环境：Android 7.0、Android 7.1
引擎版本：1.4.2
状态：每天 10 次/ 2000 人
用 XMLHttpRequest 进行 HTTP 请求。
log 如下：
java.lang.NullPointerException: Attempt to get length of null array
at com.squareup.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:187)
at com.squareup.okhttp.internal.http.RouteSelector.nextProxy(RouteSelector.java:156)
at com.squareup.okhttp.internal.http.RouteSelector.next(RouteSelector.java:98)
at com.squareup.okhttp.internal.http.HttpEngine.createNextConnection(HttpEngine.java:344)
at com.squareup.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:327)
at com.squareup.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:245)
at com.squareup.okhttp.Call.getResponse(Call.java:267)
at com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:224)
at com.avos.avoscloud.PaasClient$RequestStatisticInterceptor.intercept(PaasClient.java:922)
at com.squareup.okhttp.Call$ApplicationInterceptorChain.proceed(Call.java:221)
at com.squareup.okhttp.Call.getResponseWithInterceptorChain(Call.java:195)
at com.squareup.okhttp.Call.access$100(Call.java:34)
at com.squareup.okhttp.Call$AsyncCall.execute(Call.java:162)
at com.squareup.okhttp.internal.NamedRunnable.run(NamedRunnable.java:33)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at java.lang.Thread.run(Thread.java:776)