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https://issues.apache.org/jira/browse/FLINK-33588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17797041#comment-17797041
]
Tongtong Zhu commented on FLINK-33588:
--------------------------------------
[~jingge] CI report is no problem is Success
!image-2023-12-15-13-59-28-201.png!
> Fix Flink Checkpointing Statistics Bug
> --------------------------------------
>
> Key: FLINK-33588
> URL: https://issues.apache.org/jira/browse/FLINK-33588
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Checkpointing
> Affects Versions: 1.14.5, 1.16.0, 1.17.0, 1.15.2, 1.14.6, 1.18.0, 1.17.1
> Reporter: Tongtong Zhu
> Assignee: Tongtong Zhu
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.19.0, 1.18.1
>
> Attachments: FLINK-33588.patch, image-2023-12-11-17-35-23-391.png,
> image-2023-12-13-11-35-43-780.png, image-2023-12-15-13-59-28-201.png,
> newCommit-FLINK-33688.patch
>
>
> When the Flink task is first started, the checkpoint data is null due to the
> lack of data, and Percentile throws a null pointer exception when calculating
> the percentage. After multiple tests, I found that it is necessary to set an
> initial value for the statistical data value of the checkpoint when the
> checkpoint data is null (i.e. at the beginning of the task) to solve this
> problem.
> The following is an abnormal description of the bug：
> 2023-09-13 15:02:54,608 ERROR
> org.apache.flink.runtime.rest.handler.job.checkpoints.CheckpointingStatisticsHandler
> [] - Unhandled exception.
> org.apache.commons.math3.exception.NullArgumentException: input array
> at
> org.apache.commons.math3.util.MathArrays.verifyValues(MathArrays.java:1650)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.commons.math3.stat.descriptive.AbstractUnivariateStatistic.test(AbstractUnivariateStatistic.java:158)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.commons.math3.stat.descriptive.rank.Percentile.evaluate(Percentile.java:272)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.commons.math3.stat.descriptive.rank.Percentile.evaluate(Percentile.java:241)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.metrics.DescriptiveStatisticsHistogramStatistics$CommonMetricsSnapshot.getPercentile(DescriptiveStatisticsHistogramStatistics.java:159)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.metrics.DescriptiveStatisticsHistogramStatistics.getQuantile(DescriptiveStatisticsHistogramStatistics.java:53)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.checkpoint.StatsSummarySnapshot.getQuantile(StatsSummarySnapshot.java:108)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.rest.messages.checkpoints.StatsSummaryDto.valueOf(StatsSummaryDto.java:81)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.rest.handler.job.checkpoints.CheckpointingStatisticsHandler.createCheckpointingStatistics(CheckpointingStatisticsHandler.java:129)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.rest.handler.job.checkpoints.CheckpointingStatisticsHandler.handleRequest(CheckpointingStatisticsHandler.java:84)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.rest.handler.job.checkpoints.CheckpointingStatisticsHandler.handleRequest(CheckpointingStatisticsHandler.java:58)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.rest.handler.job.AbstractAccessExecutionGraphHandler.handleRequest(AbstractAccessExecutionGraphHandler.java:68)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> org.apache.flink.runtime.rest.handler.job.AbstractExecutionGraphHandler.lambda$handleRequest$0(AbstractExecutionGraphHandler.java:87)
> ~[flink-dist_2.12-1.14.5.jar:1.14.5]
> at
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
> [?:1.8.0_151]
> at
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
> [?:1.8.0_151]
> at
> java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
> [?:1.8.0_151]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> [?:1.8.0_151]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_151]
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
> [?:1.8.0_151]
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
> [?:1.8.0_151]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> [?:1.8.0_151]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> [?:1.8.0_151]
> at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
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