OkHttp3 - IOException: unexpected end of stream on okhttp3.Address@9d7c59b5

The error occurs when OkHttp try to reuse a connection that is in FIN_WAIT2 state in server, because the server keep_alive timeout is lesser than the client timeout.

StackTrace:

Exception in thread "main" java.io.IOException: unexpected end of stream on okhttp3.Address@e06a4fc7
    at okhttp3.internal.http.Http1xStream.readResponse(Http1xStream.java:201)
    at okhttp3.internal.http.Http1xStream.readResponseHeaders(Http1xStream.java:127)
    at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:53)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:109)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:124)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:170)
    at okhttp3.RealCall.execute(RealCall.java:60)
    at br.com.edallagnol.test.App.main(App.java:54)
Caused by: java.io.EOFException: \n not found: size=0 content=…
    at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:215)
    at okhttp3.internal.http.Http1xStream.readResponse(Http1xStream.java:186)
    ... 17 more

Steps to reproduce:

-Configure a Tomcat(7 or 8) Server with a keep_alive timeout of 60 seconds (default); -Create a OkHttpClient with retryOnConnectionFailure(false) and the default ConnectionPool (5 min timeout); -Do a GET request with client.newCall(request).execute(); -Wait more than 60 seconds (or monitor the connection state, until FIN_WAIT2 state); -Do a GET request with client.newCall(request).execute(), using the same client;

Sample code:

        OkHttpClient client = new OkHttpClient.Builder()
                .retryOnConnectionFailure(false)
                .build();

        for (int i=0; i != 10; i++) {
            Response response = client.newCall(new Request.Builder()
                    .url("http://localhost:8080/")
                    .get()
                    .build()).execute();
            try {
                System.out.println(response.body().string());
            } finally {
                response.close();
            }

            Thread.sleep(61000);
        }

*OkHttp version 3.4.1.

[swankjesse]

Here’s your fix:

OkHttpClient client = new OkHttpClient.Builder()
    .retryOnConnectionFailure(true)
    .build();

[vishnuelectric]

response header (“Connection”:“close”) solved this issue in my case