TensorBoard: gracefully handle deleted event files

as far as i can tell this is exactly the same as this issue https://github.com/tensorflow/tensorflow/issues/3267

if i delete files from the logdir while tensorboard is running i get things like

E0911 11:27:19.441699 139989077399296 plugin_event_multiplexer.py:226] Unable to reload accumulator 'srresnet_voc_2x': [Errno 2] No such file or directory: b'/home/maksim/data/tensorboard/srresnet_voc_2x/events.out.tfevents.1568215513.maksim-desktop.105092.0'
E0911 11:27:24.447706 139989077399296 plugin_event_multiplexer.py:226] Unable to reload accumulator 'srresnet_voc_2x': [Errno 2] No such file or directory: b'/home/maksim/data/tensorboard/srresnet_voc_2x/events.out.tfevents.1568215513.maksim-desktop.105092.0'
E0911 11:27:29.453577 139989077399296 plugin_event_multiplexer.py:226] Unable to reload accumulator 'srresnet_voc_2x': [Errno 2] No such file or directory: b'/home/maksim/data/tensorboard/srresnet_voc_2x/events.out.tfevents.1568215513.maksim-desktop.105092.0'
E0911 11:27:34.459517 139989077399296 plugin_event_multiplexer.py:226] Unable to reload accumulator 'srresnet_voc_2x': [Errno 2] No such file or directory: b'/home/maksim/data/tensorboard/srresnet_voc_2x/events.out.tfevents.1568215513.maksim-desktop.105092.0'

i'm using tb-nightly==1.15.0a20190911 through pytorch.

i'm not sure when reaping is supposed to happen e.g. as in https://github.com/tensorflow/tensorflow/issues/3267#issuecomment-292911229
or how to manually force

WARNING:tensorflow:Deleting accumulator 'run1/test'
WARNING:tensorflow:Deleting accumulator 'run1'
WARNING:tensorflow:Deleting accumulator 'run2/test'
WARNING:tensorflow:Deleting accumulator 'run2'