Unable to extract the trust manager

Hi, after upgrading from OkHttp 3.0.1 to 3.1.0 I get the following stack trace and crash after calling build() to create a OkHttpClient.

java.lang.IllegalStateException: Unable to extract the trust manager on okhttp3.internal.Platform$Android@1d8cf999, sslSocketFactory is class com.google.android.gms.org.conscrypt.KitKatPlatformOpenSSLSocketAdapterFactory
                                                                        at okhttp3.OkHttpClient.<init>(OkHttpClient.java:187)
                                                                        at okhttp3.OkHttpClient.<init>(OkHttpClient.java:60)
                                                                        at okhttp3.OkHttpClient$Builder.build(OkHttpClient.java:719)

This issue was not present in 3.0.1.

Here’s where the crash happens:

OkHttpClient.Builder builder = new OkHttpClient.Builder()
                    .connectTimeout(10, TimeUnit.SECONDS)
                    .writeTimeout(10, TimeUnit.SECONDS)
                    .readTimeout(30, TimeUnit.SECONDS);

            OkHttpClient client = builder.build();

[JeffreyCA]

I experienced this error while using a custom SocketFactory. I realized I didn’t add all the necessary ProGuard rules. I added the following to fix the issue:

-keepclassmembers class * implements javax.net.ssl.SSLSocketFactory {
    private final javax.net.ssl.SSLSocketFactory delegate;
}

In my SocketFactory class, I had the following field:

private final SSLSocketFactory delegate;

So adjust the ProGuard rule accordingly. E.g, the access modifiers like private, final, etc. as well as the field name (delegate) should match exactly as written in the class file.

[pgg]

Wildfly 10, java8, and any version > 3.0.1: Unable to extract the trust manager on okhttp3.internal.Platform@10c89bdf, sslSocketFactory is class sun.security.ssl.SSLSocketFactoryImpl