Android : Google maps v2 got stack overflow, when load two maps

Google maps v2 suddenly stopped working since Dec. 2. I am trying to load two maps at the same time. stack becomes over flow. When there is only one map, it works fine. But before Dec.2, I could load and interact with the two maps quite well.

12-06 21:55:11.438: E/SensorManager(13711): thread start

12-06 21:56:09.823: E/AndroidRuntime(13711): FATAL EXCEPTION: main

12-06 21:56:09.823: E/AndroidRuntime(13711): java.lang.NullPointerException

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.maps.api.android.lib6.gmm6.c.f.a(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.maps.api.android.lib6.gmm6.c.c.a(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.maps.api.android.lib6.c.dn.a(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.maps.api.android.lib6.gmm6.c.c.a(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.maps.api.android.lib6.c.el.a(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.android.gms.maps.internal.l.onTransact(SourceFile:83)

12-06 21:56:09.823: E/AndroidRuntime(13711): at android.os.Binder.transact(Binder.java:326)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.android.gms.maps.internal.IGoogleMapDelegate$a$a.moveCamera(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.android.gms.maps.GoogleMap.moveCamera(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at edu.umbc.zoomtest.ContextZoom$3.onCameraChange(ContextZoom.java:241)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.android.gms.maps.GoogleMap$7.onCameraChange(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.android.gms.maps.internal.e$a.onTransact(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at android.os.Binder.transact(Binder.java:326)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.android.gms.maps.internal.af.a(SourceFile:93)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.maps.api.android.lib6.gmm6.c.c.a(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.google.maps.api.android.lib6.gmm6.c.d.run(Unknown Source)

12-06 21:56:09.823: E/AndroidRuntime(13711): at android.os.Handler.handleCallback(Handler.java:615)

12-06 21:56:09.823: E/AndroidRuntime(13711): at android.os.Handler.dispatchMessage(Handler.java:92)

12-06 21:56:09.823: E/AndroidRuntime(13711): at android.os.Looper.loop(Looper.java:137)

12-06 21:56:09.823: E/AndroidRuntime(13711): at android.app.ActivityThread.main(ActivityThread.java:4938)

12-06 21:56:09.823: E/AndroidRuntime(13711): at java.lang.reflect.Method.invokeNative(Native Method)

12-06 21:56:09.823: E/AndroidRuntime(13711): at java.lang.reflect.Method.invoke(Method.java:511)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)

12-06 21:56:09.823: E/AndroidRuntime(13711): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)

12-06 21:56:09.823: E/AndroidRuntime(13711): at dalvik.system.NativeStart.main(Native Method)