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8345684: OperatingSystemMXBean.getSystemCpuLoad() throws NPE #4

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8345684: OperatingSystemMXBean.getSystemCpuLoad() throws NPE #4

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9 changes: 7 additions & 2 deletions src/jdk.management/unix/classes/com/sun/management/internal/OperatingSystemImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -274,8 +274,13 @@ public double getProcessCpuLoad() {
}

private boolean isCpuSetSameAsHostCpuSet() {
if (containerMetrics != null && containerMetrics.getCpuSetCpus() != null) {
return containerMetrics.getCpuSetCpus().length == getHostOnlineCpuCount0();
if (containerMetrics != null) {
// The return value may change (including from non-null to null) and
// the call may involve I/O, so keep the result in a local variable.
int[] cpuSetCpus = containerMetrics.getCpuSetCpus();
if (cpuSetCpus != null) {
return cpuSetCpus.length == getHostOnlineCpuCount0();
}
}
return false;
}
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