[jira] [Commented] (DAFFODIL-2194) buffered data output stream has a chunk limit of 2GB

["Steve Lawrence (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DAFFODIL-2194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16971758#comment-16971758 ] 

Steve Lawrence commented on DAFFODIL-2194:
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Commit b776f9617657be0d1ccf9aefc53e21eb12ed14cc fixed the issue related to 2GB blob unparsing.

> buffered data output stream has a chunk limit of 2GB
> ----------------------------------------------------
>
>                 Key: DAFFODIL-2194
>                 URL: https://issues.apache.org/jira/browse/DAFFODIL-2194
>             Project: Daffodil
>          Issue Type: Bug
>          Components: Back End
>            Reporter: Steve Lawrence
>            Assignee: Josh Adams
>            Priority: Major
>             Fix For: 2.5.0
>
>
> A buffered data outupt stream is backed by a growable ByteArrayOutputStream, which can only grow to 2GB in size. So if we ever try to write more than 2GB to a buffered output stream during unparse (very possible with large blobs), we'll get an OutOfMemoryError.
> One potential solution is to be aware of the size of a ByteArrayOutputStream when buffering output and automatically create a split when it gets to 2GB in sizes. This will still require a ton of memory since we're buffering these in memoary, but we'll at least be able to unparse more than 2GB of continuous data. 
> Note that we should still be able to unparse more than 2GB of data total, as long as there so single buffer that's more than 2GB.



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