Throughput controller causes stack overflow/latency spike towards end of test

**ATan** ([Bug 64103](https://bz.apache.org/bugzilla//show_bug.cgi?id=64103&redirect=false)):
Whenever I have a throughput controller paired with a http sampler, I get the occasional stack overflow error when trying to generate a dashboard report. I've included a basic script of what my test plan looks like, but it basically goes like this:

Thread group - 250 users
-Read value line by line from a csv file
-Include value in http payload in the form of a POST request to a server
-Throughput total executions for 1 Million requests. I want the test to gracefully end and generate dashboard after it fulfills this

More often than not I have an error at the last step. And in addition to that, during the very last step of running this test the latency has a huge spike. From an average max of ~100 ms to sometimes ~900000 ms. I even tested with a different server and its the same behavior.

And for clarity sake, I'm encountering problematic behaviors towards the end of the test when I use a throughput controller. Either the test wraps up cleanly, stack overflows, or has a huge lag spike before the report is created.

I'll try attaching the error message from log in addition to test plan. I've seen similar bug requests involving if statements, but I can confirm there are no explicit if statements in my test plan.

+Java 8
+20GB Heap memory, modified registry timedwaitdelay and maxuserport for max values

Created attachment [Bug.jmx](https://apache.github.io/jmeter-bugzilla-attachments/03/64103/36983/Bug.jmx): Test Plan
Bug.jmx

````xml

false
true



Thread Count
200
=


Throughput
1000000
=


filename
filename.txt
=







continue

false
-1

${Thread Count}
1
false


true



0
false
${Throughput}

ThroughputController.percentThroughput
1.0
1.0




\n
UTF-8
filename
false
false
true
shareMode.group
false
test



false
true
false




200


Assertion.response_code
false
8




OK


Assertion.response_message
false
8

````

Severity: major
OS: