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Android: Unable to handle UnknownHostException [wi

2019-08-20 12:29发布

问题:

I've got an Android app which has been in production for some time. I've received a fatal report to Firebase (log is below) but it's not clear to me how to avoid it next time.

I've found similar stack trace here java.net.UnknownHostException Unable to resolve host "accounts.google.com": No address associated with hostname while inserting rows in bigquery but they were able resolved it with:

<uses-permission android:name="android.permission.INTERNET" />

But that's not my case.

For network communication I use:

  • Retrofit 2
  • okhttp 3
  • rxjava2 adapter for Retrofit 2

With this settings all errors end up in onError function in rx subscribe. I handle UnknownHostException in all HTTP calls but even if I didn't it should report non-fatal as the worst case.

I don't know how to reproduce this bug. The stack trace is not very helpful as it doesn't point me anywhere to my application.

Any ideas on what to do to reproduce the bug and any other insights will be much apprechiated.

This is the stack trace:

Exception java.net.UnknownHostException: Unable to resolve host "rest.mywebsite.com": No address associated with hostname
java.net.InetAddress.lookupHostByName (InetAddress.java:470)
java.net.InetAddress.getAllByNameImpl (InetAddress.java:252)
java.net.InetAddress.getAllByName (InetAddress.java:215)
okhttp3.Dns$1.lookup (Dns.java)
okhttp3.internal.connection.RouteSelector.hasNext (RouteSelector.java)
<OR>.connectFailed (RouteSelector.java)
<OR>.resetNextProxy (RouteSelector.java)
<OR>.resetNextInetSocketAddress (RouteSelector.java)
<OR>.getHostString (RouteSelector.java)
okhttp3.internal.connection.RouteSelector.nextProxy (RouteSelector.java)
okhttp3.internal.connection.RouteSelector.next (RouteSelector.java)
okhttp3.internal.connection.StreamAllocation.newStream (StreamAllocation.java)
<OR>.findHealthyConnection (StreamAllocation.java)
<OR>.findConnection (StreamAllocation.java)
<OR>.streamFinished (StreamAllocation.java)
<OR>.codec (StreamAllocation.java)
<OR>.deallocate (StreamAllocation.java)
<OR>.streamFailed (StreamAllocation.java)
<OR>.acquire (StreamAllocation.java)
okhttp3.internal.connection.StreamAllocation.newStream (StreamAllocation.java)
<OR>.findHealthyConnection (StreamAllocation.java)
<OR>.findConnection (StreamAllocation.java)
<OR>.streamFinished (StreamAllocation.java)
<OR>.codec (StreamAllocation.java)
<OR>.deallocate (StreamAllocation.java)
<OR>.streamFailed (StreamAllocation.java)
<OR>.acquire (StreamAllocation.java)
okhttp3.internal.connection.StreamAllocation.newStream (StreamAllocation.java)
<OR>.findHealthyConnection (StreamAllocation.java)
<OR>.findConnection (StreamAllocation.java)
<OR>.streamFinished (StreamAllocation.java)
<OR>.codec (StreamAllocation.java)
<OR>.deallocate (StreamAllocation.java)
<OR>.streamFailed (StreamAllocation.java)
<OR>.acquire (StreamAllocation.java)
okhttp3.internal.connection.ConnectInterceptor.intercept (ConnectInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.cache.CacheInterceptor.intercept (CacheInterceptor.java)
<OR>.stripBody (CacheInterceptor.java)
<OR>.maybeCache (CacheInterceptor.java)
<OR>.cacheWritingResponse (CacheInterceptor.java)
<OR>.combine (CacheInterceptor.java)
<OR>.isEndToEnd (CacheInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.BridgeInterceptor.intercept (BridgeInterceptor.java)
<OR>.cookieHeader (BridgeInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RetryAndFollowUpInterceptor.cancel (RetryAndFollowUpInterceptor.java)
<OR>.setCallStackTrace (RetryAndFollowUpInterceptor.java)
<OR>.intercept (RetryAndFollowUpInterceptor.java)
<OR>.createAddress (RetryAndFollowUpInterceptor.java)
<OR>.recover (RetryAndFollowUpInterceptor.java)
<OR>.isRecoverable (RetryAndFollowUpInterceptor.java)
<OR>.followUpRequest (RetryAndFollowUpInterceptor.java)
<OR>.sameConnection (RetryAndFollowUpInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.logging.HttpLoggingInterceptor.setLevel (HttpLoggingInterceptor.java)
<OR>.intercept (HttpLoggingInterceptor.java)
<OR>.isPlaintext (HttpLoggingInterceptor.java)
<OR>.bodyEncoded (HttpLoggingInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.RealCall.getResponseWithInterceptorChain (RealCall.java)
okhttp3.RealCall$AsyncCall.execute (RealCall.java)
okhttp3.internal.NamedRunnable.run (NamedRunnable.java)
java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1113)
java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:588)
java.lang.Thread.run (Thread.java:818)

Caused by android.system.GaiException: android_getaddrinfo failed: EAI_NODATA (No address associated with hostname)
libcore.io.Posix.android_getaddrinfo (Posix.java)
libcore.io.ForwardingOs.android_getaddrinfo (ForwardingOs.java:55)
java.net.InetAddress.lookupHostByName (InetAddress.java:451)
java.net.InetAddress.getAllByNameImpl (InetAddress.java:252)
java.net.InetAddress.getAllByName (InetAddress.java:215)
okhttp3.Dns$1.lookup (Dns.java)
okhttp3.internal.connection.RouteSelector.hasNext (RouteSelector.java)
<OR>.connectFailed (RouteSelector.java)
<OR>.resetNextProxy (RouteSelector.java)
<OR>.resetNextInetSocketAddress (RouteSelector.java)
<OR>.getHostString (RouteSelector.java)
okhttp3.internal.connection.RouteSelector.nextProxy (RouteSelector.java)
okhttp3.internal.connection.RouteSelector.next (RouteSelector.java)
okhttp3.internal.connection.StreamAllocation.newStream (StreamAllocation.java)
<OR>.findHealthyConnection (StreamAllocation.java)
<OR>.findConnection (StreamAllocation.java)
<OR>.streamFinished (StreamAllocation.java)
<OR>.codec (StreamAllocation.java)
<OR>.deallocate (StreamAllocation.java)
<OR>.streamFailed (StreamAllocation.java)
<OR>.acquire (StreamAllocation.java)
okhttp3.internal.connection.StreamAllocation.newStream (StreamAllocation.java)
<OR>.findHealthyConnection (StreamAllocation.java)
<OR>.findConnection (StreamAllocation.java)
<OR>.streamFinished (StreamAllocation.java)
<OR>.codec (StreamAllocation.java)
<OR>.deallocate (StreamAllocation.java)
<OR>.streamFailed (StreamAllocation.java)
<OR>.acquire (StreamAllocation.java)
okhttp3.internal.connection.StreamAllocation.newStream (StreamAllocation.java)
<OR>.findHealthyConnection (StreamAllocation.java)
<OR>.findConnection (StreamAllocation.java)
<OR>.streamFinished (StreamAllocation.java)
<OR>.codec (StreamAllocation.java)
<OR>.deallocate (StreamAllocation.java)
<OR>.streamFailed (StreamAllocation.java)
<OR>.acquire (StreamAllocation.java)
okhttp3.internal.connection.ConnectInterceptor.intercept (ConnectInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.cache.CacheInterceptor.intercept (CacheInterceptor.java)
<OR>.stripBody (CacheInterceptor.java)
<OR>.maybeCache (CacheInterceptor.java)
<OR>.cacheWritingResponse (CacheInterceptor.java)
<OR>.combine (CacheInterceptor.java)
<OR>.isEndToEnd (CacheInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.BridgeInterceptor.intercept (BridgeInterceptor.java)
<OR>.cookieHeader (BridgeInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RetryAndFollowUpInterceptor.cancel (RetryAndFollowUpInterceptor.java)
<OR>.setCallStackTrace (RetryAndFollowUpInterceptor.java)
<OR>.intercept (RetryAndFollowUpInterceptor.java)
<OR>.createAddress (RetryAndFollowUpInterceptor.java)
<OR>.recover (RetryAndFollowUpInterceptor.java)
<OR>.isRecoverable (RetryAndFollowUpInterceptor.java)
<OR>.followUpRequest (RetryAndFollowUpInterceptor.java)
<OR>.sameConnection (RetryAndFollowUpInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.logging.HttpLoggingInterceptor.setLevel (HttpLoggingInterceptor.java)
<OR>.intercept (HttpLoggingInterceptor.java)
<OR>.isPlaintext (HttpLoggingInterceptor.java)
<OR>.bodyEncoded (HttpLoggingInterceptor.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.internal.http.RealInterceptorChain.request (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.proceed (RealInterceptorChain.java)
<OR>.sameConnection (RealInterceptorChain.java)
okhttp3.RealCall.getResponseWithInterceptorChain (RealCall.java)
okhttp3.RealCall$AsyncCall.execute (RealCall.java)
okhttp3.internal.NamedRunnable.run (NamedRunnable.java)
java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1113)
java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:588)
java.lang.Thread.run (Thread.java:818)

The phone was disconnected from network and it happend on Android 6.0.1.

回答1:

The problem caused a nested Rx call. When I unsubscribed from one Rx call, the nested one still lived and caused the crash.