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My Spring Boot uses okhttp3 to send HTTP requests as a client. I have no control over the servers. (But I can ask server team to change the settings if needs be.)

<dependency>
  <groupId>com.squareup.okhttp3</groupId>
  <artifactId>okhttp</artifactId>
  <version>3.10.0</version>
</dependency>

Service code

package ...;

import okhttp3.*;
import okhttp3.logging.HttpLoggingInterceptor;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

@Service
public class OkHttpClientService {
    private final OkHttpClient client;
    private static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");

    public OkHttpClientService() {
        this.client = new OkHttpClient.Builder()
                .retryOnConnectionFailure(false)  
                .connectTimeout(5, TimeUnit.SECONDS)                
                .readTimeout(5, TimeUnit.SECONDS)                                          
                .connectionPool(new ConnectionPool(5, 300, TimeUnit.SECONDS))
                .build();
    }

    public String postRequest(String jsonBody) throws IOException {
        RequestBody body = RequestBody.create(JSON, jsonBody);
        Request request = new Request.Builder()
                .url("https://sample.server.com/sample-path")
                .post(body)
                .addHeader("Content-Type", "application/json")
                .build();

        try (Response response = client.newCall(request).execute()) {
            return response.body() != null ? response.body().string() : "No response";
        }
    }
}

Most of the requests are sent successfully. But I get intermittent exceptions. I could not reproduce the exceptions below.

  1. javax.net.ssl.SSLException: Socket closed
java.net.SocketTimeoutException: timeout
    at okio.Okio$4.newTimeoutException(Okio.java:232)
    at okio.AsyncTimeout.exit(AsyncTimeout.java:285)
    at okio.AsyncTimeout$2.read(AsyncTimeout.java:241)
    at okio.RealBufferedSource.indexOf(RealBufferedSource.java:355)
    at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.java:227)
    at okhttp3.internal.http1.Http1Codec.readHeaderLine(Http1Codec.java:215)
    at okhttp3.internal.http1.Http1Codec.readResponseHeaders(Http1Codec.java:189)
    at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:88)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:126)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
    at okhttp3.RealCall.execute(RealCall.java:77)
    at com.foo.fooService.sendRequest(FooService.java:XXX)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: javax.net.ssl.SSLException: Socket closed
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:127)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:326)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:269)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:264)
    at java.base/sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1306)
    at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:832)
    at okio.Okio$2.read(Okio.java:140)
    at okio.AsyncTimeout$2.read(AsyncTimeout.java:237)
    ... 24 common frames omitted
Caused by: java.net.SocketException: Socket closed
    at java.base/java.net.SocketInputStream.read(SocketInputStream.java:183)
    at java.base/java.net.SocketInputStream.read(SocketInputStream.java:140)
    at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:448)
    at java.base/sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:68)
    at java.base/sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1096)
    at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:816)
    ... 26 common frames omitted
  1. okhttp3.internal.http2.StreamResetException: stream was reset: CANCEL
okhttp3.internal.http2.StreamResetException: stream was reset: CANCEL
    at okhttp3.internal.http2.Http2Stream.takeResponseHeaders(Http2Stream.java:153)
    at okhttp3.internal.http2.Http2Codec.readResponseHeaders(Http2Codec.java:125)
    at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:88)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:126)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
    at okhttp3.RealCall.execute(RealCall.java:77)
    at com.foo.fooService.sendRequest(FooService.java:XXX)
    at java.base/java.lang.Thread.run(Thread.java:834)
  1. okhttp3.internal.http2.StreamResetException: stream was reset: REFUSED_STREAM
okhttp3.internal.http2.StreamResetException: stream was reset: REFUSED_STREAM
    at okhttp3.internal.http2.Http2Stream.takeResponseHeaders(Http2Stream.java:153)
    at okhttp3.internal.http2.Http2Codec.readResponseHeaders(Http2Codec.java:125)
    at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:88)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:126)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
    at okhttp3.RealCall.execute(RealCall.java:77)
    at com.foo.fooService.sendRequest(FooService.java:XXX)
    at java.base/java.lang.Thread.run(Thread.java:834)
  1. java.net.SocketTimeoutException: timeout
java.net.SocketTimeoutException: timeout
    at okhttp3.internal.http2.Http2Stream$StreamTimeout.newTimeoutException(Http2Stream.java:593)
    at okhttp3.internal.http2.Http2Stream$StreamTimeout.exitAndThrowIfTimedOut(Http2Stream.java:601)
    at okhttp3.internal.http2.Http2Stream.takeResponseHeaders(Http2Stream.java:146)
    at okhttp3.internal.http2.Http2Codec.readResponseHeaders(Http2Codec.java:125)
    at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:88)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:126)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
    at okhttp3.RealCall.execute(RealCall.java:77)
    at com.foo.fooService.sendRequest(FooService.java:XXX)
    at java.base/java.lang.Thread.run(Thread.java:834)

Question: How can I easily reproduce these three exceptions? What can be changed on either server or client side to avoid these?

Improve this question
2
  • I modified the question. I only want to be able to reproduce these okhttp3 exceptions. Commented Mar 18 at 7:13
  • My Java code is as above. The exceptions occur every now and then. So either my code has to change or the server side. As I have no control over the server side, any mock server that can reproduce these exceptions would surely help as I can ask the server team to change their settings. Commented Mar 18 at 7:51
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