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https://issues.apache.org/jira/browse/FLINK-8721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16410005#comment-16410005
]
ASF GitHub Bot commented on FLINK-8721:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/5737#discussion_r176515453
--- Diff:
flink-core/src/main/java/org/apache/flink/util/OptionalFailure.java ---
@@ -0,0 +1,112 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.util;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.annotation.Nullable;
+
+import java.io.Serializable;
+import java.util.Objects;
+import java.util.function.Supplier;
+
+import static org.apache.flink.util.Preconditions.checkNotNull;
+
+/**
+ * Wrapper around an object representing either a success (with a given
value) or a failure cause.
+ */
+public class OptionalFailure<T> implements Serializable {
+ private static final long serialVersionUID = 1L;
+
+ private static final Logger LOG =
LoggerFactory.getLogger(OptionalFailure.class);
+
+ @Nullable
+ private T value;
+
+ @Nullable
+ private Throwable failureCause;
+
+ private OptionalFailure(@Nullable T value, @Nullable Throwable
failureCause) {
+ this.value = value;
+ this.failureCause = failureCause;
+ }
+
+ public static <T> OptionalFailure<T> of(T value) {
+ return new OptionalFailure<>(value, null);
+ }
+
+ public static <T> OptionalFailure<T> ofFailure(Throwable failureCause) {
+ return new OptionalFailure<>(null, failureCause);
+ }
+
+ /**
+ * @return wrapped {@link OptionalFailure} returned by {@code
valueSupplier} or wrapped failure if
+ * {@code valueSupplier} has thrown a {@link RuntimeException}.
+ */
+ public static <T> OptionalFailure<T> createFrom(Supplier<T>
valueSupplier) {
+ try {
+ return OptionalFailure.of(valueSupplier.get());
+ }
+ catch (RuntimeException ex) {
+ LOG.error("Failed to archive accumulators", ex);
+ return OptionalFailure.ofFailure(ex);
+ }
+ }
+
+ /**
+ * @return stored value or throw a {@link FlinkRuntimeException} with
{@code failureCause}.
+ */
+ public T get() throws FlinkRuntimeException {
--- End diff --
I think `get` should throw a checked exception and not an unchecked
exception. Otherwise users won't be aware of it. We could provide a method
`getUnchecked` where we throw an unchecked exception.
> Client blocks indefinitely if job archiving fails
> -------------------------------------------------
>
> Key: FLINK-8721
> URL: https://issues.apache.org/jira/browse/FLINK-8721
> Project: Flink
> Issue Type: Improvement
> Components: Client, JobManager
> Affects Versions: 1.5.0
> Reporter: Chesnay Schepler
> Assignee: Piotr Nowojski
> Priority: Blocker
> Labels: flip-6
> Fix For: 1.5.0
>
>
> While porting the {{AccumulatorErrorITCase}} i noticed that, for FLIP-6, if
> the job archiving fails (in this case due to a custom accumulator throwing an
> exception in #merge) no response is sent to the client.
> {code}
> 3547 [flink-akka.actor.default-dispatcher-2] ERROR
> org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor - Caught exception
> while executing runnable in main thread.
> org.apache.flink.test.accumulators.AccumulatorErrorITCase$CustomException
> at
> org.apache.flink.test.accumulators.AccumulatorErrorITCase$FaultyAccumulator.clone(AccumulatorErrorITCase.java:113)
> at
> org.apache.flink.test.accumulators.AccumulatorErrorITCase$FaultyAccumulator.clone(AccumulatorErrorITCase.java:107)
> at
> org.apache.flink.api.common.accumulators.AccumulatorHelper.mergeInto(AccumulatorHelper.java:52)
> at
> org.apache.flink.runtime.executiongraph.ExecutionJobVertex.getAggregatedUserAccumulatorsStringified(ExecutionJobVertex.java:599)
> at
> org.apache.flink.runtime.executiongraph.ArchivedExecutionJobVertex.<init>(ArchivedExecutionJobVertex.java:49)
> at
> org.apache.flink.runtime.executiongraph.ExecutionJobVertex.archive(ExecutionJobVertex.java:612)
> at
> org.apache.flink.runtime.executiongraph.ArchivedExecutionGraph.createFrom(ArchivedExecutionGraph.java:313)
> at
> org.apache.flink.runtime.jobmaster.JobMaster.jobStatusChanged(JobMaster.java:985)
> at
> org.apache.flink.runtime.jobmaster.JobMaster.access$1400(JobMaster.java:136)
> at
> org.apache.flink.runtime.jobmaster.JobMaster$JobManagerJobStatusListener.lambda$jobStatusChanges$0(JobMaster.java:1181)
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleRunAsync(AkkaRpcActor.java:292)
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.handleMessage(AkkaRpcActor.java:147)
> at
> org.apache.flink.runtime.rpc.akka.FencedAkkaRpcActor.handleMessage(FencedAkkaRpcActor.java:66)
> at
> org.apache.flink.runtime.rpc.akka.AkkaRpcActor.lambda$onReceive$0(AkkaRpcActor.java:129)
> at
> akka.actor.ActorCell$$anonfun$become$1.applyOrElse(ActorCell.scala:544)
> at akka.actor.Actor$class.aroundReceive(Actor.scala:502)
> at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:95)
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
> at akka.actor.ActorCell.invoke(ActorCell.scala:495)
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
> at akka.dispatch.Mailbox.run(Mailbox.scala:224)
> at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
> at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> at
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> at
> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> {code}
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