in geronimo-metrics-extensions/geronimo-metrics-sigar/src/main/java/org/apache/geronimo/microprofile/metrics/extension/sigar/InitSigar.java [100:114]
private void afterLoad(final String systemProp) {
// ensure it works
final String original = System.getProperty(systemProp);
System.setProperty(systemProp, "-");
try {
testItWorks();
} catch (final Throwable throwable) {
unavailable(throwable.getMessage());
if (original == null) {
System.clearProperty(systemProp);
} else {
System.setProperty(systemProp, original);
}
}
}