Java – Android Retrofit 2 gzip error

I’m using Retrofit2 to develop an Android app. There is a problem with gzip, here is the exception stack.
I don’t know exactly where the exception happened. Any suggestions are appreciated. Thank you.

Unknown exception
java.io.EOFException
   at okio. RealBufferedSource.require(RealBufferedSource.java:64)
   at okio. GzipSource.consumeHeader(GzipSource.java:114)
   at okio. GzipSource.read(GzipSource.java:73)
   at okio. RealBufferedSource.request(RealBufferedSource.java:71)
   at okhttp3.logging.HttpLoggingInterceptor.intercept(HttpLoggingInterceptor.java:225)
   at okhttp3. RealCall$ApplicationInterceptorChain.proceed(RealCall.java:187)
   at okhttp3. RealCall.getResponseWithInterceptorChain(RealCall.java:160)
   at okhttp3. RealCall.execute(RealCall.java:57)
   at retrofit2. OkHttpCall.execute(OkHttpCall.java:174)
   at retrofit2. ExecutorCallAdapterFactory$ExecutorCallbackCall.execute(ExecutorCallAdapterFactory.java:89)
   at com.hello.de.aloha.domain.interactor.RetrofitServerInteraction.callVerifyOauthToken(RetrofitServerInteraction.java:424)
   at com.hello.de.aloha.domain.security.SecurityHandshake.validateOAuthToken(SecurityHandshake.java:178)
   at com.hello.de.aloha.domain.security.SecurityHandshake.requestOAuthToken(SecurityHandshake.java:150)
   at com.hello.de.aloha.domain.security.SecurityHandshake.authenticate(SecurityHandshake.java:122)
   at com.hello.de.aloha.domain.security.SecurityHandshake.challenge(SecurityHandshake.java:70)
   at com.hello.de.aloha.domain.interceptor.SecurityInterceptor.determineNewToken(SecurityInterceptor.java:152)
   at com.hello.de.aloha.domain.interceptor.SecurityInterceptor.intercept(SecurityInterceptor.java:89)
   at okhttp3. RealCall$ApplicationInterceptorChain.proceed(RealCall.java:187)
   at com.hello.de.aloha.domain.interceptor.SendCookieInterceptor.intercept(SendCookieInterceptor.java:46)
   at okhttp3. RealCall$ApplicationInterceptorChain.proceed(RealCall.java:187)
   at com.hello.de.aloha.domain.interceptor.ReceiveCookiesInterceptor.intercept(ReceiveCookiesInterceptor.java:43)
   at okhttp3. RealCall$ApplicationInterceptorChain.proceed(RealCall.java:187)
   at com.hello.de.aloha.domain.interceptor.HttpParamInterceptor.intercept(HttpParamInterceptor.java:75)
   at okhttp3. RealCall$ApplicationInterceptorChain.proceed(RealCall.java:187)
   at okhttp3.logging.HttpLoggingInterceptor.intercept(HttpLoggingInterceptor.java:203)
   at okhttp3. RealCall$ApplicationInterceptorChain.proceed(RealCall.java:187)
   at okhttp3. RealCall.getResponseWithInterceptorChain(RealCall.java:160)
   at okhttp3. RealCall.access$100(RealCall.java:30)
   at okhttp3. RealCall$AsyncCall.execute(RealCall.java:127)
   at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
   at java.lang.Thread.run(Thread.java:818)

I checked the code in GzipSource:

    private void consumeHeader() throws IOException {
         Read the 10-byte header. We peek at the flags byte first so we know if we
         need to CRC the entire header. Then we read the magic ID1ID2 sequence.
         We can skip everything else in the first 10 bytes.
        // +---+---+---+---+---+---+---+---+---+---+
        // | ID1| ID2| CM | FLG|     MTIME     | XFL| OS | (more-->)
        // +---+---+---+---+---+---+---+---+---+---+
        source.require(10);
        ...
    }

  @Override public void require(long byteCount) throws IOException {
    if (!request(byteCount)) throw new EOFException();
  }

@Override public boolean request(long byteCount) throws IOException {
    if (byteCount < 0) throw new IllegalArgumentException("byteCount < 0: " + byteCount);
    if (closed) throw new IllegalStateException("closed");
    while (buffer.size < byteCount) {
      if (source.read(buffer, Segment.SIZE) == -1) return false;
    }
    return true;
  }

Your response data appears to violate the gzip format. So it is recommended to check the response data first. You may also want to check your incoming request header (i.e. accept: gzip) that affects the format of the response data.