how can I sync data between multiple tomcat instances

Question

I want to store my data in java static variables. like store autoCode in Map

private static final PassiveExpiringMap<String, String> authCodeMap = new PassiveExpiringMap<>(1000 * 60 * 60);

how can I sync data between multiple tomcat instances

Answer 1

You will have to use an in memory cache that runs as an external service like redis or Hazelcast to store the data. I would suggest to use Hazelcast, because you are using Java.