question: protected void onSendSuccess ( RecordBuffer < R > buffer ) { sendSuccess . incrementAndGet ( ) ; logger . trace ( "{}:{} Send SUCCESS" , name ( ) , buffer ) ; try { checkpointer . saveCheckpoint ( buffer ) ; } catch ( Exception e ) { logger . error ( "{}:{} Error in onSendSuccess" , name ( ) , buffer , e ) ; } }
target:  This method should not raise any exceptions.