rajat315315 opened a new issue, #6734:
URL: https://github.com/apache/jmeter/issues/6734
### Expected behavior
## Description
Currently in `JMeterThread.java`, execution loops for `PreProcessor`s
(`runPreProcessors`) and `PostProcessor`s (`runPostProcessors`) do not wrap
individual element processing in `try-catch` blocks.
If any `PreProcessor` or `PostProcessor` throws an unhandled
`RuntimeException` (e.g. `NullPointerException`, `IndexOutOfBoundsException`,
or malformed extraction error):
1. **Processor Execution Aborts**: The `for` loop in `runPreProcessors` /
`runPostProcessors` immediately terminates, skipping all subsequent processors
attached to the same sampler.
2. **Sampling Pipeline Bypass**: Uncaught exceptions in post-processors
bypass downstream steps in `executeSamplePackage` including
`checkAssertions()`, listener notifications (`notifyListeners`), and compiler
resource cleanup (`compiler.done(pack)`).
By contrast, assertion processing in `JMeterThread.processAssertion()`
explicitly wraps each assertion in `try-catch (Exception | JMeterError e)` to
log errors and allow remaining pipeline elements to execute.
## Expected Behavior
When a `PreProcessor` or `PostProcessor` throws a runtime exception:
- The error should be logged with the element's name and stack trace.
- The thread should continue executing remaining `PreProcessor`s or
`PostProcessor`s.
- Sample assertions, listener notifications, and compiler cleanup should
execute normally.
### Actual behavior
An exception in a single processor breaks out of the loop, skipping all
remaining processors, assertions, and test element cleanup.
### Steps to reproduce the problem
In `src/core/src/main/java/org/apache/jmeter/threads/JMeterThread.java`:
```java
private static void runPostProcessors(List<? extends PostProcessor>
extractors) {
for (PostProcessor ex : extractors) {
TestBeanHelper.prepare((TestElement) ex);
ex.process(); // Uncaught RuntimeException breaks loop and caller
pipeline
}
}
### JMeter Version
6.0.0-SNAPSHOT
### Java Version
JDK 17 / JDK 21
### OS Version
_No response_
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