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Lulu WuandLuna Wei
68bc219266
Summary: Why ignore for now? - It only happen once during initialization and doesn't cause any breakages for RNTester - The race condition happens in Android System code which is hard to tackle: ```Exception in native call java.lang.NullPointerException: java.lang.NullPointerException at com.facebook.jni.NativeRunnable.run(Native Method) at android.os.Handler.handleCallback(Handler.java:958) at android.os.Handler.dispatchMessage(Handler.java:99) at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:30) at android.os.Looper.loopOnce(Looper.java:205) at android.os.Looper.loop(Looper.java:294) at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:235) at java.lang.Thread.run(Thread.java:1012) ``` From stack trace message.callback is checked in ```at android.os.Handler.dispatchMessage(Handler.java:99)``` but becomes null in ```at android.os.Handler.handleCallback(Handler.java:958)``` [Android source code](https://l.facebook.com/l.php?u=https%3A%2F%2Fandroid.googlesource.com%2Fplatform%2Fframeworks%2Fbase%2F%2B%2Fmaster%2Fcore%2Fjava%2Fandroid%2Fos%2FHandler.java&h=AT1aQS0Vmknao8kLbYE_hhLj1G3idUf69jFQE3ZLAqjrbcMX4OdQUV1dzZpAkAvLaZ9HAOanpsKCC8z59Ce9XJa6cOhQL2L95gM9iMrSr7FbrpTKPLKbWjDmTz89WUL2pQprnBVKyA8) of Handler. Reviewed By: cortinico Differential Revision: D51550240 fbshipit-source-id: 6288e196da1da88a37f5c69bfce82e3e09c6f106