[jira] [Created] (FLINK-24242) KafkaSinkITCase.testAbortTransactionsOfPendingCheckpointsAfterFailure fails due to NoSuchFileException
Xintong Song created FLINK-24242:
Summary:
KafkaSinkITCase.testAbortTransactionsOfPendingCheckpointsAfterFailure fails due
to NoSuchFileException
Key: FLINK-24242
URL: https://issues.apache.org/jira/browse/FLINK-24242
Project: Flink
Issue Type: Bug
Components: Connectors / Kafka
Affects Versions: 1.15.0
Reporter: Xintong Song
Fix For: 1.15.0
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=23876&view=logs&j=72d4811f-9f0d-5fd0-014a-0bc26b72b642&t=e424005a-b16e-540f-196d-da062cc19bdf&l=7335
{code}
Sep 10 00:06:17 [ERROR] Tests run: 8, Failures: 0, Errors: 1, Skipped: 0, Time
elapsed: 79.401 s <<< FAILURE! - in
org.apache.flink.connector.kafka.sink.KafkaSinkITCase
Sep 10 00:06:17 [ERROR] testAbortTransactionsOfPendingCheckpointsAfterFailure
Time elapsed: 2.358 s <<< ERROR!
Sep 10 00:06:17 java.io.UncheckedIOException:
java.nio.file.NoSuchFileException:
/tmp/junit7927515964136749979/junit1325061264264479088/9554f057606834081bc37f12e8f298f5/chk-2
Sep 10 00:06:17 at
java.nio.file.FileTreeIterator.fetchNextIfNeeded(FileTreeIterator.java:88)
Sep 10 00:06:17 at
java.nio.file.FileTreeIterator.hasNext(FileTreeIterator.java:104)
Sep 10 00:06:17 at
java.util.Iterator.forEachRemaining(Iterator.java:115)
Sep 10 00:06:17 at
java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
Sep 10 00:06:17 at
java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
Sep 10 00:06:17 at
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
Sep 10 00:06:17 at
java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
Sep 10 00:06:17 at
java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
Sep 10 00:06:17 at
java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:546)
Sep 10 00:06:17 at
java.util.stream.ReferencePipeline.max(ReferencePipeline.java:582)
Sep 10 00:06:17 at
org.apache.flink.test.util.TestUtils.getMostRecentCompletedCheckpoint(TestUtils.java:99)
Sep 10 00:06:17 at
org.apache.flink.connector.kafka.sink.KafkaSinkITCase.testAbortTransactionsOfPendingCheckpointsAfterFailure(KafkaSinkITCase.java:247)
{code}
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[jira] [Created] (FLINK-24241) test_table_environment_api.py fail with NPE
Xintong Song created FLINK-24241:
Summary: test_table_environment_api.py fail with NPE
Key: FLINK-24241
URL: https://issues.apache.org/jira/browse/FLINK-24241
Project: Flink
Issue Type: Bug
Components: API / Python
Affects Versions: 1.15.0
Reporter: Xintong Song
Fix For: 1.15.0
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=23876&view=logs&j=821b528f-1eed-5598-a3b4-7f748b13f261&t=6bb545dd-772d-5d8c-f258-f5085fba3295&l=23263
{code}
Sep 10 03:03:39 E py4j.protocol.Py4JJavaError: An error
occurred while calling o16211.execute.
Sep 10 03:03:39 E : java.lang.NullPointerException
Sep 10 03:03:39 E at
java.util.Objects.requireNonNull(Objects.java:203)
Sep 10 03:03:39 E at
org.apache.calcite.rel.metadata.RelMetadataQuery.(RelMetadataQuery.java:144)
Sep 10 03:03:39 E at
org.apache.calcite.rel.metadata.RelMetadataQuery.(RelMetadataQuery.java:108)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.metadata.FlinkRelMetadataQuery.(FlinkRelMetadataQuery.java:78)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.metadata.FlinkRelMetadataQuery.instance(FlinkRelMetadataQuery.java:59)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.calcite.FlinkRelOptClusterFactory$$anon$1.get(FlinkRelOptClusterFactory.scala:39)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.calcite.FlinkRelOptClusterFactory$$anon$1.get(FlinkRelOptClusterFactory.scala:38)
Sep 10 03:03:39 E at
org.apache.calcite.plan.RelOptCluster.getMetadataQuery(RelOptCluster.java:178)
Sep 10 03:03:39 E at
org.apache.calcite.rel.metadata.RelMdUtil.clearCache(RelMdUtil.java:965)
Sep 10 03:03:39 E at
org.apache.calcite.plan.hep.HepPlanner.buildFinalPlan(HepPlanner.java:942)
Sep 10 03:03:39 E at
org.apache.calcite.plan.hep.HepPlanner.buildFinalPlan(HepPlanner.java:939)
Sep 10 03:03:39 E at
org.apache.calcite.plan.hep.HepPlanner.findBestExp(HepPlanner.java:194)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.optimize.program.FlinkHepProgram.optimize(FlinkHepProgram.scala:69)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.optimize.program.FlinkHepRuleSetProgram.optimize(FlinkHepRuleSetProgram.scala:87)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram$$anonfun$optimize$1$$anonfun$apply$1.apply(FlinkGroupProgram.scala:63)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram$$anonfun$optimize$1$$anonfun$apply$1.apply(FlinkGroupProgram.scala:60)
Sep 10 03:03:39 E at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
Sep 10 03:03:39 E at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
Sep 10 03:03:39 E at
scala.collection.Iterator$class.foreach(Iterator.scala:891)
Sep 10 03:03:39 E at
scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
Sep 10 03:03:39 E at
scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
Sep 10 03:03:39 E at
scala.collection.AbstractIterable.foreach(Iterable.scala:54)
Sep 10 03:03:39 E at
scala.collection.TraversableOnce$class.foldLeft(TraversableOnce.scala:157)
Sep 10 03:03:39 E at
scala.collection.AbstractTraversable.foldLeft(Traversable.scala:104)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram$$anonfun$optimize$1.apply(FlinkGroupProgram.scala:60)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram$$anonfun$optimize$1.apply(FlinkGroupProgram.scala:55)
Sep 10 03:03:39 E at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
Sep 10 03:03:39 E at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
Sep 10 03:03:39 E at
scala.collection.immutable.Range.foreach(Range.scala:160)
Sep 10 03:03:39 E at
scala.collection.TraversableOnce$class.foldLeft(TraversableOnce.scala:157)
Sep 10 03:03:39 E at
scala.collection.AbstractTraversable.foldLeft(Traversable.scala:104)
Sep 10 03:03:39 E at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram.optimize(FlinkGroupP
[jira] [Created] (FLINK-24240) HA JobGraph deserialization problem when migrate 1.12.4 to 1.13.2
Zheren Yu created FLINK-24240: - Summary: HA JobGraph deserialization problem when migrate 1.12.4 to 1.13.2 Key: FLINK-24240 URL: https://issues.apache.org/jira/browse/FLINK-24240 Project: Flink Issue Type: Bug Components: Runtime / State Backends Affects Versions: 1.13.2 Reporter: Zheren Yu We are using HA with flink on k8s, which will create the configmap like `xxx-dispatcher-leader`, and put jobGraph inside it, once we update version from 1.12.4 to 1.13.2 without stopping the job, the jobGraph create from old version will be deserialized and lacking of the filed of jobType, which cause the below problem ``` Caused by: java.lang.NullPointerException at org.apache.flink.runtime.deployment.TaskDeploymentDescriptorFactory$PartitionLocationConstraint.fromJobType(TaskDeploymentDescriptorFactory.java:282) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.scheduler.SchedulerBase.createAndRestoreExecutionGraph(SchedulerBase.java:347) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.scheduler.SchedulerBase.(SchedulerBase.java:190) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.scheduler.DefaultScheduler.(DefaultScheduler.java:122) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.scheduler.DefaultSchedulerFactory.createInstance(DefaultSchedulerFactory.java:132) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.jobmaster.DefaultSlotPoolServiceSchedulerFactory.createScheduler(DefaultSlotPoolServiceSchedulerFactory.java:110) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.jobmaster.JobMaster.createScheduler(JobMaster.java:340) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.jobmaster.JobMaster.(JobMaster.java:317) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.jobmaster.factories.DefaultJobMasterServiceFactory.internalCreateJobMasterService(DefaultJobMasterServiceFactory.java:107) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.runtime.jobmaster.factories.DefaultJobMasterServiceFactory.lambda$createJobMasterService$0(DefaultJobMasterServiceFactory.java:95) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at org.apache.flink.util.function.FunctionUtils.lambda$uncheckedSupplier$4(FunctionUtils.java:112) ~[flink-dist_2.12-1.13.2.jar:1.13.2] at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604) ~[?:1.8.0_302] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_302] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_302] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) ~[?:1.8.0_302] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) ~[?:1.8.0_302] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_302] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_302] at java.lang.Thread.run(Thread.java:748) ``` I just wandering do we have any workaround with this? (although I know manually stopping the job may work) -- This message was sent by Atlassian Jira (v8.3.4#803005)
Re: [ANNOUNCE] Documentation now available at nightlies.apache.org
To me its is not any less official sounding than "ci.apache.org". flink.apache.org content is served directly from Git; we would have to commit the compiled content to the flink-web repository. This would require changes to our current workflow and would likely reduce the power of our current approach in the process, i.e., making some change in flink no longer automatically deploys the docs, you'd have to add them manually to flink-web, and then we're pretty much only gonna do it for releases. In short, that's not something we can change quickly. On 10/09/2021 06:41, Jark Wu wrote: Thanks Chesnay for the migration work, However, I think the domain name "nightlies.apache.org" does not sound like an official address, and the current documentation URL is a bit long https://nightlies.apache.org/flink/flink-docs-release-1.14/. Is it possible to migrate to https://flink.apache.org/ ? e.g. with a short link https://flink.apache.org/docs/1.14/ which sounds more official and easier to remember. Maybe it's also a good chance to announce a new domain. Best, Jark On Fri, 10 Sept 2021 at 11:23, Leonard Xu wrote: Thanks Chesnay for the migration work. Should we add a redirection for the old documentation site: https://ci.apache.org/flink/flink-docs-master/ to make it redirect to the new one: https://nightlies.apache.org/flink/flink-docs-master/ ? The bookmark in users’ browser should still be the old one, I googled "flink documents" which also returned the old one. And the old one won’t be updated and would be outdated soon. Best, Leonard 在 2021年9月6日，17:11，Chesnay Schepler 写道： Website has been updated to point to nightlies.apache.org as well. On 03/09/2021 08:03, Chesnay Schepler wrote: The migration is pretty much complete and the documentation is now available at nightlies.apache.org . Please click around a bit and check if anything is broken. If no issues are reported by the end of today I will update the links on the website. On 01/09/2021 10:11, Chesnay Schepler wrote: We are in the final steps of migrating the documentation to the new buildbot setup. Because of that the documentation currently available at ci.apache.org will NOT be updated until further notice because the old builders have been deactivated while we iron out kinks in the new ones. I will keep you updated on the progress.
Re: [ANNOUNCE] Documentation now available at nightlies.apache.org
A redirection will be setup by infra at some point. On 10/09/2021 05:23, Leonard Xu wrote: Thanks Chesnay for the migration work. Should we add a redirection for the old documentation site: https://ci.apache.org/flink/flink-docs-master/ to make it redirect to the new one: https://nightlies.apache.org/flink/flink-docs-master/ ? The bookmark in users’ browser should still be the old one, I googled "flink documents" which also returned the old one. And the old one won’t be updated and would be outdated soon. Best, Leonard 在 2021年9月6日，17:11，Chesnay Schepler 写道： Website has been updated to point to nightlies.apache.org as well. On 03/09/2021 08:03, Chesnay Schepler wrote: The migration is pretty much complete and the documentation is now available at nightlies.apache.org . Please click around a bit and check if anything is broken. If no issues are reported by the end of today I will update the links on the website. On 01/09/2021 10:11, Chesnay Schepler wrote: We are in the final steps of migrating the documentation to the new buildbot setup. Because of that the documentation currently available at ci.apache.org will NOT be updated until further notice because the old builders have been deactivated while we iron out kinks in the new ones. I will keep you updated on the progress.
[jira] [Created] (FLINK-24239) Event time temporal join should support values from array, map, row, etc. as join key
Caizhi Weng created FLINK-24239:
---
Summary: Event time temporal join should support values from
array, map, row, etc. as join key
Key: FLINK-24239
URL: https://issues.apache.org/jira/browse/FLINK-24239
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Affects Versions: 1.12.6, 1.13.3, 1.15.0, 1.14.1
Reporter: Caizhi Weng
This ticket is from the [mailing
list|https://lists.apache.org/thread.html/r90cab9c5026e527357d58db70d7e9b5875e57b942738f032bd54bfd3%40%3Cuser-zh.flink.apache.org%3E].
Currently in event time temporal join when join keys are from an array, map or
row, an exception will be thrown saying "Currently the join key in Temporal
Table Join can not be empty". This is quite confusing for users as they've
already set the join keys.
Add the following test case to {{TableEnvironmentITCase}} to reproduce this
issue.
{code:scala}
@Test
def myTest(): Unit = {
tEnv.executeSql(
"""
|CREATE TABLE A (
| a MAP,
| ts TIMESTAMP(3),
| WATERMARK FOR ts AS ts
|) WITH (
| 'connector' = 'values'
|)
|""".stripMargin)
tEnv.executeSql(
"""
|CREATE TABLE B (
| id INT,
| ts TIMESTAMP(3),
| WATERMARK FOR ts AS ts
|) WITH (
| 'connector' = 'values'
|)
|""".stripMargin)
tEnv.executeSql("SELECT * FROM A LEFT JOIN B FOR SYSTEM_TIME AS OF A.ts AS b
ON A.a['ID'] = id").print()
}
{code}
The exception stack is
{code:java}
org.apache.flink.table.api.ValidationException: Currently the join key in
Temporal Table Join can not be empty.
at
org.apache.flink.table.planner.plan.rules.logical.LogicalCorrelateToJoinFromGeneralTemporalTableRule.onMatch(LogicalCorrelateToJoinFromTemporalTableRule.scala:272)
at
org.apache.calcite.plan.AbstractRelOptPlanner.fireRule(AbstractRelOptPlanner.java:333)
at org.apache.calcite.plan.hep.HepPlanner.applyRule(HepPlanner.java:542)
at
org.apache.calcite.plan.hep.HepPlanner.applyRules(HepPlanner.java:407)
at
org.apache.calcite.plan.hep.HepPlanner.executeInstruction(HepPlanner.java:243)
at
org.apache.calcite.plan.hep.HepInstruction$RuleInstance.execute(HepInstruction.java:127)
at
org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:202)
at
org.apache.calcite.plan.hep.HepPlanner.findBestExp(HepPlanner.java:189)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkHepProgram.optimize(FlinkHepProgram.scala:69)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkHepRuleSetProgram.optimize(FlinkHepRuleSetProgram.scala:87)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram$$anonfun$optimize$1$$anonfun$apply$1.apply(FlinkGroupProgram.scala:63)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram$$anonfun$optimize$1$$anonfun$apply$1.apply(FlinkGroupProgram.scala:60)
at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
at scala.collection.Iterator$class.foreach(Iterator.scala:891)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at
scala.collection.TraversableOnce$class.foldLeft(TraversableOnce.scala:157)
at scala.collection.AbstractTraversable.foldLeft(Traversable.scala:104)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram$$anonfun$optimize$1.apply(FlinkGroupProgram.scala:60)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram$$anonfun$optimize$1.apply(FlinkGroupProgram.scala:55)
at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
at scala.collection.immutable.Range.foreach(Range.scala:160)
at
scala.collection.TraversableOnce$class.foldLeft(TraversableOnce.scala:157)
at scala.collection.AbstractTraversable.foldLeft(Traversable.scala:104)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram.optimize(FlinkGroupProgram.scala:55)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkChainedProgram$$anonfun$optimize$1.apply(FlinkChainedProgram.scala:62)
at
org.apache.flink.table.planner.plan.optimize.program.FlinkChainedProgram$$anonfun$optimize$1.apply(FlinkChainedProgram.scala:58)
at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:157)
at
scala.collection.TraversableOnce$$anonfun$foldLeft$1.
Re: [ANNOUNCE] Documentation now available at nightlies.apache.org
Thanks Chesnay for the migration work, However, I think the domain name "nightlies.apache.org" does not sound like an official address, and the current documentation URL is a bit long https://nightlies.apache.org/flink/flink-docs-release-1.14/. Is it possible to migrate to https://flink.apache.org/ ? e.g. with a short link https://flink.apache.org/docs/1.14/ which sounds more official and easier to remember. Maybe it's also a good chance to announce a new domain. Best, Jark On Fri, 10 Sept 2021 at 11:23, Leonard Xu wrote: > Thanks Chesnay for the migration work. > > Should we add a redirection for the old documentation site: > https://ci.apache.org/flink/flink-docs-master/ to make > it redirect to the new one: > https://nightlies.apache.org/flink/flink-docs-master/ ? > > The bookmark in users’ browser should still be the old one, I googled > "flink documents" which also returned the old one. > And the old one won’t be updated and would be outdated soon. > > Best, > Leonard > > > 在 2021年9月6日，17:11，Chesnay Schepler 写道： > > > > Website has been updated to point to nightlies.apache.org as well. > > > > On 03/09/2021 08:03, Chesnay Schepler wrote: > >> The migration is pretty much complete and the documentation is now > available at nightlies.apache.org . > >> > >> Please click around a bit and check if anything is broken. > >> > >> If no issues are reported by the end of today I will update the links > on the website. > >> > >> On 01/09/2021 10:11, Chesnay Schepler wrote: > >>> We are in the final steps of migrating the documentation to the new > buildbot setup. > >>> > >>> Because of that the documentation currently available at ci.apache.org > will NOT be updated until further notice because the old builders have been > deactivated while we iron out kinks in the new ones. > >>> > >>> I will keep you updated on the progress. > >>> > >> > > > >
Re: [ANNOUNCE] Documentation now available at nightlies.apache.org
Thanks Chesnay for the migration work. Should we add a redirection for the old documentation site: https://ci.apache.org/flink/flink-docs-master/ to make it redirect to the new one: https://nightlies.apache.org/flink/flink-docs-master/ ? The bookmark in users’ browser should still be the old one, I googled "flink documents" which also returned the old one. And the old one won’t be updated and would be outdated soon. Best, Leonard > 在 2021年9月6日，17:11，Chesnay Schepler 写道： > > Website has been updated to point to nightlies.apache.org as well. > > On 03/09/2021 08:03, Chesnay Schepler wrote: >> The migration is pretty much complete and the documentation is now available >> at nightlies.apache.org . >> >> Please click around a bit and check if anything is broken. >> >> If no issues are reported by the end of today I will update the links on the >> website. >> >> On 01/09/2021 10:11, Chesnay Schepler wrote: >>> We are in the final steps of migrating the documentation to the new >>> buildbot setup. >>> >>> Because of that the documentation currently available at ci.apache.org will >>> NOT be updated until further notice because the old builders have been >>> deactivated while we iron out kinks in the new ones. >>> >>> I will keep you updated on the progress. >>> >> >
[VOTE] FLIP-173: Support DAG of algorithms
Hi all, We would like to start the vote for FLIP-173: Support DAG of algorithms [1]. This FLIP was discussed in this thread [2]. The proposal extended the Flink ML API to support DAG of algorithms where each algorithm could have multiple inputs and multiple outputs. It also extended Flink ML API to support online learning scenarios where a long-running Model instance needs to be continuously updated by the latest model data generated by another long-running Estimator instance. The vote will be open for at least 72 hours, following the consensus voting process. Thanks! Dong Lin and Zhipeng Zhang [1] https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=184615783 [2] https://lists.apache.org/thread.html/r6729f351fb1bc13a93754c199d5fee1051cc8146e22374737c578779%40%3Cdev.flink.apache.org%3E
[jira] [Created] (FLINK-24238) Page title missing
Jun Qin created FLINK-24238: --- Summary: Page title missing Key: FLINK-24238 URL: https://issues.apache.org/jira/browse/FLINK-24238 Project: Flink Issue Type: Bug Components: Documentation Affects Versions: 1.13.2 Reporter: Jun Qin the page title is missing on this Flink doc: [https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/dev/table/concepts/versioned_tables/]. [This one|https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/dev/table/concepts/dynamic_tables/] is a good example. -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Created] (FLINK-24237) Consider disabling or lowering DNS caching timeout in docker image
Chesnay Schepler created FLINK-24237: Summary: Consider disabling or lowering DNS caching timeout in docker image Key: FLINK-24237 URL: https://issues.apache.org/jira/browse/FLINK-24237 Project: Flink Issue Type: Improvement Components: Deployment / Kubernetes Reporter: Chesnay Schepler Fix For: 1.15.0 A recent [blog post|https://mux.com/blog/5-years-of-flink-at-mux/] by Mux mentions that they have disabled DNS caching in their docker image because without it the Flink processes had trouble talking to over services when deployments move between nodes: ??The JVM will cache DNS entries forever by default. This is undesirable in Kubernetes deployments where there’s an expectation that DNS entries can and do change frequently as pod deployments move between nodes. We’ve seen Flink applications suddenly unable to talk to other services in the cluster after pods are upgraded.?? We should investigate this, in particular whether it would make sense to set it to a low value instead of disabling it entirely. -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Created] (FLINK-24236) Migrate tests to reporter factories
Chesnay Schepler created FLINK-24236: Summary: Migrate tests to reporter factories Key: FLINK-24236 URL: https://issues.apache.org/jira/browse/FLINK-24236 Project: Flink Issue Type: Technical Debt Components: Runtime / Metrics, Tests Reporter: Chesnay Schepler Assignee: Chesnay Schepler Fix For: 1.15.0 In preparation for FLINK-24235, migrate tests to use factories where the instantiation path is not relevant (i.e., everything that is not the ReporterSetupTest). -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Created] (FLINK-24235) Restrict reporter support to plugins
Chesnay Schepler created FLINK-24235: Summary: Restrict reporter support to plugins Key: FLINK-24235 URL: https://issues.apache.org/jira/browse/FLINK-24235 Project: Flink Issue Type: Technical Debt Components: Runtime / Metrics Reporter: Chesnay Schepler Assignee: Chesnay Schepler Fix For: 1.15.0 Metric reporters can currently be instantiated in one of 2 ways: a) the reporter class is loaded via reflection b) the reporter factory is loaded via reflection/ServiceLoader (aka, plugins) All reporters provided by Flink use the factory approach, and it is preferable because it supports plugins. The plugin approach also has been available 1.11, and I think it's fair to remove the old approach by now. -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Created] (FLINK-24234) [FLIP-171] Byte Based & Time Based Flushing for AsyncSinkBase
Zichen Liu created FLINK-24234: -- Summary: [FLIP-171] Byte Based & Time Based Flushing for AsyncSinkBase Key: FLINK-24234 URL: https://issues.apache.org/jira/browse/FLINK-24234 Project: Flink Issue Type: New Feature Components: Connectors / Common Reporter: Zichen Liu Assignee: Zichen Liu Fix For: 1.15.0 h2. Motivation Apache Flink has a rich connector ecosystem that can persist data in various destinations. Flink natively supports Apache Kafka, Amazon Kinesis Data Streams, Elasticsearch, HBase, and many more destinations. Additional connectors are maintained in Apache Bahir or directly on GitHub. The basic functionality of these sinks is quite similar. They batch events according to user defined buffering hints, sign requests and send them to the respective endpoint, retry unsuccessful or throttled requests, and participate in checkpointing. They primarily just differ in the way they interface with the destination. Yet, all the above-mentioned sinks are developed and maintained independently. We hence propose to create a sink that abstracts away this common functionality into a generic sink. Adding support for a new destination then just means creating a lightweight shim that only implements the specific interfaces of the destination using a client that supports async requests. Having a common abstraction will reduce the effort required to maintain all these individual sinks. It will also make it much easier and faster to create integrations with additional destinations. Moreover, improvements or bug fixes to the core of the sink will benefit all implementations that are based on it. The design of the sink focusses on extensibility and a broad support of destinations. The core of the sink is kept generic and free of any connector specific dependencies. The sink is designed to participate in checkpointing to provide at-least once semantics, but it is limited to destinations that provide a client that supports async requests. h2. References More details to be found https://cwiki.apache.org/confluence/display/FLINK/FLIP-171%3A+Async+Sink -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Created] (FLINK-24233) Receiving new buffer size before network reader configured
Anton Kalashnikov created FLINK-24233:
-
Summary: Receiving new buffer size before network reader configured
Key: FLINK-24233
URL: https://issues.apache.org/jira/browse/FLINK-24233
Project: Flink
Issue Type: Bug
Components: Runtime / Network
Affects Versions: 1.14.0
Reporter: Anton Kalashnikov
Fix For: 1.14.1
{noformat}
2021-09-09 14:36:42,383 WARN org.apache.flink.runtime.taskmanager.Task
[] - Map -> Flat Map (71/75)#0 (7a5b971e0cd57aa5d057a114e2679b03)
switched from RUNNING to FAILED with failure c
ause:
org.apache.flink.runtime.io.network.netty.exception.RemoteTransportException:
Fatal error at remote task manager
'ip-172-31-22-183.eu-central-1.compute.internal/172.31.22.183:42085'.
at
org.apache.flink.runtime.io.network.netty.CreditBasedPartitionRequestClientHandler.decodeMsg(CreditBasedPartitionRequestClientHandler.java:339)
at
org.apache.flink.runtime.io.network.netty.CreditBasedPartitionRequestClientHandler.channelRead(CreditBasedPartitionRequestClientHandler.java:240)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
org.apache.flink.runtime.io.network.netty.NettyMessageClientDecoderDelegate.channelRead(NettyMessageClientDecoderDelegate.java:112)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at
org.apache.flink.shaded.netty4.io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795)
at
org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480)
at
org.apache.flink.shaded.netty4.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalStateException: No reader for receiverId =
296559f497c54a82534945f4549b9e2d exists.
at
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.obtainReader(PartitionRequestQueue.java:194)
at
org.apache.flink.runtime.io.network.netty.PartitionRequestQueue.notifyNewBufferSize(PartitionRequestQueue.java:188)
at
org.apache.flink.runtime.io.network.netty.PartitionRequestServerHandler.channelRead0(PartitionRequestServerHandler.java:134)
at
org.apache.flink.runtime.io.network.netty.PartitionRequestServerHandler.channelRead0(PartitionRequestServerHandler.java:42)
at
org.apache.flink.shaded.netty4.io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
at
org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:311)
at
org.apache.flink.shaded.netty4.io.net
[jira] [Created] (FLINK-24232) Archiving of suspended jobs prevents breaks subsequent archive attempts
Chesnay Schepler created FLINK-24232: Summary: Archiving of suspended jobs prevents breaks subsequent archive attempts Key: FLINK-24232 URL: https://issues.apache.org/jira/browse/FLINK-24232 Project: Flink Issue Type: Bug Components: Runtime / Coordination Affects Versions: 1.14.0 Reporter: Chesnay Schepler To archive a job we write a file that uses the job ID as the name. Since suspended jobs are handled like other terminal jobs they are also being archived. When that job then later resumes any attempt to archive the job on termination will fail because an archive already exists. The simplest option is to add a suffix if an archive already exists, like "_1". -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Created] (FLINK-24231) Buffer debloating microbenchmark for multiply gate
Anton Kalashnikov created FLINK-24231: - Summary: Buffer debloating microbenchmark for multiply gate Key: FLINK-24231 URL: https://issues.apache.org/jira/browse/FLINK-24231 Project: Flink Issue Type: Sub-task Components: Runtime / Network Affects Versions: 1.14.0 Reporter: Anton Kalashnikov Fix For: 1.15.0 It needs to expand the microbenchmark from https://issues.apache.org/jira/browse/FLINK-24230 with a scenario when different gates have: * different throughput * different record size -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Created] (FLINK-24230) Buffer debloating microbenchmark for single gate
Anton Kalashnikov created FLINK-24230: - Summary: Buffer debloating microbenchmark for single gate Key: FLINK-24230 URL: https://issues.apache.org/jira/browse/FLINK-24230 Project: Flink Issue Type: Sub-task Components: Runtime / Network Affects Versions: 1.14.0 Reporter: Anton Kalashnikov Fix For: 1.15.0 Currently, there are no microbenchmarks that check buffer debloating effectiveness. The idea is to create one which will measure the checkpoint time. The benchmark should be similar to `UnalignedCheckpointTimeBenchmark` but unlike the `UnalignedCheckpointTimeBenchmark` where we see the effect of `Buffer debloat` only for extremely small values like 1ms for BUFFER_DEBLOAT_TARGET. This benchmark should provide a more reliable way to check the different implementations of `Buffer debloat` it can be reached by increasing at least record size and checkpoint interval. The main target is to have how long will it take to do the checkpoint during backpressure when all buffers are full. -- This message was sent by Atlassian Jira (v8.3.4#803005)
[jira] [Created] (FLINK-24229) [FLIP-171] DynamoDB implementation of Async Sink
Zichen Liu created FLINK-24229:
--
Summary: [FLIP-171] DynamoDB implementation of Async Sink
Key: FLINK-24229
URL: https://issues.apache.org/jira/browse/FLINK-24229
Project: Flink
Issue Type: New Feature
Components: Connectors / Common
Reporter: Zichen Liu
Assignee: Zichen Liu
Fix For: 1.15.0
h2. Motivation
*User stories:*
As a Flink user, I’d like to use Kinesis Firehose as sink for my data pipeline.
*Scope:*
* Implement an asynchronous sink for Kinesis Firehose by inheriting the
AsyncSinkBase class. The implementation can for now reside in its own module in
flink-connectors. The module and package name can be anything reasonable e.g.
{{flink-connector-aws-kinesis}} for the module name and
{{org.apache.flink.connector.aws.kinesis}} for the package name.
* The implementation must use [the Kinesis Java
Client|https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/kinesis/AmazonKinesisClient.html].
* The implementation must allow users to configure the Kinesis Client, with
reasonable default settings.
* Implement an asynchornous sink writer for Firehose by extending the
AsyncSinkWriter. The implementation must deal with failed requests and retry
them using the {{requeueFailedRequestEntry}} method. If possible, the
implementation should batch multiple requests (PutRecordsRequestEntry objects)
to Firehose for increased throughput. The implemented Sink Writer will be used
by the Sink class that will be created as part of this story.
* Unit/Integration testing. Use Kinesalite (in-memory Kinesis simulation). We
already use this in {{KinesisTableApiITCase}}.
* Java / code-level docs.
* End to end testing: add tests that hits a real AWS instance. (How to best
donate resources to the Flink project to allow this to happen?)
h2. References
More details to be found
[https://cwiki.apache.org/confluence/display/FLINK/FLIP-171%3A+Async+Sink]
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[jira] [Created] (FLINK-24228) [FLIP-171] Firehose implementation of Async Sink
Zichen Liu created FLINK-24228:
--
Summary: [FLIP-171] Firehose implementation of Async Sink
Key: FLINK-24228
URL: https://issues.apache.org/jira/browse/FLINK-24228
Project: Flink
Issue Type: New Feature
Components: Connectors / Common
Reporter: Zichen Liu
Assignee: Zichen Liu
Fix For: 1.15.0
h2. Motivation
*User stories:*
As a Flink user, I’d like to use Kinesis Data Streams as sink for my data
pipeline.
*Scope:*
* Implement an asynchronous sink for Kinesis Data Streams (KDS) by inheriting
the AsyncSinkBase class. The implementation can for now reside in its own
module in flink-connectors. The module and package name can be anything
reasonable e.g. {{flink-connector-aws-kinesis}} for the module name and
{{org.apache.flink.connector.aws.kinesis}} for the package name.
* The implementation must use [the Kinesis Java
Client|https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/kinesis/AmazonKinesisClient.html].
* The implementation must allow users to configure the Kinesis Client, with
reasonable default settings.
* Implement an asynchornous sink writer for KDS by extending the
AsyncSinkWriter. The implementation must deal with failed requests and retry
them using the {{requeueFailedRequestEntry}} method. If possible, the
implementation should batch multiple requests (PutRecordsRequestEntry objects)
to KDS for increased throughput. The implemented Sink Writer will be used by
the Sink class that will be created as part of this story.
* Unit/Integration testing. Use Kinesalite (in-memory Kinesis simulation). We
already use this in {{KinesisTableApiITCase}}.
* Java / code-level docs.
* End to end testing: add tests that hits a real AWS instance. (How to best
donate resources to the Flink project to allow this to happen?)
h2. References
More details to be found
[https://cwiki.apache.org/confluence/display/FLINK/FLIP-171%3A+Async+Sink]
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[jira] [Created] (FLINK-24227) [FLIP-171] KDS implementation of Async Sink
Zichen Liu created FLINK-24227: -- Summary: [FLIP-171] KDS implementation of Async Sink Key: FLINK-24227 URL: https://issues.apache.org/jira/browse/FLINK-24227 Project: Flink Issue Type: New Feature Components: Connectors / Common Reporter: Zichen Liu Assignee: Zichen Liu Fix For: 1.15.0 h2. Motivation Apache Flink has a rich connector ecosystem that can persist data in various destinations. Flink natively supports Apache Kafka, Amazon Kinesis Data Streams, Elasticsearch, HBase, and many more destinations. Additional connectors are maintained in Apache Bahir or directly on GitHub. The basic functionality of these sinks is quite similar. They batch events according to user defined buffering hints, sign requests and send them to the respective endpoint, retry unsuccessful or throttled requests, and participate in checkpointing. They primarily just differ in the way they interface with the destination. Yet, all the above-mentioned sinks are developed and maintained independently. We hence propose to create a sink that abstracts away this common functionality into a generic sink. Adding support for a new destination then just means creating a lightweight shim that only implements the specific interfaces of the destination using a client that supports async requests. Having a common abstraction will reduce the effort required to maintain all these individual sinks. It will also make it much easier and faster to create integrations with additional destinations. Moreover, improvements or bug fixes to the core of the sink will benefit all implementations that are based on it. The design of the sink focusses on extensibility and a broad support of destinations. The core of the sink is kept generic and free of any connector specific dependencies. The sink is designed to participate in checkpointing to provide at-least once semantics, but it is limited to destinations that provide a client that supports async requests. h2. References More details to be found https://cwiki.apache.org/confluence/display/FLINK/FLIP-171%3A+Async+Sink -- This message was sent by Atlassian Jira (v8.3.4#803005)
Re: [DISCUSS] Automated architectural tests
Great! I'll work on getting the PR into an actual, proper shape now,
including looking at found violations more carefully and eventually
freezing current violations (maybe removing some quick-wins).
One more thing I just ran into is that ArchUnit doesn't explicitly support
Scala; while many things just work (since it's still byte code),
Scala-specific concepts like traits seem to cause issues. I'll have to
exclude Scala code from the checks for now, I think.
Ingo
On Tue, Sep 7, 2021 at 5:03 PM Chesnay Schepler wrote:
> I would say that's fine time-wise.
>
> On 07/09/2021 15:29, Ingo Bürk wrote:
> > Thanks, Chesnay. I updated the PR to use a separate module now, and ran
> it
> > on a few modules (some Table API modules and a couple connectors). The CI
> > seemed to take ~2.5min for executing the tests; that's certainly not
> > negligible. On the other hand, even the few tests implemented already
> found
> > several violations ("several" is an understatement, but I manually
> verified
> > some of them, not all of them).
> >
> > On Mon, Sep 6, 2021 at 3:44 PM Chesnay Schepler
> wrote:
> >
> >> While flink-tests is currently the best choice in that it has the
> >> biggest classpath, it is also the module already requiring the most time
> >> on CI.
> >>
> >> Furthermore, given that we ideally cover all APIs (including connectors
> >> & formats), having that mess of dependencies in flink-tests may
> >> interfere with existing / future tests.
> >>
> >> As such I would prefer a separate module, as annoying as that may be.
> >>
> >> On 06/09/2021 15:26, Ingo Bürk wrote:
> >>> I just quickly chatted with the author/maintainer of ArchUnit, and a
> >> module
> >>> which depends on every module that should be tested seems to be the
> best
> >>> solution. How do you feel about using flink-tests for this vs. having a
> >>> separate module for this purpose?
> >>>
> >>>
> >>> Ingo
> >>>
> >>> On Mon, Sep 6, 2021 at 3:04 PM Ingo Bürk wrote:
> >>>
> Hi Chesnay,
>
> Those are all great questions, and I want to tackle those as well. For
> >> the
> moment I went per-module, but runtime-wise that isn't ideal the more
> modules we'd activate this in. ArchUnit does cache classes between
> >> tests,
> but if we run them individually per module, we'd still add up quite a
> >> bit
> of execution time (a single module in my IDE is around 10s with the
> >> tests I
> currently have implemented, but I suspect the bottleneck here is the
> importing of classes, not the number of tests). Ideally we'd just run
> >> them
> once in a module with a big enough classpath to cover everything. If
> we
> have such a place, that would probably be our best shot. I'll also
> keep
> investigating here, of course.
>
> For now I just pushed a solution to avoid the overlap when executing
> it
> per-module by matching on the URI. It's not the prettiest solution,
> but
> does work; but that's more to not fail the tests in unrelated modules
> >> and
> doesn't help much with execution time.
>
>
> Ingo
>
> On Mon, Sep 6, 2021 at 1:57 PM Chesnay Schepler
> wrote:
>
> > Do you have an estimate for long these tests would run for?
> >
> > For project-wide tests, what are the options for setting that up?
> > If we let the tests run per-module then I guess they'd overlap
> > considerably (because other Flink modules are being put on the
> > classpath), which isn't ideal.
> >
> > On 06/09/2021 13:51, David Morávek wrote:
> >> Hi Ingo,
> >>
> >> +1 for this effort. This could automate lot of "written rules" that
> >> are
> >> easy to forget about / not to be aware of (such as that each test
> >> should
> >> extend the TestLogger as Till has already mentioned).
> >>
> >> I went trough your examples and ArchUnit looks really powerful and
> >> expressive while still being easy to read.
> >>
> >> Best,
> >> D.
> >>
> >> On Mon, Sep 6, 2021 at 1:00 PM Ingo Bürk
> wrote:
> >>
> >>> Thanks for your input Chesnay!
> >>>
> >>> The limitations of ArchUnit probably mostly stem from the fact that
> >> it
> >>> operates on byte code and thus can't access anything not accessible
> > from
> >>> byte code, i.e. JavaDocs. But I think Checkstyle and ArchUnit are
> >>> complementing each other quite well here. The main reason against
> >>> Checkstyle for these tests is its limitation to single files only,
> >>> rendering many tests (including the one you mentioned) impossible.
> >> The
> >>> secondary reason is that ArchUnit has more declarative APIs and the
> > tests
> >>> become quite easy to write and maintain (some groundwork effort is
> > needed,
> >>> of course). Over time we could probably expand quite a bit more on
> > what is
> >>> tested with ArchUnit as it can test entire architectures (package
> >>>
[jira] [Created] (FLINK-24226) Improve error message when trying Presto S3 FS with recoverable writer
Chesnay Schepler created FLINK-24226:
Summary: Improve error message when trying Presto S3 FS with
recoverable writer
Key: FLINK-24226
URL: https://issues.apache.org/jira/browse/FLINK-24226
Project: Flink
Issue Type: Technical Debt
Components: FileSystems
Reporter: Chesnay Schepler
Fix For: 1.15.0
When you use the Presto S3 FileSystem with recoverable writers you get this
exception:
{code}
java.lang.UnsupportedOperationException: This s3 file system implementation
does not support recoverable writers.
at
org.apache.flink.fs.s3.common.FlinkS3FileSystem.createRecoverableWriter(FlinkS3FileSystem.java:136)
at
org.apache.flink.core.fs.PluginFileSystemFactory$ClassLoaderFixingFileSystem.createRecoverableWriter(PluginFileSystemFactory.java:134)
at
org.apache.flink.core.fs.SafetyNetWrapperFileSystem.createRecoverableWriter(SafetyNetWrapperFileSystem.java:69)
at
org.apache.flink.streaming.api.functions.sink.filesystem.StreamingFileSink$RowFormatBuilder.createBuckets(StreamingFileSink.java:260)
at
org.apache.flink.streaming.api.functions.sink.filesystem.StreamingFileSink.initializeState(StreamingFileSink.java:396)
{code}
While this is technically _correct_ it's not really helpful to a user. It does
not propose a course of action (e.g., "Use the Hadoop S3 FileSystem instead"),
which is particularly important because this limitation isn't documented.
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