[Jersey] Re: Message body reader/writer provider over very large InputStream

From: Marek Potociar <>
Date: Fri, 19 Dec 2014 12:11:12 +0100

You do not write whether the problem is on the client or server side, but from the content I assume client.

To transfer large files you need to use chunked encoding and disable buffering. You may need to look into HttpUrlConnection or Apache HTTP Client configuration to disable buffering at the connector level.


> On 19 Dec 2014, at 07:18, Behrooz Nobakht <> wrote:
> Hi,
> This is a repost as the original received an unintentional deviation that
> may create the impression this is already discussed/replied.
> I already admit that this has not been the best approach.
> Yet this is a legacy context so please bear with me.
> I have a piece of application that is built on top of Jersey.
> One of the functionalities of the application is to transfer files over network
> through RESTful API on top of Jersey.
> We use a custom “message body reader/writer” for this purpose.
> The problem is that some times it could be that the transferred files are very large.
> This eventually leads to an OutOfMemoryError in the JVM.
> Basically, the API boils down to where we use the entityStream from Jersey API
> to write the body of the message. The Jersey API in a lower level uses an output stream
> that is provided by the URLConnection implementation. For this, there are two case:
> Using default URL connection factory that is on top of sun.* implementation.
> Using Apache HTTP Client.
> In both cases, the implementation uses an instance of ByteArrayOutputStream.
> The problem starts when growing the internal array is not possible
> and that’s how the memory error appears.
> Is there a workaround or solution for this either in configuration level or implementation level?
> We start to see the problem with around the files with size ~1.5GB.
> Thanks,
> Behrooz