Android：无法处理 UnknownHostException [使用 Retrofit 2、okhttp3、rxandroid 2]

Question

我有一个 Android 应用程序，它已经投入生产一段时间了。我收到了 Firebase 的 fatal 报告（日志在下方），但我不清楚下次如何避免它。

我在这里发现了类似的堆栈跟踪 java.net.UnknownHostException Unable to resolve host "accounts.google.com": No address associated with hostname while inserting rows in bigquery 但他们能够通过以下方式解决它：

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

但这不是我的情况。

对于网络通信我使用：

• 改造 2
• okhttp 3
• 用于 Retrofit 2 的 rxjava2 适配器

使用此设置，所有错误都会在 rx 订阅的 onError 函数中结束。我在所有 HTTP 调用中处理 UnknownHostException，但即使我没有处理，它也应该报告 non-fatal 作为最坏的情况。

我不知道如何重现这个错误。堆栈跟踪不是很有用，因为它没有指向我的应用程序的任何地方。

任何关于如何重现错误的想法和任何其他见解都将非常感谢。

这是堆栈跟踪：

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.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.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)

phone 与网络断开连接，发生在 Android 6.0.1。

Answer 1

问题导致了嵌套的 Rx 调用。当我取消订阅一个 Rx 调用时，嵌套的调用仍然存在并导致崩溃。