TestJVMCrash.java

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 * accompanied this code).
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package jdk.jfr.api.consumer.streaming;

import java.time.Duration;
import java.time.Instant;
import java.util.concurrent.atomic.AtomicInteger;

import jdk.jfr.consumer.EventStream;

/**
 * @test
 * @summary Test that a stream ends/closes when an application crashes.
 * @key jfr
 * @library /lib /
 * @modules jdk.jfr jdk.attach java.base/jdk.internal.misc
 *
 * @run main/othervm jdk.jfr.api.consumer.streaming.TestJVMCrash
 */
public class TestJVMCrash {

    public static void main(String... args) throws Exception {
        int id = 1;
        while (true) {
            TestProcess process = new TestProcess("crash-application-" + id++);
            AtomicInteger eventCounter = new AtomicInteger();
            try (EventStream es = EventStream.openRepository(process.getRepository())) {
                // Start from first event in repository
                es.setStartTime(Instant.EPOCH);
                es.onEvent(e -> {
                    if (eventCounter.incrementAndGet() == TestProcess.NUMBER_OF_EVENTS) {
                        process.crash();
                    }
                });
                es.startAsync();
                // If crash corrupts chunk in repository, retry in 30 seconds
                es.awaitTermination(Duration.ofSeconds(30));
                if (eventCounter.get() == TestProcess.NUMBER_OF_EVENTS) {
                    return;
                }
                System.out.println("Incorrect event count. Retrying...");
            }
        }
    }
}