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android-studiologcat

Unexpected logcat with idle Android phone

I am attempting to debug an error using logcat in Android Studio on my testing device, a Galaxy s9 plus running Pie. Suddenly I have a really weird and annoying logcat output making it hard to veiw events: 

2019-03-01 10:49:15.024 17645-17645/? I/DBG_FMMDM: [6.9.22][Line:55][a] xdmGetAccountRegistration : true
2019-03-01 10:49:15.024 17645-17645/? I/DBG_FMMDM: [6.9.22][Line:47][onDestroy] XDM ALERT REAMINED, SO RESTART DM SERVICE
2019-03-01 10:49:15.024 17645-17645/? I/DBG_FMMDM: [6.9.22][Line:2][a] FMM Application Start !
2019-03-01 10:49:15.028 17645-17645/? I/DBG_FMMDM: [6.9.22][Line:5][onCreate] XDM Service onCreate
2019-03-01 10:49:15.029 17645-17645/? I/DBG_FMMDM: [6.9.22][Line:20][onCreate] Device ID is null!!, service not start !
2019-03-01 10:49:15.030 17645-17645/? I/DBG_FMMDM: [6.9.22][Line:3][onStartCommand] 
2019-03-01 10:49:15.030 17645-17645/? I/DBG_FMMDM: [6.9.22][Line:2][onDestroy] onDestroy
2019-03-01 10:49:15.037 17645-17645/? I/DBG_FMMDM: [6.9.22][Line:30][a] Samsung Account Exist !!!
2019-03-01 10:49:15.038 17645-17645/? E/DBG_FMMDM: Warning!!! [6.9.22][Line:15][a] java.lang.NullPointerException: Attempt to read from field 'com.fmm.dm.b.a.x com.fmm.dm.b.a.ac.g' on a null object reference

This output runs over and over, to the point that my logcat is completely populated and there is no way to scroll up to see past outputs.

I have no idea what I/DBG_FMMDM is and why it is attempting to read from com.fmm.dm.b.a.x (whatever that is).

Has anyone seen this type of output before?

My testing device is a Galaxy s9 plus running Pie

Solution

  • Normally you would want to filter your logs - for example, filter your logs so that you will only see your current application related logs.
    Now, if you are debugging error I would recommend to go to your logcat and filter the results by error(it just makes thing a lot comfortable).

    In this image, you can see where to filter your log results:
    enter image description here

    As you can see you can choose what do you want to filter by using this menu.