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8368670: Deadlock in JFR on event register + class load #27592

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8368670: Deadlock in JFR on event register + class load #27592

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7f8cd99
Initial
Oct 1, 2025
0ec8f1b
Use volatile
Oct 1, 2025
a00d5c1
Fix
Oct 1, 2025
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2 changes: 1 addition & 1 deletion src/jdk.jfr/share/classes/jdk/jfr/internal/MetadataRepository.java
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Expand Up @@ -291,7 +291,7 @@ private byte[] getBinaryRepresentation() {
}
}

synchronized boolean isEnabled(String eventName) {
boolean isEnabled(String eventName) {
return settingsManager.isEnabled(eventName);
}

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2 changes: 1 addition & 1 deletion src/jdk.jfr/share/classes/jdk/jfr/internal/SettingsManager.java
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Expand Up @@ -129,7 +129,7 @@ public void finish() {
}
}

private Map<String, InternalSetting> availableSettings = new LinkedHashMap<>();
private volatile Map<String, InternalSetting> availableSettings = new LinkedHashMap<>();

void setSettings(List<Map<String, String>> activeSettings, boolean writeSettingEvents) {
// store settings so they are available if a new event class is loaded
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