mxm commented on code in PR #710:
URL:
https://github.com/apache/flink-kubernetes-operator/pull/710#discussion_r1391538017
##########
flink-kubernetes-operator/src/main/java/org/apache/flink/kubernetes/operator/autoscaler/ConfigMapStore.java:
##########
@@ -67,19 +67,14 @@ protected Optional<String> getSerializedState(
}
protected void removeSerializedState(KubernetesJobAutoScalerContext
jobContext, String key) {
- getConfigMap(jobContext)
- .ifPresentOrElse(
- configMap -> configMap.getData().remove(key),
- () -> {
- throw new IllegalStateException(
- "The configMap isn't created, so the
remove is unavailable.");
- });
+ getConfigMap(jobContext).ifPresent(configMap ->
configMap.getData().remove(key));
}
public void flush(KubernetesJobAutoScalerContext jobContext) {
Optional<ConfigMap> configMapOpt = cache.get(jobContext.getJobKey());
if (configMapOpt == null || configMapOpt.isEmpty()) {
LOG.debug("The configMap isn't updated, so skip the flush.");
+ // Do not flush if there are no updates.
Review Comment:
Thanks for adding the tests. You are right that the retrieval will always go
to Kubernetes. The current implementation has some bugs with the bookkeeping to
minimize the number of API calls. It does make more requests than necessary.
I've rewrote the implementation to minimize the number of times we go to
Kubernetes. We only retrieve once now on lookup. If the ConfigMap does not
exist, we will only create the ConfigMap once we flush back any changes.
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