No snapshot data when running local experiment

[Mao Yifu]

I have successfully built images for quickjs, libarchive, etc, and run local experiment using

PYTHONPATH=. python3 experiment/run_experiment.py \
                                          --experiment-config run.config \
                                          --benchmarks quickjs_eval-2020-01-05 libarchive_libarchive_fuzzer \
                                          --experiment-name test--0 \
                                          --fuzzers aflplusplus \
                                          -mc 4 -rc 4

The run.config file:

# The number of trials of a fuzzer-benchmark pair.
trials: 10

# The amount of time in seconds that each trial is run for.
# 1 day = 24 * 60 * 60 = 86400
max_total_time: 600

# The location of the docker registry.
# FIXME: Support custom docker registry.
# See https://github.com/google/fuzzbench/issues/777
docker_registry: gcr.io/fuzzbench

# The local experiment folder that will store most of the experiment data.
# Please use an absolute path.
experiment_filestore: /tmp/experiment-data

# The local report folder where HTML reports and summary data will be stored.
# Please use an absolute path.
report_filestore: /tmp/report-data

# Flag that indicates this is a local experiment.
local_experiment: true

Then the output just repeats

INFO:root:Reading experiment data from db.                                                                                                                    
INFO:root:Done reading experiment data from db.                                                                                                               
WARNING:root:No snapshot data.                                                                                                                                
INFO:root:Finding trials to schedule.                                          
INFO:root:Starting trials.                                                                                                                                    
INFO:root:Started 0 trials.                                                    
INFO:root:Reading experiment data from db.                                                                                                                    
INFO:root:Done reading experiment data from db.                                                                                                               
WARNING:root:No snapshot data.                                                                                                                                
INFO:root:Finding trials to schedule.                                                                                                                         
INFO:root:Starting trials.                                                                                                                                    
INFO:root:Started 0 trials.
INFO:root:Measuring all trials.
INFO:root:Measuring all trials.
INFO:root:Reading experiment data from db.
INFO:root:Done reading experiment data from db.
WARNING:root:No snapshot data.

I pressed Ctrl+C and inspected the dirs in the container, experiment-folders, measurement-folders and reports are all empty.

On the host, I have

/tmp/experiment-data/                                                          
├── local.db                                                                   
├── test--0  
│   ├── coverage-binaries
│   │   ├── coverage-build-libarchive_libarchive_fuzzer.tar.gz
│   │   └── coverage-build-quickjs_eval-2020-01-05.tar.gz
│   └── input
│       ├── config      
│       │   └── experiment.yaml    
│       └── src.tar.gz

However, there is nothing under /tmp/report-data/. I wonder where went wrong.