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https://issues.apache.org/jira/browse/FLINK-17444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17105372#comment-17105372
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Kostas Kloudas commented on FLINK-17444:
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What [~trohrmann] says is correct and it seems that this is the case since the
introduction of the AzureFS support in Flink. So the AzureFS was never
supported by the {{StreamingFileSink}}.
For the {{StreamingFileSink}} to work with the {{HadoopRecoverableWriter}}, the
writer should be in the classpath and the check
[here|https://github.com/apache/flink/blob/master/flink-filesystems/flink-hadoop-fs/src/main/java/org/apache/flink/runtime/fs/hdfs/HadoopRecoverableWriter.java#L60]
should be changed to also accept {{wasb}}.
That said, I am not sure about the guarantees (e.g. consistency) that the
underlying {{org.apache.hadoop.fs.azure.NativeAzureFileSystem}} offers, so I
cannot comment on the correctness of the result.
> StreamingFileSink Azure HadoopRecoverableWriter class missing.
> --------------------------------------------------------------
>
> Key: FLINK-17444
> URL: https://issues.apache.org/jira/browse/FLINK-17444
> Project: Flink
> Issue Type: Bug
> Components: FileSystems
> Affects Versions: 1.10.0
> Reporter: Marie May
> Priority: Critical
> Fix For: 1.11.0
>
>
> Hello, I was recently attempting to use the Streaming File Sink to store data
> to Azure and get an exception error that it is missing the
> HadoopRecoverableWriter. When I searched if anyone else had the issue I came
> across this post here on [Stack Overflow
> |[https://stackoverflow.com/questions/61246683/flink-streamingfilesink-on-azure-blob-storage]].
> Seeing no one responded, I asked about it on the mailing list and was told
> to submit the issue here.
> This is exception message they posted below but the stack overflow post goes
> into more details of where they believe the issue comes from.
> {code:java}
> java.lang.NoClassDefFoundError:
> org/apache/flink/fs/azure/common/hadoop/HadoopRecoverableWriter
>
> at
> org.apache.flink.fs.azure.common.hadoop.HadoopFileSystem.createRecoverableWriter(HadoopFileSystem.java:202)
>
> at
> org.apache.flink.core.fs.PluginFileSystemFactory$ClassLoaderFixingFileSystem.createRecoverableWriter(PluginFileSystemFactory.java:129)
>
> at
> org.apache.flink.core.fs.SafetyNetWrapperFileSystem.createRecoverableWriter(SafetyNetWrapperFileSystem.java:69)
>
> at
> org.apache.flink.streaming.api.functions.sink.filesystem.Buckets.<init>(Buckets.java:117)
>
> at
> org.apache.flink.streaming.api.functions.sink.filesystem.StreamingFileSink$RowFormatBuilder.createBuckets(StreamingFileSink.java:288)
>
> at
> org.apache.flink.streaming.api.functions.sink.filesystem.StreamingFileSink.initializeState(StreamingFileSink.java:402)
>
> at
> org.apache.flink.streaming.util.functions.StreamingFunctionUtils.tryRestoreFunction(StreamingFunctionUtils.java:178)
>
> at
> org.apache.flink.streaming.util.functions.StreamingFunctionUtils.restoreFunctionState(StreamingFunctionUtils.java:160)
>
> at
> org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.initializeState(AbstractUdfStreamOperator.java:96)
>
> at
> org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:284)
>
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.initializeStateAndOpen(StreamTask.java:1006)
>
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$beforeInvoke$0(StreamTask.java:454)
>
> at
> org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:94)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:449)
>
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:461)
>
> 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)
> {code}
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