[jira] [Comment Edited] (FLINK-25238) flink iceberg source reading array types fail with Cast Exception

["Yi Tang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-25238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17515682#comment-17515682 ] 

Yi Tang edited comment on FLINK-25238 at 4/1/22 3:06 AM:
---------------------------------------------------------

[~sjwiesman] Shall we reopen this issue. The similar issue for MapData is fixed in FLINK-21247, and the detail is like that been explained in https://issues.apache.org/jira/browse/FLINK-21247?focusedCommentId=17278483&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17278483

 

cc [~openinx] , [~lzljs3620320] 


was (Author: yittg):
[~sjwiesman] Shall we reopen this issue. The similar issue for MapData is fixed in FLINK-21247, and the detail is like that been explained in [FLINK-21247#comment-17278483|#comment-17278483].

 

cc [~openinx] , [~lzljs3620320] 

> flink iceberg source reading array types fail with Cast Exception
> -----------------------------------------------------------------
>
>                 Key: FLINK-25238
>                 URL: https://issues.apache.org/jira/browse/FLINK-25238
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Runtime
>    Affects Versions: 1.13.2
>            Reporter: Praneeth Ramesh
>            Priority: Major
>         Attachments: Screen Shot 2021-12-09 at 6.58.56 PM.png, Screen Shot 2021-12-09 at 7.04.10 PM.png
>
>
> I have a stream with iceberg table as a source. I have few columns of array types in the table. 
> I try to read using iceberg connector. 
> Flink Version : 1.13.2
> Iceberg Flink Version: 0.12.1
>  
> I see the error as below.
> java.lang.ClassCastException: class org.apache.iceberg.flink.data.FlinkParquetReaders$ReusableArrayData cannot be cast to class org.apache.flink.table.data.ColumnarArrayData (org.apache.iceberg.flink.data.FlinkParquetReaders$ReusableArrayData and org.apache.flink.table.data.ColumnarArrayData are in unnamed module of loader 'app')
>     at org.apache.flink.table.runtime.typeutils.ArrayDataSerializer.copy(ArrayDataSerializer.java:90)
>     at org.apache.flink.table.runtime.typeutils.ArrayDataSerializer.copy(ArrayDataSerializer.java:47)
>     at org.apache.flink.table.runtime.typeutils.RowDataSerializer.copyRowData(RowDataSerializer.java:170)
>     at org.apache.flink.table.runtime.typeutils.RowDataSerializer.copy(RowDataSerializer.java:131)
>     at org.apache.flink.table.runtime.typeutils.RowDataSerializer.copy(RowDataSerializer.java:48)
>     at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:69)
>     at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)
>     at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)
>     at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)
>     at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)
>     at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndCollect(StreamSourceContexts.java:317)
>     at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.collect(StreamSourceContexts.java:411)
>     at org.apache.iceberg.flink.source.StreamingReaderOperator.processSplits(StreamingReaderOperator.java:155)
>     at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:50)
>     at org.apache.flink.streaming.runtime.tasks.mailbox.Mail.run(Mail.java:90)
>     at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMailsNonBlocking(MailboxProcessor.java:359)
>     at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMail(MailboxProcessor.java:323)
>     at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:202)
>     at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:681)
>     at org.apache.flink.streaming.runtime.tasks.StreamTask.executeInvoke(StreamTask.java:636)
>     at org.apache.flink.streaming.runtime.tasks.StreamTask.runWithCleanUpOnFail(StreamTask.java:647)
>     at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:620)
>     at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:779)
>     at org.apache.flink.runtime.taskmanager.Task.run(Task.java:566)
>     at java.base/java.lang.Thread.run(Thread.java:834)
>  
> Could be same issue as https://issues.apache.org/jira/browse/FLINK-21247 except it happening for another type.
> I see that Iceberg use custom types other than the types from 
> org.apache.flink.table.data like
> org.apache.iceberg.flink.data.FlinkParquetReaders.ReusableArrayData and these types are not handled in org.apache.flink.table.runtime.typeutils.ArrayDataSerializer
> !Screen Shot 2021-12-09 at 6.58.56 PM.png!
>  Just to try I changed the above code to handle the iceberg type as a binary Array and built it locally and used in my application and that worked. 
>  
> !Screen Shot 2021-12-09 at 7.04.10 PM.png!
> Not sure if this is already handled in some newer versions. 



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