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Problems with DNS resolution

See original GitHub issue

I’ve had this happen to a good 10% of my devices, affecting ~1000 users. However, I cannot seem to reproduce this issue. It only happens when connected over Wifi, and multiple users have confirmed me they weren’t behind any captive portals or anything. They could access the url normally when typing it into a browser. There isn’t any good indicator this is a vendor-specific issue either. My statistics show a majority of samsung devices, grafik but then again, it works flawlessly on my samsung test device. I don’t know what to make of it. Here’s the stack trace:

java.net.UnknownHostException
Unable to resolve host "<valid hostname>": No address associated with hostname
java.net.InetAddress.lookupHostByName (InetAddress.java:394)
java.net.InetAddress.getAllByNameImpl (InetAddress.java:236)
java.net.InetAddress.getAllByName (InetAddress.java:214)
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okhttp3.Dns$1.lookup (Dns.java:40)
okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress (RouteSelector.java:185)
okhttp3.internal.connection.RouteSelector.nextProxy (RouteSelector.java:149)
okhttp3.internal.connection.RouteSelector.next (RouteSelector.java:84)
okhttp3.internal.connection.StreamAllocation.findConnection (StreamAllocation.java:214)
okhttp3.internal.connection.StreamAllocation.findHealthyConnection (StreamAllocation.java:135)
okhttp3.internal.connection.StreamAllocation.newStream (StreamAllocation.java:114)
okhttp3.internal.connection.ConnectInterceptor.intercept (ConnectInterceptor.java:42)
okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147)
okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:121)
okhttp3.internal.cache.CacheInterceptor.intercept (CacheInterceptor.java:93)
okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147)
okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:121)
okhttp3.internal.http.BridgeInterceptor.intercept (BridgeInterceptor.java:93)
okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147)
okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept (RetryAndFollowUpInterceptor.java:126)
okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147)
okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:121)
okhttp3.RealCall.getResponseWithInterceptorChain (RealCall.java:200)
okhttp3.RealCall.execute (RealCall.java:77)
retrofit2.OkHttpCall.execute (OkHttpCall.java:180)
retrofit2.adapter.rxjava2.CallExecuteObservable.subscribeActual (CallExecuteObservable.java:41)
io.reactivex.Observable.subscribe (Observable.java:10151)
retrofit2.adapter.rxjava2.BodyObservable.subscribeActual (BodyObservable.java:34)
io.reactivex.Observable.subscribe (Observable.java:10151)
io.reactivex.internal.operators.observable.ObservableSingleSingle.subscribeActual (ObservableSingleSingle.java:35)
io.reactivex.Single.subscribe (Single.java:2517)
io.reactivex.internal.operators.single.SingleSubscribeOn$SubscribeOnObserver.run (SingleSubscribeOn.java:89)
io.reactivex.Scheduler$1.run (Scheduler.java:131)
io.reactivex.internal.schedulers.ScheduledRunnable.run (ScheduledRunnable.java:59)
io.reactivex.internal.schedulers.ScheduledRunnable.call (ScheduledRunnable.java:51)

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