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https://issues.apache.org/jira/browse/FLINK-18376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17143701#comment-17143701
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LakeShen commented on FLINK-18376:
----------------------------------
Hi [~jark],I find the reason why ArrayIndexOutOfBoundsException in
RetractableTopNFunction. For example, when use ROW_NUMBER() function, the sql
like this :
create view results as select *, ROW_NUMBER() OVER (PARTITION BY name ORDER BY
cnt DESC) as row_num from test
I will output the data when row_num < 5. Now the user_id is "dema", the
SortedMap is :
9 , 1
8, 3
7, 10.
cnt is 8 , it has three record. when the last record of cnt = 8 becomes
retract, It will send the first record when cnt = 7.
But now curRank(4) + count(10) is 14 , rankEnd - curRank - 1 is -9 , so
ArrayIndexOutOfBoundsException will be thrown.
> java.lang.ArrayIndexOutOfBoundsException in RetractableTopNFunction
> -------------------------------------------------------------------
>
> Key: FLINK-18376
> URL: https://issues.apache.org/jira/browse/FLINK-18376
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 1.10.0
> Reporter: LakeShen
> Priority: Major
> Fix For: 1.11.1
>
>
> java.lang.ArrayIndexOutOfBoundsException: -1
> at java.util.ArrayList.elementData(ArrayList.java:422)
> at java.util.ArrayList.get(ArrayList.java:435)
> at
> org.apache.flink.table.runtime.operators.rank.RetractableTopNFunction.retractRecordWithoutRowNumber(RetractableTopNFunction.java:392)
> at
> org.apache.flink.table.runtime.operators.rank.RetractableTopNFunction.processElement(RetractableTopNFunction.java:160)
> at
> org.apache.flink.table.runtime.operators.rank.RetractableTopNFunction.processElement(RetractableTopNFunction.java:54)
> at
> org.apache.flink.streaming.api.operators.KeyedProcessOperator.processElement(KeyedProcessOperator.java:85)
> at
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:173)
> at
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:151)
> at
> org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:128)
> at
> org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:69)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:311)
> at
> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:187)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:487)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:470)
> at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:707)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:532)
> at java.lang.Thread.run(Thread.java:748)
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