asmhatre
c7eccd1db5
Custom OrderProcessed event, CPU/allocation/lock workloads, a diagnostic endpoint over the JVM's live FlightRecorder state, a JUnit test using the jdk.jfr.Recording API, and nine captured recordings (flagship, mid-flight snapshot, isolated vs concurrent threshold comparisons, and a real dump+stop duplication bug) with their docs/output/*.txt transcripts.
16 lines
848 B
Plaintext
16 lines
848 B
Plaintext
$ java -cp target/classes com.ankurm.jfr.events.BrokenEventPatternDemo
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calls: 200
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exceptions thrown: 41
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events committed: 159
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expected if lossless: 200
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events missing: 41 (== exceptions thrown)
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BrokenEventPattern.processWithoutTryFinally() has no try/finally around
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event.commit(); when riskyStep() throws (about one call in five, by design),
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execution leaves the method from the catch in the demo driver, not from the line
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that would have called commit(). The event threshold was forced to 0 ms for this
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run specifically to rule out "the event was just too fast to pass the default
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threshold" as an alternative explanation -- every one of the 41 missing events is
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attributable to the missing try/finally, not to filtering. No exception, log line,
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or JFR.check output calls this out: the only way to notice is to count.
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