Jackie-Jiang commented on a change in pull request #3758: Better handle NPE
from getting instance config
URL: https://github.com/apache/incubator-pinot/pull/3758#discussion_r251672911
##########
File path:
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java
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@@ -284,8 +285,13 @@ public HelixAdmin getHelixAdmin() {
* @return Helix instance config
*/
@Nonnull
- public InstanceConfig getHelixInstanceConfig(@Nonnull String instanceId) {
+ public InstanceConfig getHelixInstanceConfig(@Nonnull String instanceId)
throws InstanceNotFoundException {
ZNRecord znRecord = _cacheInstanceConfigsDataAccessor.get("/" +
instanceId, null, AccessOption.PERSISTENT);
+ if (znRecord == null) {
Review comment:
I prefer returning `null` if instance does not exist, and the caller can
handle null value accordingly (similar to Map.get() behavior).
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