Problem: Connection interruption will break idempotent file route with REDIS

Prerequisites

Start redis container.
docker run -p 6379:6379 -d redis:4.0

Test

• Execute createFiles.sh
  This will create the folder structure with 500 files in each folder.
• Start spring boot app
• Simulate connection failure. I block port 6379 for 4 seconds.

./blockPortMac.sh
or
./blockPortLinux.sh

• Exception:

org.springframework.data.redis.RedisConnectionFailureException: java.net.SocketTimeoutException: Read timed out; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: Read timed out

• Then add new files to the folders with:
  ./addMoreFiles.sh
• The script has created 4 more files, 1 in each folder.
  At this point, files are being copied that should not be copied anymore because they are member of the key key1. And it keeps copying in an endless loop.