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8284977: MetricsTesterCgroupV2.getLongValueEntryFromFile fails when named value doesn't exist #1379

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8284977: MetricsTesterCgroupV2.getLongValueEntryFromFile fails when named value doesn't exist #1379

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5 changes: 5 additions & 0 deletions test/lib/jdk/test/lib/containers/cgroup/MetricsTesterCgroupV2.java
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Expand Up @@ -121,6 +121,11 @@ private long getLongValueEntryFromFile(String file, String metric) {
Path filePath = Paths.get(UNIFIED.getPath(), file);
try {
String strVal = Files.lines(filePath).filter(l -> l.startsWith(metric)).collect(Collectors.joining());
if (strVal.isEmpty()) {
// sometimes the match for the metric does not exist, e.g. cpu.stat's nr_periods iff the controller
// is not enabled
return UNLIMITED;
}
String[] keyValues = strVal.split("\\s+");
String value = keyValues[1];
return convertStringToLong(value);
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