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https://issues.apache.org/jira/browse/CAMEL-17861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17532832#comment-17532832
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Christian Müller commented on CAMEL-17861:
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Hi [~davsclaus], i tested the solution and found out that it does not work for
FileInputStreamCache
i created a new pullrequest that properly handels FileInputStreamCache as well
[https://github.com/apache/camel/pull/7561/]
regards christian
> Streaming in Azure (Blob-Storage) component not working
> ----------------------------------------------------------
>
> Key: CAMEL-17861
> URL: https://issues.apache.org/jira/browse/CAMEL-17861
> Project: Camel
> Issue Type: Bug
> Components: camel-azure
> Affects Versions: 3.14.1
> Reporter: Christian Müller
> Priority: Major
> Fix For: 3.17.0
>
>
> As described in the email conversation below we are having memory problems
> with the current implementation of the azure (blob storage component).
> Concretely the component does not stream properly!
> _But looking at this stacktrace and the corresponding sourcecode it’s obvious
> that the whole stream is read to memory to check the total payload size
> (seems necessary for the azure client)_
> As we transfer mass data with the azure component we consider this a major
> bug as we cannot use the azure-component as long as it does not stream
> properly.
> Thx and Regards Christian
> Email History (camel user mailing list):
> *Response from Claus Ibsen:*
> What are the sources of those streams?
> I wonder if we could enrich from the message some sort of total size header
> into the camel blob producer, so it can tell the blob client the expected
> length, so it does not read the stream itself to find out.
> Also if you have the opportunity you are welcome to test with latest Camel
> 3.9.0 release, if its still a problem.
>
> And you are welcome to create a JIRA as it would be great to have streaming
> work well with azure, especially for blob as its supposed to be also big
> blobs of data ;)
> *initial question from Lukas Angerer:*
> We are transferring lots of data to the azure-storage with the
> azure-storage-blob component (version 3.7.0)
> The Route itself is only working with streams to keep the memory overhead
> low, streamcaching is enabled.
> But looking at this stacktrace and the corresponding sourcecode it’s obvious
> that the whole stream is read to memory to check the total payload size
> (seems necessary for the azure client)
>
> Caused by: java.lang.OutOfMemoryError: Java heap space
> at
> org.apache.commons.io.output.AbstractByteArrayOutputStream.toByteArrayImpl(AbstractByteArrayOutputStream.java:366)
> at
> org.apache.commons.io.output.ByteArrayOutputStream.toByteArray(ByteArrayOutputStream.java:163)
> at org.apache.commons.io.IOUtils.toByteArray(IOUtils.java:2241)
> at
> org.apache.camel.component.azure.storage.blob.BlobUtils.getInputStreamLength(BlobUtils.java:37)
> at
> org.apache.camel.component.azure.storage.blob.BlobStreamAndLength.createBlobStreamAndLengthFromExchangeBody(BlobStreamAndLength.java:50)
> at
> org.apache.camel.component.azure.storage.blob.operations.BlobOperations.uploadBlockBlob(BlobOperations.java:181)
> at
> org.apache.camel.component.azure.storage.blob.BlobProducer.process(BlobProducer.java:86)
> at
> org.apache.camel.support.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:66)
> at
> org.apache.camel.processor.SendDynamicProcessor.lambda$process$0(SendDynamicProcessor.java:195)
> I was wondering if there is a better way to do this. Maybe a shortcut for the
> cached stream that just checks the size of the cache?
>
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