[Bug] #1252 seems causing `KeyError: 'data_time'` when evaluation interval is a multiple of logging interval

By default, log_config.interval=50. When evaluation.interval={50,200}, there is an error KeyError: ‘data_time’ (error log pasted below). When evaluation.interval=120, the error does not occur at first several iterations (because the evaluation is quite long, I was unable to try testing when it reaches iteration 600, but I guess that it might trigger the error when it reaches there). Not sure if there is anything that I am not doing correctly. Thank you for your great work and effort in maintaining this!

  File "/home/haotian/code/mmcv/mmcv/runner/hooks/logger/text.py", line 96, in _log_info
    log_str += f'time: {log_dict["time"]:.3f}, ' \
KeyError: 'data_time'
Traceback (most recent call last):
  File "./tools/train.py", line 223, in <module>
    main()
  File "./tools/train.py", line 219, in main
    meta=meta)
  File "/home/haotian/code/mmdetection3d/mmdet3d/apis/train.py", line 25, in train_model
    meta=meta)
  File "/home/haotian/code/mmsegmentation/mmseg/apis/train.py", line 116, in train_segmentor
    runner.run(data_loaders, cfg.workflow)
  File "/home/haotian/code/mmcv/mmcv/runner/iter_based_runner.py", line 133, in run
    iter_runner(iter_loaders[i], **kwargs)
  File "/home/haotian/code/mmcv/mmcv/runner/iter_based_runner.py", line 66, in train
    self.call_hook('after_train_iter')
  File "/home/haotian/code/mmcv/mmcv/runner/base_runner.py", line 307, in call_hook
    getattr(hook, fn_name)(self)
  File "/home/haotian/code/mmcv/mmcv/runner/hooks/logger/base.py", line 152, in after_train_iter
    self.log(runner)
  File "/home/haotian/code/mmcv/mmcv/runner/hooks/logger/text.py", line 177, in log
    self._log_info(log_dict, runner)
  File "/home/haotian/code/mmcv/mmcv/runner/hooks/logger/text.py", line 96, in _log_info
    log_str += f'time: {log_dict["time"]:.3f}, ' \

[zhouzaida]

hi @haotian-liu , you should also lower the priority of EvalHook in your codebase. Please refer to https://github.com/open-mmlab/mmsegmentation/pull/766

[haotian-liu]

Thanks, I have opened the pull request: https://github.com/open-mmlab/mmdetection/pull/5882.