Frequently Asked Questions ============================ 1. Cannot connect to the MySQL server """"""""""""""""""""""""""""""""""""""" **Error in .local(drv, ...) :** **Failed to connect to database: Error: Can't initialize character set unknown (path: compiled_in)** :: Calls: dbConnect -> dbConnect -> .local -> .Call Execution halted [Tue Mar 10 19:40:15 2020] Error in rule download_dataset: jobid: 531 output: data/raw/p60/locations_raw.csv RuleException: CalledProcessError in line 20 of /home/ubuntu/rapids/rules/preprocessing.snakefile: Command 'set -euo pipefail; Rscript --vanilla /home/ubuntu/rapids/.snakemake/scripts/tmp_2jnvqs7.download_dataset.R' returned non-zero exit status 1. File "/home/ubuntu/rapids/rules/preprocessing.snakefile", line 20, in __rule_download_dataset File "/home/ubuntu/anaconda3/envs/moshi-env/lib/python3.7/concurrent/futures/thread.py", line 57, in run Shutting down, this might take some time. Exiting because a job execution failed. Look above for error message **Solution:** Please make sure the ``MY_GROUP`` in ``config.yaml`` and ``.env`` are the same. 2. Cannot start mysql for linux via ``brew services start mysql`` """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" use the following code instead: ``mysql.server start`` 3. Every time I run ``snakemake -R download_dataset`` all rules are executed """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" This is expected behavior. The advantage of using ``snakemake`` under the hood is that every time a file containing data is modified every rule that depends on that file will be re-executed to update their results. In this case, since ``download_dataset`` updates all the raw data, every single rule that depends on those raw files will be executed. 4. Got an error like ``Table XXX doesn't exist`` while running the download_dataset rule. """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" :: Error in .local(conn, statement, ...) : could not run statement: Table 'db_name.table_name' doesn't exist Calls: colnames ... .local -> dbSendQuery -> dbSendQuery -> .local -> .Call Execution halted **Solution:** Please make sure your database do have table with the same name of SENSORS list in config.yaml file.