[jira] [Commented] (FLINK-20045) ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with "TimeoutException: Contender was not elected as the leader within 200000ms"
[
https://issues.apache.org/jira/browse/FLINK-20045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228928#comment-17228928
]
Dian Fu commented on FLINK-20045:
-
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9361&view=logs&j=6bfdaf55-0c08-5e3f-a2d2-2a0285fd41cf&t=fd9796c3-9ce8-5619-781c-42f873e126a6
> ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with
> "TimeoutException: Contender was not elected as the leader within 20ms"
>
>
> Key: FLINK-20045
> URL: https://issues.apache.org/jira/browse/FLINK-20045
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
>Affects Versions: 1.12.0
>Reporter: Dian Fu
>Assignee: Till Rohrmann
>Priority: Critical
> Labels: pull-request-available, test-stability
> Fix For: 1.12.0
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9251&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=05b74a19-4ee4-5036-c46f-ada307df6cf0
> {code}
> 2020-11-07T10:34:07.5063203Z [ERROR]
> testZooKeeperLeaderElectionRetrieval(org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest)
> Time elapsed: 202.445 s <<< ERROR!
> 2020-11-07T10:34:07.5064331Z java.util.concurrent.TimeoutException: Contender
> was not elected as the leader within 20ms
> 2020-11-07T10:34:07.5064946Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:153)
> 2020-11-07T10:34:07.5065762Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:139)
> 2020-11-07T10:34:07.5066565Z at
> org.apache.flink.runtime.leaderelection.TestingLeaderBase.waitForLeader(TestingLeaderBase.java:48)
> 2020-11-07T10:34:07.5067185Z at
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval(ZooKeeperLeaderElectionTest.java:144)
> {code}
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[jira] [Commented] (FLINK-20045) ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with "TimeoutException: Contender was not elected as the leader within 200000ms"
[
https://issues.apache.org/jira/browse/FLINK-20045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228646#comment-17228646
]
Yang Wang commented on FLINK-20045:
---
Make sense to me.
> ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with
> "TimeoutException: Contender was not elected as the leader within 20ms"
>
>
> Key: FLINK-20045
> URL: https://issues.apache.org/jira/browse/FLINK-20045
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
>Affects Versions: 1.12.0
>Reporter: Dian Fu
>Assignee: Till Rohrmann
>Priority: Critical
> Labels: pull-request-available, test-stability
> Fix For: 1.12.0
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9251&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=05b74a19-4ee4-5036-c46f-ada307df6cf0
> {code}
> 2020-11-07T10:34:07.5063203Z [ERROR]
> testZooKeeperLeaderElectionRetrieval(org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest)
> Time elapsed: 202.445 s <<< ERROR!
> 2020-11-07T10:34:07.5064331Z java.util.concurrent.TimeoutException: Contender
> was not elected as the leader within 20ms
> 2020-11-07T10:34:07.5064946Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:153)
> 2020-11-07T10:34:07.5065762Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:139)
> 2020-11-07T10:34:07.5066565Z at
> org.apache.flink.runtime.leaderelection.TestingLeaderBase.waitForLeader(TestingLeaderBase.java:48)
> 2020-11-07T10:34:07.5067185Z at
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval(ZooKeeperLeaderElectionTest.java:144)
> {code}
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[jira] [Commented] (FLINK-20045) ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with "TimeoutException: Contender was not elected as the leader within 200000ms"
[
https://issues.apache.org/jira/browse/FLINK-20045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228585#comment-17228585
]
Till Rohrmann commented on FLINK-20045:
---
Maybe it is also fine to simply block the {{onGrantLeadership}} and
{{revokeLeadership}} until {{init}} has been called.
> ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with
> "TimeoutException: Contender was not elected as the leader within 20ms"
>
>
> Key: FLINK-20045
> URL: https://issues.apache.org/jira/browse/FLINK-20045
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
>Affects Versions: 1.12.0
>Reporter: Dian Fu
>Priority: Critical
> Labels: test-stability
> Fix For: 1.12.0
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9251&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=05b74a19-4ee4-5036-c46f-ada307df6cf0
> {code}
> 2020-11-07T10:34:07.5063203Z [ERROR]
> testZooKeeperLeaderElectionRetrieval(org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest)
> Time elapsed: 202.445 s <<< ERROR!
> 2020-11-07T10:34:07.5064331Z java.util.concurrent.TimeoutException: Contender
> was not elected as the leader within 20ms
> 2020-11-07T10:34:07.5064946Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:153)
> 2020-11-07T10:34:07.5065762Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:139)
> 2020-11-07T10:34:07.5066565Z at
> org.apache.flink.runtime.leaderelection.TestingLeaderBase.waitForLeader(TestingLeaderBase.java:48)
> 2020-11-07T10:34:07.5067185Z at
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval(ZooKeeperLeaderElectionTest.java:144)
> {code}
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[jira] [Commented] (FLINK-20045) ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with "TimeoutException: Contender was not elected as the leader within 200000ms"
[
https://issues.apache.org/jira/browse/FLINK-20045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228543#comment-17228543
]
Yang Wang commented on FLINK-20045:
---
I agree with you that {{TestingLeaderElectionEventHandler}} could not be
responsible for writing the leader information back to external storage(e.g.
ZooKeeper, K8s ConfigMap). Then in some driver tests, we need to manually call
the {{LeaderElectionDriver#writeLeaderInformation}} so that the
{{LeaderRetrievalDriver}} could get the leader information.
Does it make sense to you? Or you still believe that we need to use the
{{DefaultLeaderElectionService}} which could write back the leader information
to external storage automatically.
> ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with
> "TimeoutException: Contender was not elected as the leader within 20ms"
>
>
> Key: FLINK-20045
> URL: https://issues.apache.org/jira/browse/FLINK-20045
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
>Affects Versions: 1.12.0
>Reporter: Dian Fu
>Priority: Critical
> Labels: test-stability
> Fix For: 1.12.0
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9251&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=05b74a19-4ee4-5036-c46f-ada307df6cf0
> {code}
> 2020-11-07T10:34:07.5063203Z [ERROR]
> testZooKeeperLeaderElectionRetrieval(org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest)
> Time elapsed: 202.445 s <<< ERROR!
> 2020-11-07T10:34:07.5064331Z java.util.concurrent.TimeoutException: Contender
> was not elected as the leader within 20ms
> 2020-11-07T10:34:07.5064946Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:153)
> 2020-11-07T10:34:07.5065762Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:139)
> 2020-11-07T10:34:07.5066565Z at
> org.apache.flink.runtime.leaderelection.TestingLeaderBase.waitForLeader(TestingLeaderBase.java:48)
> 2020-11-07T10:34:07.5067185Z at
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval(ZooKeeperLeaderElectionTest.java:144)
> {code}
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[jira] [Commented] (FLINK-20045) ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with "TimeoutException: Contender was not elected as the leader within 200000ms"
[
https://issues.apache.org/jira/browse/FLINK-20045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228477#comment-17228477
]
Till Rohrmann commented on FLINK-20045:
---
I think the underlying problem is that the
{{TestingLeaderElectionEventHandler}} tries to do too much. Concretely, writing
the leader information via the {{LeaderElectionDriver}}.
I see two ways to solve the problem. Either, we use the
{{DefaultLeaderElectionService}} whose task it is to write the leader
information back or we introduce a {{start}} method which we can use to start
the {{LeaderElectionDriver}}. That way, could initialize the
{{TestingLeaderElectionEventHandler}} before starting the driver.
> ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with
> "TimeoutException: Contender was not elected as the leader within 20ms"
>
>
> Key: FLINK-20045
> URL: https://issues.apache.org/jira/browse/FLINK-20045
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
>Affects Versions: 1.12.0
>Reporter: Dian Fu
>Priority: Critical
> Labels: test-stability
> Fix For: 1.12.0
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9251&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=05b74a19-4ee4-5036-c46f-ada307df6cf0
> {code}
> 2020-11-07T10:34:07.5063203Z [ERROR]
> testZooKeeperLeaderElectionRetrieval(org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest)
> Time elapsed: 202.445 s <<< ERROR!
> 2020-11-07T10:34:07.5064331Z java.util.concurrent.TimeoutException: Contender
> was not elected as the leader within 20ms
> 2020-11-07T10:34:07.5064946Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:153)
> 2020-11-07T10:34:07.5065762Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:139)
> 2020-11-07T10:34:07.5066565Z at
> org.apache.flink.runtime.leaderelection.TestingLeaderBase.waitForLeader(TestingLeaderBase.java:48)
> 2020-11-07T10:34:07.5067185Z at
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval(ZooKeeperLeaderElectionTest.java:144)
> {code}
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[jira] [Commented] (FLINK-20045) ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with "TimeoutException: Contender was not elected as the leader within 200000ms"
[
https://issues.apache.org/jira/browse/FLINK-20045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228448#comment-17228448
]
Till Rohrmann commented on FLINK-20045:
---
I think introducing sleeps is not a reliable way of fixing this problem.
> ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with
> "TimeoutException: Contender was not elected as the leader within 20ms"
>
>
> Key: FLINK-20045
> URL: https://issues.apache.org/jira/browse/FLINK-20045
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
>Affects Versions: 1.12.0
>Reporter: Dian Fu
>Priority: Critical
> Labels: test-stability
> Fix For: 1.12.0
>
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9251&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=05b74a19-4ee4-5036-c46f-ada307df6cf0
> {code}
> 2020-11-07T10:34:07.5063203Z [ERROR]
> testZooKeeperLeaderElectionRetrieval(org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest)
> Time elapsed: 202.445 s <<< ERROR!
> 2020-11-07T10:34:07.5064331Z java.util.concurrent.TimeoutException: Contender
> was not elected as the leader within 20ms
> 2020-11-07T10:34:07.5064946Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:153)
> 2020-11-07T10:34:07.5065762Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:139)
> 2020-11-07T10:34:07.5066565Z at
> org.apache.flink.runtime.leaderelection.TestingLeaderBase.waitForLeader(TestingLeaderBase.java:48)
> 2020-11-07T10:34:07.5067185Z at
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval(ZooKeeperLeaderElectionTest.java:144)
> {code}
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[jira] [Commented] (FLINK-20045) ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with "TimeoutException: Contender was not elected as the leader within 200000ms"
[
https://issues.apache.org/jira/browse/FLINK-20045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17228330#comment-17228330
]
Yang Wang commented on FLINK-20045:
---
I think the root cause is the leader was granted too fast and the
{{TestingLeaderElectionEventHandler#init()}} has not been called. So we could
find the following exception in the maven log. This could not happen in the
production code since we have a {{lock}} in {{DefaultLeaderElectionService}}.
How to fix the unstable tests?
I suggest to add a "wait-with-timeout" in the
{{TestingLeaderElectionEventHandler}} so that we have enough time for creating
{{LeaderElectionDriver}} and then {{init}} the
{{TestingLeaderElectionEventHandler}}.
{code:java}
10:30:37,419 [Curator-LeaderLatch-0] WARN
org.apache.flink.shaded.curator4.org.apache.curator.utils.ZKPaths [] - The
version of ZooKeeper being used doesn't support Container nodes.
CreateMode.PERSISTENT will be used instead.10:30:37,419 [Curator-LeaderLatch-0]
WARN org.apache.flink.shaded.curator4.org.apache.curator.utils.ZKPaths [] -
The version of ZooKeeper being used doesn't support Container nodes.
CreateMode.PERSISTENT will be used instead.10:30:37,468 [ main-EventThread]
ERROR
org.apache.flink.shaded.curator4.org.apache.curator.framework.listen.ListenerContainer
[] - Listener (ZooKeeperLeaderElectionDriver{leaderPath='/leader'}) threw an
exceptionorg.apache.flink.util.FlinkRuntimeException: init() should be called
first. at
org.apache.flink.runtime.leaderelection.TestingLeaderElectionEventHandler.onGrantLeadership(TestingLeaderElectionEventHandler.java:46)
~[test-classes/:?] at
org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionDriver.isLeader(ZooKeeperLeaderElectionDriver.java:158)
~[classes/:?] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.recipes.leader.LeaderLatch$9.apply(LeaderLatch.java:693)
~[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.recipes.leader.LeaderLatch$9.apply(LeaderLatch.java:689)
~[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:100)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.shaded.com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:92)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.recipes.leader.LeaderLatch.setLeadership(LeaderLatch.java:688)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.recipes.leader.LeaderLatch.checkLeadership(LeaderLatch.java:567)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.recipes.leader.LeaderLatch.access$700(LeaderLatch.java:65)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.recipes.leader.LeaderLatch$7.processResult(LeaderLatch.java:618)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.imps.CuratorFrameworkImpl.sendToBackgroundCallback(CuratorFrameworkImpl.java:883)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:653)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.imps.WatcherRemovalFacade.processBackgroundOperation(WatcherRemovalFacade.java:152)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.curator4.org.apache.curator.framework.imps.GetChildrenBuilderImpl$2.processResult(GetChildrenBuilderImpl.java:187)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.zookeeper3.org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:601)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0] at
org.apache.flink.shaded.zookeeper3.org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:508)
[flink-shaded-zookeeper-3-3.4.14-12.0.jar:3.4.14-12.0]10:33:58,379 [
main] INFO
org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionDriver [] -
Closing ZooKeeperLeaderElectionDriver{leaderPath='/leader'}10:33:58,383 [
main] INFO
org.apache.flink.runtime.leaderretrieval.ZooKeeperLeaderRetrievalDriver [] -
Closing Zookeeper
[jira] [Commented] (FLINK-20045) ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with "TimeoutException: Contender was not elected as the leader within 200000ms"
[
https://issues.apache.org/jira/browse/FLINK-20045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17227925#comment-17227925
]
Yang Wang commented on FLINK-20045:
---
I am having a look on this failed test.
> ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval failed with
> "TimeoutException: Contender was not elected as the leader within 20ms"
>
>
> Key: FLINK-20045
> URL: https://issues.apache.org/jira/browse/FLINK-20045
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
>Affects Versions: 1.12.0
>Reporter: Dian Fu
>Priority: Major
> Labels: test-stability
>
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9251&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=05b74a19-4ee4-5036-c46f-ada307df6cf0
> {code}
> 2020-11-07T10:34:07.5063203Z [ERROR]
> testZooKeeperLeaderElectionRetrieval(org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest)
> Time elapsed: 202.445 s <<< ERROR!
> 2020-11-07T10:34:07.5064331Z java.util.concurrent.TimeoutException: Contender
> was not elected as the leader within 20ms
> 2020-11-07T10:34:07.5064946Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:153)
> 2020-11-07T10:34:07.5065762Z at
> org.apache.flink.runtime.testutils.CommonTestUtils.waitUntilCondition(CommonTestUtils.java:139)
> 2020-11-07T10:34:07.5066565Z at
> org.apache.flink.runtime.leaderelection.TestingLeaderBase.waitForLeader(TestingLeaderBase.java:48)
> 2020-11-07T10:34:07.5067185Z at
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionTest.testZooKeeperLeaderElectionRetrieval(ZooKeeperLeaderElectionTest.java:144)
> {code}
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