title: monkey test java.io.filenotfoundexception
body: <pre><code>java.io.FileNotFoundException: /data/data/com.forward.test/files/1458096313000.stacktrace: open failed: ENOENT (No such file or directory)
      at libcore.io.IoBridge.open(IoBridge.java:416)
      at java.io.FileInputStream.&lt;init&gt;(FileInputStream.java:78)
      at android.app.ContextImpl.openFileInput(ContextImpl.java:643)
      at android.content.ContextWrapper.openFileInput(ContextWrapper.java:159)
      at org.acra.CrashReportPersister.load(SourceFile:65)
      at org.acra.BaseCrashReportDialog.sendCrash(SourceFile:72)
      at org.acra.CrashReportDialog.onClick(SourceFile:141)
      at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
      at android.os.Handler.dispatchMessage(Handler.java:99)
      at android.os.Looper.loop(Looper.java:137)
      at android.app.ActivityThread.main(ActivityThread.java:4745)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:511)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
      at dalvik.system.NativeStart.main(Native Method)
  Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
      at libcore.io.Posix.open(Native Method)
      at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
      at libcore.io.IoBridge.open(IoBridge.java:400)
  </code></pre>
  
  <p>how to know the exception thrown where in my code? from the log, may guess the file is not created, but how to locate which file</p>