michaeljmarshall commented on a change in pull request #13609:
URL: https://github.com/apache/pulsar/pull/13609#discussion_r778420958
##########
File path:
pulsar-broker/src/main/java/org/apache/pulsar/broker/loadbalance/impl/LinuxBrokerHostUsageImpl.java
##########
@@ -108,9 +112,9 @@ public void calculateBrokerHostUsage() {
SystemResourceUsage usage = new SystemResourceUsage();
long now = System.currentTimeMillis();
double elapsedSeconds = (now - lastCollection) / 1000d;
- double cpuUsage = getTotalCpuUsage(elapsedSeconds);
+ double cpuUsage = (elapsedSeconds <= 0) ? 0 :
getTotalCpuUsage(elapsedSeconds);
- if (lastCollection == 0L) {
+ if (lastCollection == 0L || elapsedSeconds <= 0) {
Review comment:
We could also just add another `if` block here that returns when
`elapsedSeconds <= 0` is true. That wouldn't require changing any of the other
parts of this method.
##########
File path:
pulsar-broker/src/main/java/org/apache/pulsar/broker/loadbalance/impl/LinuxBrokerHostUsageImpl.java
##########
@@ -128,6 +132,9 @@ public void calculateBrokerHostUsage() {
lastCollection = System.currentTimeMillis();
this.usage = usage;
usage.setCpu(new ResourceUsage(cpuUsage, totalCpuLimit));
+
+
executorService.schedule(catchingAndLoggingThrowables(this::calculateBrokerHostUsage),
Review comment:
If there is an exception in the above method, we'll miss calling this
`schedule`, which would stop broker host usage calculations.
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