java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
> at
> java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
> at
> org.apache.flink.client.program.rest.RestClusterClient.cancelWithSavepoint(RestClusterClient.java:398)
> at
> org.apache.flink.client.cli.CliFrontend.lambda$cancel$4(CliFrontend.java:583)
> ... 6 more
> Caused by: org.apache.flink.runtime.concurrent.FutureUtils$RetryException:
> Could not complete the operation. Number of retries has been exhausted.
> at
> org.apache.flink.runtime.concurrent.FutureUtils.lambda$retryOperationWithDelay$5(FutureUtils.java:213)
> at
> java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760)
> at
> java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736)
> at
> java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
> at
> java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
> at
> org.apache.flink.runtime.rest.RestClient.lambda$submitRequest$1(RestClient.java:274)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:680)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:603)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:563)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:424)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:268)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:284)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
> at
> org.apache.flink.shaded.netty4.io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
> ... 1 more
> Caused by: java.util.concurrent.CompletionException:
> java.net.ConnectException: Connect refuse: xxx/xxx.xxx.xxx.xxx:xxx
> at
> java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
> at
> java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
> at
> java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:943)
> at
> java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
> ... 16 more
> Caused by: java.net.ConnectException: Connect refuse: xxx/xxx.xxx.xxx.xxx:xxx
> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> at
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:224)
> at
> org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:281)
> ... 7 more
> {code}
> some discussion in mailing list :
> http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/Cancel-flink-job-occur-exception-td24056.html
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