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POHow to avoid OutOfMemoryError when uploading a large file using Jersey client
 

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    <p>I am using Jersey client for http-based request. It works well if the file is small but run into error when I post a file with size of 700M:</p> <pre><code>Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2786) at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94) at sun.net.www.http.PosterOutputStream.write(PosterOutputStream.java:61) at com.sun.jersey.api.client.CommittingOutputStream.write(CommittingOutputStream.java:90) at com.sun.jersey.core.util.ReaderWriter.writeTo(ReaderWriter.java:115) at com.sun.jersey.core.provider.AbstractMessageReaderWriterProvider.writeTo(AbstractMessageReaderWriterProvider.java:76) at com.sun.jersey.core.impl.provider.entity.FileProvider.writeTo(FileProvider.java:103) at com.sun.jersey.core.impl.provider.entity.FileProvider.writeTo(FileProvider.java:64) at com.sun.jersey.multipart.impl.MultiPartWriter.writeTo(MultiPartWriter.java:224) at com.sun.jersey.multipart.impl.MultiPartWriter.writeTo(MultiPartWriter.java:71) at com.sun.jersey.api.client.RequestWriter.writeRequestEntity(RequestWriter.java:300) at com.sun.jersey.client.urlconnection.URLConnectionClientHandler._invoke(URLConnectionClientHandler.java:204) at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:147) at com.sun.jersey.api.client.Client.handle(Client.java:648) at com.sun.jersey.api.client.WebResource.handle(WebResource.java:680) at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) at com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:568) at TestHttpRequest.main(TestHttpRequest.java:42) </code></pre> <p>here is my code:</p> <pre><code>ClientConfig cc = new DefaultClientConfig(); Client client = Client.create(cc); WebResource resource = client.resource("http://localhost:8080/JerseyWithServletTest/helloworld"); FormDataMultiPart form = new FormDataMultiPart(); File file = new File("E:/CN_WXPPSP3_v312.ISO"); form.field("username", "ljy"); form.field("password", "password"); form.field("filename", file.getName()); form.bodyPart(new FileDataBodyPart("file", file, MediaType.MULTIPART_FORM_DATA_TYPE)); ClientResponse response = resource.type(MediaType.MULTIPART_FORM_DATA).post(ClientResponse.class, form); </code></pre>
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