java - InputStream Infinit Loop -

i'm trying upload file android tomcat server running jersey. i'm packaging inside post request.

this in android:

protected string doinbackground(string... params) {     string url = params[0];     string pathtofile = params[1];     httpclient httpclient = new defaulthttpclient();     httpcontext localcontext = new basichttpcontext();     httppost httppost = new httppost();     httpresponse response = null;     httppost.addheader("cookie", "sessiontoken=~session");     try {         httppost.seturi(new uri(url));         httppost.setheader("accept", "application/json");         multipartentity entity = new multipartentity(                 httpmultipartmode.browser_compatible);         file file = new file(pathtofile);         if(!file.exists())             return null;         filebody filebody = new filebody(file);         entity.addpart("file", filebody);         httppost.setentity(entity);          response = httpclient.execute(httppost);         httpentity result = response.getentity();     } catch (clientprotocolexception e) {         // todo auto-generated catch block         e.printstacktrace();     } catch (ioexception e) {         // todo auto-generated catch block         e.printstacktrace();     } catch (urisyntaxexception e) {         // todo auto-generated catch block         e.printstacktrace();     } catch(exception e){         e.printstacktrace();     }     return response.getstatusline().tostring(); 

in server have following:

i receive inputstream of type "org.jvnet.mimepull.datahead$readmultistream" , while reading it, read goes 1024 after reaching end of file.

@post @consumes({ mediatype.multipart_form_data }) @produces({ mediatype.application_json }) public response uploadstoragefile(@context uriinfo ui, @context httpheaders hh, @formdataparam("file")  inputstream uploadedinputstream, @formdataparam("file") formdatacontentdisposition filedetail){     system.out.println(uploadedinputstream.getclass().getname());     string uploadedfilelocation = filedetail.getfilename();     long size = filedetail.getsize();     // save     writetofile(uploadedinputstream);      string output = "file uploaded : ";      return response.status(200).entity(output).build();  } private void writetofile(inputstream uploadedinputstream) {          try {             outputstream out = new fileoutputstream(new file("test.jpg"));             int read = 0;             byte[] bytes = new byte[1024];             while ((read = uploadedinputstream.read(bytes)) > 0) {                 out.write(bytes, 0, read);             }             out.flush();             out.close();         } catch (ioexception e) {              e.printstacktrace();         }      } 

if length of file 8192, cycle goes this: 1024,2048,3072,4096,5120,6144,7168,8192,1024 -> why?

note: have tried condition @ -1.

can figure out going on?

since helped solve problem, latest comment indicates this bug responsible.

both methods "read" on readmultistream class violate contract of implemented interface java.io.inputstream. javadoc states, -1 should returned @ end of stream, readmultistream class returns -1 first call (at end of stream), subsequent calls throw exception instead. problem simulated sending stream of characters on web service , wrapping java.io.bufferedreader on client side. when stream doesn't end new line character, usual usage of method readline fails.

fix version/s: 2.2.6