java.io.IOException : 저지를 사용하는 Java의 REST에서 조기 EOF

Question

RESTful Web Service in Java using jersey을 구현하고 Tomcat7에서 실행하십시오.

try { 
    response = service.path("task/users/are/").type("application/json").get(ClientResponse.class); 
    s = response.getEntity(String.class); 
    System.out.println(s); 
} catch (Exception e) { 
    e.printStackTrace(); 
} 

결과의 예 :

[{"id":5369,"start":1331428800000,"end":1331428800000,"description":"","started":false,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"activity":{"id":102,"key":"d","name":"Development","description":"Usually this.","cost":690.0,"orderIndex":2,"parent":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null}},"deliverable":{"id":1282,"description":"andra saker","key":"andra","name":"Other","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":{"id":1266,"description":"","key":"other","name":"Other","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":null,"user":null,"orderIndex":0,"done":false,"minEstimate":null,"maxEstimate":null,"task_id":0},"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":3,"done":false,"minEstimate":10.0,"maxEstimate":30.0,"task_id":0},"link":""},{"id":5324,"start":1331254080000,"end":1331254800000,"description":"","started":false,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"activity":{"id":102,"key":"d","name":"Development","description":"Usually this.","cost":690.0,"orderIndex":2,"parent":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null}},"deliverable":{"id":1274,"description":"","key":"login","name":"Login","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":{"id":1273,"description":"","key":"client","name":"Android client","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":null,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":2,"done":false,"minEstimate":null,"maxEstimate":null,"task_id":0},"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":1,"done":false,"minEstimate":15.0,"maxEstimate":30.0,"task_id":0},"link":""},{"id":7901,"start":1338678900000,"end":1338678900000,"description":"","started":false,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"activity":{"id":101,"key":"c","name":"Consulting","description":"Just in special cases, authorized by Rüdiger after discussion with customer.","cost":990.0,"orderIndex":3,"parent":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null}},"deliverable":{"id":1278,"description":"Stagtistic check","key":"statistic","name":"Statistics","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":{"id":1273,"description":"","key":"client","name":"Android client","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":null,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":2,"done":false,"minEstimate":null,"maxEstimate":null,"task_id":0},"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":5,"done":false,"minEstimate":20.0,"maxEstimate":40.0,"task_id":0},"link":""},{"id":10441,"start":1347134220000,"end":1347135120000,"description":"hello","started":false,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"activity":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"deliverable":{"id":1278,"description":"Stagtistic check","key":"statistic","name":"Statistics","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":{"id":1273,"description":"","key":"client","name":"Android client","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":null,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":2,"done":false,"minEstimate":null,"maxEstimate":null,"task_id":0},"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":5,"done":false,"minEstimate":20.0,"maxEstimate":40.0,"task_id":0},"link":""},{"id":6259,"start":1334170080000,"end":1334170140000,"description":"hi","started":false,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"activity":{"id":102,"key":"d","name":"Development","description":"Usually this.","cost":690.0,"orderIndex":2,"parent":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null}},"deliverable":{"id":1276,"description":"","key":"task","name":"Uppgifter","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":{"id":1273,"description":"","key":"client","name":"Android client","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":null,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":2,"done":false,"minEstimate":null,"maxEstimate":null,"task_id":0},"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":3,"done":false,"minEstimate":15.0,"maxEstimate":30.0,"task_id":0},"link":""},{"id":7900,"start":1338678600000,"end":1338678780000,"description":"","started":false,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"activity":{"id":102,"key":"d","name":"Development","description":"Usually this.","cost":690.0,"orderIndex":2,"parent":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null}},"deliverable":{"id":1276,"description":"","key":"task","name":"Uppgifter","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":{"id":1273,"description":"","key":"client","name":"Android client","project":{"id":115,"key":"are","name":"Master Thesis","description":"Android client for Timelog","date":1328396400000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":null,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":2,"done":false,"minEstimate":null,"maxEstimate":null,"task_id":0},"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"orderIndex":3,"done":false,"minEstimate":15.0,"maxEstimate":30.0,"task_id":0},"link":""},{"id":6258,"start":1334170020000,"end":1334170080000,"description":"Develop","started":false,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"project":{"id":109,"key":"mre","name":"Master Thesis Ali Rezaei","description":"Timelog Android","date":1328223600000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"activity":{"id":102,"key":"d","name":"Development","description":"Usually this.","cost":690.0,"orderIndex":2,"parent":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null}},"deliverable":{"id":1495,"description":"Develop statistic","key":"3.2","name":"statistic","project":{"id":109,"key":"mre","name":"Master Thesis Ali Rezaei","description":"Timelog Android","date":1328223600000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":{"id":1240,"description":"Developing","key":"3","name":"Android Client","project":{"id":109,"key":"mre","name":"Master Thesis Ali Rezaei","description":"Timelog Android","date":1328223600000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":null,"user":null,"orderIndex":2,"done":false,"minEstimate":0.0,"maxEstimate":0.0,"task_id":0},"user":null,"orderIndex":2,"done":false,"minEstimate":null,"maxEstimate":null,"task_id":0},"link":""},{"id":10442,"start":1347134640000,"end":1347135540000,"description":"hello","started":false,"user":{"id":28,"username":"are","hash":"$2a$10$G0e7cjXtn60XmAhUx8JpNOYk.EwpIEwDvc2mBaNsTGqQe1tgIZAxy"},"project":{"id":109,"key":"mre","name":"Master Thesis Ali Rezaei","description":"Timelog Android","date":1328223600000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"activity":{"id":108,"key":"v","name":"Vacation/Holidays","description":"Planned vacation (counting agains the 25 days)","cost":300.0,"orderIndex":5,"parent":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null}},"deliverable":{"id":1237,"description":"","key":"o","name":"Other","project":{"id":109,"key":"mre","name":"Master Thesis Ali Rezaei","description":"Timelog Android","date":1328223600000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":{"id":1236,"description":"","key":"other","name":"Other","project":{"id":109,"key":"mre","name":"Master Thesis Ali Rezaei","description":"Timelog Android","date":1328223600000,"category":{"id":100,"key":"scrum","name":"Scrum","description":"","cost":0.0,"orderIndex":1,"parent":null},"valueType":0,"fixValue":0.0,"done":0,"task_id":0},"parent":null,"user":null,"orderIndex":0,"done":false,"minEstimate":null,"maxEstimate":null,"task_id":0},"user":null,"orderIndex":2,"done":true,"minEstimate":null,"maxEstimate":null,"task_id":0},"link":""}] 

그것을 내가 좋아하는 저지 클라이언트를 테스트

@GET 
@Path("https://stackoverflow.com/users/{username}/") 
@Consumes(MediaType.APPLICATION_JSON) 
@Produces(MediaType.APPLICATION_JSON) 
public Response taskList(@PathParam("username") String username) {  
     Session session = HibernateUtil.getSessionFactory().getCurrentSession(); 
     session.beginTransaction(); 
     List<Task> tasks = null; 
     try { 
      tasks = (List<Task>)session.createQuery("from Task as t where t.user.username = :name order by t.project.key ASC, t.deliverable.key ASC, t.activity.key ASC, t.start ASC").setString("name", username).list(); 
     } catch (HibernateException e) { 
      e.printStackTrace(); 
      session.getTransaction().rollback(); 
     } 
     session.getTransaction().commit(); 
     return Response.ok().entity(tasks).build(); 
    } 

:

나는 작업의 목록을 얻을 수있는이 쿼리를 이 사용자에 대해 완벽하게 작동합니다 (은 임). 그들.

사용자가 데이터베이스에서 작업 엄청난 수의을 가지고

, 그래서 나는이 오류가있어 : 내가 어떤 도움을 주셔서 감사합니다

Caused by: java.io.IOException: Premature EOF 
    at sun.net.www.http.ChunkedInputStream.readAheadBlocking(Unknown Source) 
    at sun.net.www.http.ChunkedInputStream.readAhead(Unknown Source) 
    at sun.net.www.http.ChunkedInputStream.read(Unknown Source) 
    at java.io.FilterInputStream.read(Unknown Source) 
    at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(Unknown Source) 
    at sun.nio.cs.StreamDecoder.readBytes(Unknown Source) 
    at sun.nio.cs.StreamDecoder.implRead(Unknown Source) 
    at sun.nio.cs.StreamDecoder.read(Unknown Source) 
    at java.io.InputStreamReader.read(Unknown Source) 
    at java.io.Reader.read(Unknown Source) 
    at com.sun.jersey.core.util.ReaderWriter.readFromAsString(ReaderWriter.java:171) 
    at com.sun.jersey.core.util.ReaderWriter.readFromAsString(ReaderWriter.java:157) 
    at com.sun.jersey.core.provider.AbstractMessageReaderWriterProvider.readFromAsString(AbstractMessageReaderWriterProvider.java:114) 
    at com.sun.jersey.core.impl.provider.entity.StringProvider.readFrom(StringProvider.java:73) 
    at com.sun.jersey.core.impl.provider.entity.StringProvider.readFrom(StringProvider.java:58) 
    at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:554) 
    ... 2 more 

합니다.

---

은 부칙

나는 문제가 서버 측에없는 것을 알아 냈다. 그것은 클라이언트 측에 있습니다. 나는 메모리 부족 문제를 안고있는 안드로이드 클라이언트를 가지고 있습니다.

문제는 클라이언트 측에서이 문제를 어떻게 해결할 수 있는가입니다. 너는 어떤 생각을 가지고 있니?

Answer 1

엄청난 하나 다른 옵션은 다시 클라이언트로 페이지 데이터이다. 목록이 굉장히 많으면 사용자 및 인터페이스에 유용하지 않을 수도 있습니다 (경험치가 확실하지 않은 경우). 예를 들어, StackOverflow를 살펴보십시오. 매일 많은 수의 게시물이 있지만 인터페이스 (백엔드 쿼리 패턴)가 데이터를 페이지합니다. 이 25으로 시작합니다 경우

간단한 페이징 방법은 "추가"패턴 "

/users/{username}/tasks?top=n 

입니다, 더 IOS는 메일의 종류와 같은 상위 50 등을 끌어 링크 ... 등이있을 수 있습니다 또 다른 방법은 "페이지"당신이 세트가 안정할지 여부를 선택합니다. 즉

이

/users/{username}/tasks?page=1 

흥미로운 질문, 해당 사용자의 작업 CH가되어 유사한 애플 리케이션.

입니다 페이지 2로가는 것은 사용자가 '쿼리에 대한 상태를 유지하지 않는 한 항목을 건너 뛰거나 1 페이지에있는 항목을 표시 할 수 있습니다.'- DB, 중간 계층 (문제가있는 다중 AT) 또는 클라이언트 (모든 ID 반환 및 클라이언트 페이지 열/데이터 있음) - 일종의 가상 목록보기.

그냥 모든 데이터를 반환, 거대한 데이터 세트로 작업

는 종종 정답 아니며, 그것은 페이징 등을 사용하여 접근 ... 다른 대안에 대한 몇 가지 생각을 불꽃

희망을 복잡하게 시작합니다. 아마도 당신의 문제에 대한 정확한 대답은 아닙니다.

Answer 2

많은 양의 데이터가 반환되는 문제가 있습니다. 응답에서 데이터를 읽으려면 아래 코드를 시도하십시오. 돌아 오는 항목의 수는 진정 경우

InputStream is = response.getEntityInputStream(); 
    BufferedReader r = new BufferedReader(new InputStreamReader(is)); 
    int more = 1; 
    StringBuilder responseString = new StringBuilder(); 
    char[] cbuf = new char[5000]; 
    while (more > 0) { 
     more = r.read(cbuf, 0, 5000); 
     responseString.append(cbuf); 
    } 
    System.out.println(responseString.toString());