Video Freeze and buffering, DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.

04-02 03:40:27.441  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.449  5920  5920 D EventLogger: rendererReady [eventTime=14235.07, mediaPos=300.64, window=0, period=0, rendererIndex=1, audio, true]
04-02 03:40:27.451  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.454  5920  5920 D EventLogger: state [eventTime=14235.07, mediaPos=300.64, window=0, period=0, READY]
04-02 03:40:27.454  5920  5920 D AnalyticsListener: PlaybackStateChanged: 3
04-02 03:40:27.455  5920  5920 D EventLogger: isPlaying [eventTime=14235.07, mediaPos=300.64, window=0, period=0, true]
04-02 03:40:27.455  5920  5920 D AnalyticsListener: IsPlayingChanged: true
04-02 03:40:27.462  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.472  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.481  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.491  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.501  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.512  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.523  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.532  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.543  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.554  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.564  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.573  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.584  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.593  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.604  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.614  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.624  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.633  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.643  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.654  5920  6533 W DefaultLoadControl: Target buffer size reached with less than 500ms of buffered media data.
04-02 03:40:27.657  5920  5920 D EventLogger: rendererReady [eventTime=14235.28, mediaPos=300.64, window=0, period=0, rendererIndex=1, audio, false]
04-02 03:40:27.659  5920  5920 D EventLogger: state [eventTime=14235.28, mediaPos=300.64, window=0, period=0, BUFFERING]
04-02 03:40:27.659  5920  5920 D AnalyticsListener: PlaybackStateChanged: 2
04-02 03:40:27.660  5920  5920 D EventLogger: isPlaying [eventTime=14235.28, mediaPos=300.64, window=0, period=0, false]

any idea, why this is happening, continuously i am getting above logs repeateadly..

even i'm using in built LoadControl itself.

ISSUE: start a playback, after few hours , sometime with in an hour, video is freezing and buffering is observed( very fast).