One approach to avoid the 25k history event limit is to add a choice state in your loop that takes in a counter or boolean and decides to exit the loop or break up the workflow into subflows to avoid this limit.
{
"Comment": "An example looping while avoiding the 25k event history limit.",
"StartAt": "FirstState",
"States": {
"FirstState": {
"Type": "Task",
"Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:FUNCTION_NAME",
"Next": "ChoiceState"
},
"ChoiceState": {
"Type" : "Choice",
"Choices": [
{
"Variable": "$.breakOutOfLoop",
"BooleanEquals": true,
"Next": "StartNewExecution"
}
],
"Default": "LoopProcessor"
},
"LoopProcessor": {
"Type" : "Task",
"Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:ProcessWork",
"Next": "ChoiceState"
},
"StartNewExecution": {
"Type" : "Task",
"Resource": "arn:aws:lambda:REGION:ACCOUNT_ID:function:StartNewLooperExecution",
"Next": "FinalState"
},