Recently , I inherited an Org with huge customization , which enqueue 100+ Batch Jobs in few scenario. Now, don’t ask me why ?
I remember, few years back, Salesforce had limit of 5 Apex Batch that can be executed at a time, but we had expectation and demand !!! Salesforce introduced Flex queue and we can have 100 Batch apex waiting to be executed, still we are not happy. After all, human is wanting animal.
After 100 Batch apex, all jobs were failing with error System.AsyncException You have exceeded the limit of 100 Jobs in the flex queue. As I explained my life previously in this post, I had to fix this issue as well.
Right way to fix it was to analyze existing code, perform code review, why do we need even customization etc.. However, time was crucial and I had to do something quickly.
Below framework was used to fix the issue