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zoucao commented on FLINK-26988: -------------------------------- Hi, [~slinkydeveloper], I'm interested in this ticket, would you mind assigning it to me? > Better error reporting when format fails > ---------------------------------------- > > Key: FLINK-26988 > URL: https://issues.apache.org/jira/browse/FLINK-26988 > Project: Flink > Issue Type: Bug > Components: Connectors / FileSystem > Reporter: Francesco Guardiani > Priority: Major > > Today when a format fails, depending on the format implementation, there > might be no information about the split (file name, offset, etc), making hard > to debug format failures. For example, here is what I've seen with csv format: > {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:225) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.SourceReaderBase.getNextFetch(SourceReaderBase.java:169) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.SourceReaderBase.pollNext(SourceReaderBase.java:130) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.api.operators.SourceOperator.emitNextNotReading(SourceOperator.java:403) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.api.operators.SourceOperator.emitNext(SourceOperator.java:387) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.runtime.io.StreamTaskSourceInput.emitNext(StreamTaskSourceInput.java:68) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.runtime.io.StreamMultipleInputProcessor.processInput(StreamMultipleInputProcessor.java:85) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:531) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:227) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:841) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:767) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:948) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:927) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:741) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at org.apache.flink.runtime.taskmanager.Task.run(Task.java:563) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at java.lang.Thread.run(Thread.java:829) ~[?:?] > 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:150) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.run(SplitFetcher.java:105) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[?:?] > at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?] > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) > ~[?:?] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) > ~[?:?] > at java.lang.Thread.run(Thread.java:829) ~[?:?] > Caused by: java.lang.RuntimeException: Invalid UTF-8 middle byte 0x54 (at > char #3529, byte #3528): check content encoding, does not look like UTF-8 > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.MappingIterator._handleIOException(MappingIterator.java:417) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.MappingIterator.hasNext(MappingIterator.java:190) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.formats.csv.CsvReaderFormat$Reader.read(CsvReaderFormat.java:194) > ~[flink-csv-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.file.src.impl.StreamFormatAdapter$Reader.readBatch(StreamFormatAdapter.java:214) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.file.src.impl.FileSourceSplitReader.fetch(FileSourceSplitReader.java:67) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.fetcher.FetchTask.run(FetchTask.java:58) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.runOnce(SplitFetcher.java:142) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.run(SplitFetcher.java:105) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[?:?] > at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?] > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) > ~[?:?] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) > ~[?:?] > at java.lang.Thread.run(Thread.java:829) ~[?:?] > Caused by: java.io.CharConversionException: Invalid UTF-8 middle byte 0x54 > (at char #3529, byte #3528): check content encoding, does not look like UTF-8 > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.impl.UTF8Reader.reportInvalidOther(UTF8Reader.java:507) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.impl.UTF8Reader.reportDeferredInvalid(UTF8Reader.java:518) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.impl.UTF8Reader.read(UTF8Reader.java:172) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.impl.CsvDecoder.loadMore(CsvDecoder.java:443) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.impl.CsvDecoder._nextChar(CsvDecoder.java:945) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.impl.CsvDecoder.nextString(CsvDecoder.java:642) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.CsvParser._skipUntilEndOfLine(CsvParser.java:1155) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.dataformat.csv.CsvParser.nextToken(CsvParser.java:680) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.MappingIterator._resync(MappingIterator.java:394) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.MappingIterator.hasNextValue(MappingIterator.java:238) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.MappingIterator.hasNext(MappingIterator.java:186) > ~[flink-dist-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.formats.csv.CsvReaderFormat$Reader.read(CsvReaderFormat.java:194) > ~[flink-csv-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.file.src.impl.StreamFormatAdapter$Reader.readBatch(StreamFormatAdapter.java:214) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.file.src.impl.FileSourceSplitReader.fetch(FileSourceSplitReader.java:67) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.fetcher.FetchTask.run(FetchTask.java:58) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.runOnce(SplitFetcher.java:142) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > org.apache.flink.connector.base.source.reader.fetcher.SplitFetcher.run(SplitFetcher.java:105) > ~[flink-connector-files-1.16-SNAPSHOT.jar:1.16-SNAPSHOT] > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[?:?] > at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?] > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) > ~[?:?] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) > ~[?:?] > at java.lang.Thread.run(Thread.java:829) ~[?:?] {code} > It would be nice and helpful to add informations such as filename and offset > to the exception propagated by the split reader thread, so any format can > profit from it -- This message was sent by Atlassian Jira (v8.20.1#820001)