Francesco Guardiani created FLINK-26988:
-------------------------------------------
Summary: 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
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
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