A client sided

MultipartFormDataInput input = aResult.readEntity(MultipartFormDataInput.class);

results in an out of memory error if a huge file-stream is downloaded (from an RESTEasy RESTService) The same big file uploaded to the RESTEasy Service is handled well.

Server side:

@POST
@Path("/xxx")
@Produces("multipart/form-data")
@Consumes("multipart/form-data")
public MultipartFormDataOutput uploadAndDownloadFile( MultipartFormDataInput input)

InputStream input = aResult.readEntity(InputStream.class);
does not solve the problem, even if you try to consume the stream with
a org.apache.commons.fileupload.MultipartStream.

Stack trace:

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at org.jboss.resteasy.client.core.SelfExpandingBufferredInputStream.read(SelfExpandingBufferredInputStream.java:57)
at java.io.SequenceInputStream.read(Unknown Source)
at org.apache.james.mime4j.io.BufferedLineReaderInputStream.fillBuffer(BufferedLineReaderInputStream.java:94)
at org.apache.james.mime4j.io.MimeBoundaryInputStream.fillBuffer(MimeBoundaryInputStream.java:196)
at org.apache.james.mime4j.io.MimeBoundaryInputStream.read(MimeBoundaryInputStream.java:127)
at org.apache.james.mime4j.io.BufferedLineReaderInputStream.fillBuffer(BufferedLineReaderInputStream.java:94)
at org.apache.james.mime4j.io.BufferedLineReaderInputStream.read(BufferedLineReaderInputStream.java:137)
at org.apache.james.mime4j.io.LineReaderInputStreamAdaptor.read(LineReaderInputStreamAdaptor.java:67)
at java.io.FilterInputStream.read(Unknown Source)
at org.apache.james.mime4j.codec.CodecUtil.copy(CodecUtil.java:42)
at org.apache.james.mime4j.storage.AbstractStorageProvider.store(AbstractStorageProvider.java:57)
at org.apache.james.mime4j.message.BodyFactory.binaryBody(BodyFactory.java:92)
at org.jboss.resteasy.plugins.providers.multipart.MultipartInputImpl$BinaryOnlyMessageBuilder.body(MultipartInputImpl.java:132)
at org.apache.james.mime4j.parser.MimeStreamParser.parse(MimeStreamParser.java:101)
at org.jboss.resteasy.plugins.providers.multipart.MultipartInputImpl$BinaryMessage.<init>(MultipartInputImpl.java:153)
at org.jboss.resteasy.plugins.providers.multipart.MultipartInputImpl$BinaryMessage.<init>(MultipartInputImpl.java:146)
at org.jboss.resteasy.plugins.providers.multipart.MultipartInputImpl.parse(MultipartInputImpl.java:197)
at org.jboss.resteasy.plugins.providers.multipart.MultipartFormDataReader.readFrom(MultipartFormDataReader.java:52)
at org.jboss.resteasy.plugins.providers.multipart.MultipartFormDataReader.readFrom(MultipartFormDataReader.java:20)
at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.readFrom(AbstractReaderInterceptorContext.java:59)
at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:51)
at org.jboss.resteasy.plugins.interceptors.encoding.GZIPDecodingInterceptor.aroundReadFrom(GZIPDecodingInterceptor.java:59)
at org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:53)
at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readFrom(ClientResponse.java:244)
at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readEntity(ClientResponse.java:178)
at org.jboss.resteasy.specimpl.BuiltResponse.readEntity(BuiltResponse.java:217)
at test.Main.testResteasy(Main.java:142)
at test.Main.main(Main.java:59)