구글플레이에서 다운 받은 어플이 2015년 넘어오면서 실행하기만 하면  

'어플이 중지되었습니다.' 멘트 나오고,  '신고', '확인'만 무한반복입니다... 왜 그런 걸까요??

아래는 신고했을때 전달되는 'Stack trace'입니다.. 

고수님들의 조언 부탁드립니다..


java.lang.IllegalArgumentException: Unknown pattern character 'Y'
at java.text.SimpleDateFormat.validatePatternCharacter(SimpleDateFormat.java:314)
at java.text.SimpleDateFormat.validatePattern(SimpleDateFormat.java:303)
at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:356)
at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:249)
at com.nksoft.ezting.internal.DateUtil.getTimeStamp(DateUtil.java:145)
at com.nksoft.ezting.ui.talk.TalkListFragment$TalkListAdapter.getSocialHighlightInfo(TalkListFragment.java:333)
at com.nksoft.ezting.ui.talk.TalkListFragment$TalkListAdapter.getView(TalkListFragment.java:325)
at android.widget.HeaderViewListAdapter.getView(HeaderViewListAdapter.java:230)
at android.widget.AbsListView.obtainView(AbsListView.java:2733)
at android.widget.ListView.makeAndAddView(ListView.java:1811)
at android.widget.ListView.fillDown(ListView.java:697)
at android.widget.ListView.fillSpecific(ListView.java:1360)
at android.widget.ListView.layoutChildren(ListView.java:1619)
at android.widget.AbsListView.onLayout(AbsListView.java:2546)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:429)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at com.nksoft.ezting.widget.slidingmenu.CustomViewAbove.onLayout(CustomViewAbove.java:243)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
at android.view.View.layout(View.java:15664)
at android.view.ViewGroup.layout(ViewGroup.java:4869)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2246)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1968)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1200)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6401)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:803)
at android.view.Choreographer.doCallbacks(Choreographer.java:603)
at android.view.Choreographer.doFrame(Choreographer.java:573)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:789)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5335)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
at dalvik.system.NativeStart.main(Native Method)