rebuild-tables gives "TimeoutError: ResourceRequest timed out"

[napunapu]

Occasionally the rebuild-tables script gives the following error with a large dataset (e.g. Kliffa's 5500 participants):

 Error: TimeoutError: ResourceRequest timed out. Exiting.
 TimeoutError: ResourceRequest timed out
     at ResourceRequest._fireTimeout (/app/node_modules/generic-pool/lib/ResourceRequest.js:62:17)
     at Timeout.bound (/app/node_modules/generic-pool/lib/ResourceRequest.js:8:15)
     at ontimeout (timers.js:498:11)
     at tryOnTimeout (timers.js:323:5)
     at Timer.listOnTimeout (timers.js:290:5)

Obviously reducing database access by for example leaving out allergy handling alleviates the problem.

Most likely the real solution is to use a pool of limited size for database access. An example is given at sequelize/sequelize#7884 (lingz's comment on the bottom of the page).