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Posted to dev@daffodil.apache.org by "Steve Lawrence (Jira)" <ji...@apache.org> on 2019/08/28 16:34:00 UTC
[jira] [Assigned] (DAFFODIL-2194) buffered data output stream has a
chunk limit of 2GB
[ https://issues.apache.org/jira/browse/DAFFODIL-2194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Lawrence reassigned DAFFODIL-2194:
----------------------------------------
Assignee: Steve Lawrence
> 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: Steve Lawrence
> 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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