brandboat commented on code in PR #19803:
URL: https://github.com/apache/kafka/pull/19803#discussion_r2106213940
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metadata/src/main/java/org/apache/kafka/metadata/MetadataCache.java:
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@@ -148,56 +147,53 @@ DescribeTopicPartitionsResponseData describeTopicResponse(
boolean ignoreTopicsWithExceptions);
static Cluster toCluster(String clusterId, MetadataImage image) {
- Map<Integer, List<Node>> brokerToNodes = new HashMap<>();
- image.cluster().brokers().values().stream()
- .filter(broker -> !broker.fenced())
- .forEach(broker -> brokerToNodes.put(broker.id(), broker.nodes()));
+ Map<Integer, Node> nodesById =
image.cluster().brokers().values().stream()
+ .collect(Collectors.toMap(BrokerRegistration::id, broker ->
broker.nodes().get(0)));
Review Comment:
> Fixes a bug where fenced brokers result in NPE.
Like I mentioned in the PR description, this result in a
NullPointerException.
Filtering out the fenced broker while Partition itself still includes that
fenced broker in replicas can trigger the NPE as we already filter them out...
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