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https://issues.apache.org/jira/browse/FLINK-32008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17719700#comment-17719700
 ] 

Benchao Li commented on FLINK-32008:
------------------------------------

CC [~maosuhan] 

> Protobuf format throws exception with Map datatype
> --------------------------------------------------
>
>                 Key: FLINK-32008
>                 URL: https://issues.apache.org/jira/browse/FLINK-32008
>             Project: Flink
>          Issue Type: Bug
>          Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile)
>    Affects Versions: 1.17.0
>            Reporter: Xuannan Su
>            Priority: Major
>         Attachments: flink-protobuf-example.zip
>
>
> The protobuf format throws exception when working with Map data type. I 
> uploaded a example project to reproduce the problem.
>  
> {code:java}
> Caused by: java.lang.RuntimeException: One or more fetchers have encountered 
> exception
>     at 
> org.apache.flink.connector.base.source.reader.fetcher.SplitFetcherManager.checkErrors(SplitFetcherManager.java:261)
>     at 
> org.apache.flink.connector.base.source.reader.SourceReaderBase.getNextFetch(SourceReaderBase.java:169)
>     at 
> org.apache.flink.connector.base.source.reader.SourceReaderBase.pollNext(SourceReaderBase.java:131)
>     at 
> org.apache.flink.streaming.api.operators.SourceOperator.emitNext(SourceOperator.java:417)
>     at 
> org.apache.flink.streaming.runtime.io.StreamTaskSourceInput.emitNext(StreamTaskSourceInput.java:68)
>     at 
> org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
>     at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:550)
>     at 
> org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:231)
>     at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:839)
>     at 
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:788)
>     at 
> org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:952)
>     at 
> org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:931)
>     at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:745)
>     at org.apache.flink.runtime.taskmanager.Task.run(Task.java:562)
>     at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.RuntimeException: SplitFetcher thread 0 received 
> unexpected exception while polling the records
>     at 
> org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.runOnce(SplitFetcher.java:165)
>     at 
> org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.run(SplitFetcher.java:114)
>     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>     at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>     at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>     at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>     ... 1 more
> Caused by: java.io.IOException: Failed to deserialize PB object.
>     at 
> org.apache.flink.formats.protobuf.deserialize.PbRowDataDeserializationSchema.deserialize(PbRowDataDeserializationSchema.java:75)
>     at 
> org.apache.flink.formats.protobuf.deserialize.PbRowDataDeserializationSchema.deserialize(PbRowDataDeserializationSchema.java:42)
>     at 
> org.apache.flink.api.common.serialization.DeserializationSchema.deserialize(DeserializationSchema.java:82)
>     at 
> org.apache.flink.connector.file.table.DeserializationSchemaAdapter$LineBytesInputFormat.readRecord(DeserializationSchemaAdapter.java:197)
>     at 
> org.apache.flink.connector.file.table.DeserializationSchemaAdapter$LineBytesInputFormat.nextRecord(DeserializationSchemaAdapter.java:210)
>     at 
> org.apache.flink.connector.file.table.DeserializationSchemaAdapter$Reader.readBatch(DeserializationSchemaAdapter.java:124)
>     at 
> org.apache.flink.connector.file.src.util.RecordMapperWrapperRecordIterator$1.readBatch(RecordMapperWrapperRecordIterator.java:82)
>     at 
> org.apache.flink.connector.file.src.impl.FileSourceSplitReader.fetch(FileSourceSplitReader.java:67)
>     at 
> org.apache.flink.connector.base.source.reader.fetcher.FetchTask.run(FetchTask.java:58)
>     at 
> org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.runOnce(SplitFetcher.java:162)
>     ... 6 more
> Caused by: java.lang.reflect.InvocationTargetException
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>     at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>     at java.lang.reflect.Method.invoke(Method.java:498)
>     at 
> org.apache.flink.formats.protobuf.deserialize.ProtoToRowConverter.convertProtoBinaryToRow(ProtoToRowConverter.java:129)
>     at 
> org.apache.flink.formats.protobuf.deserialize.PbRowDataDeserializationSchema.deserialize(PbRowDataDeserializationSchema.java:70)
>     ... 15 more
> Caused by: com.google.protobuf.InvalidProtocolBufferException: While parsing 
> a protocol message, the input ended unexpectedly in the middle of a field.  
> This could mean either that the input has been truncated or that an embedded 
> message misreported its own length.
>     at 
> com.google.protobuf.InvalidProtocolBufferException.truncatedMessage(InvalidProtocolBufferException.java:115)
>     at 
> com.google.protobuf.CodedInputStream$ArrayDecoder.pushLimit(CodedInputStream.java:1196)
>     at 
> com.google.protobuf.CodedInputStream$ArrayDecoder.readMessage(CodedInputStream.java:887)
>     at com.example.proto.MapMessage.<init>(MapMessage.java:64)
>     at com.example.proto.MapMessage.<init>(MapMessage.java:9)
>     at com.example.proto.MapMessage$1.parsePartialFrom(MapMessage.java:756)
>     at com.example.proto.MapMessage$1.parsePartialFrom(MapMessage.java:750)
>     at 
> com.google.protobuf.AbstractParser.parsePartialFrom(AbstractParser.java:158)
>     at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:191)
>     at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:203)
>     at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:208)
>     at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:48)
>     at com.example.proto.MapMessage.parseFrom(MapMessage.java:320)
>     ... 21 more {code}



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