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https://issues.apache.org/jira/browse/KAFKA-6640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16399498#comment-16399498
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ASF GitHub Bot commented on KAFKA-6640:
---------------------------------------
hachikuji closed pull request #4694: KAFKA-6640; Improve efficiency of
KafkaAdminClient.describeTopics()
URL: https://github.com/apache/kafka/pull/4694
This is a PR merged from a forked repository.
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the sake of provenance:
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diff --git
a/clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java
b/clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java
index 36cbe6cad00..e455b9ce81c 100644
--- a/clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java
+++ b/clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java
@@ -1276,15 +1276,16 @@ public DescribeTopicsResult describeTopics(final
Collection<String> topicNames,
void handleResponse(AbstractResponse abstractResponse) {
MetadataResponse response = (MetadataResponse)
abstractResponse;
// Handle server responses for particular topics.
+ Cluster cluster = response.cluster();
+ Map<String, Errors> errors = response.errors();
for (Map.Entry<String, KafkaFutureImpl<TopicDescription>>
entry : topicFutures.entrySet()) {
String topicName = entry.getKey();
KafkaFutureImpl<TopicDescription> future =
entry.getValue();
- Errors topicError = response.errors().get(topicName);
+ Errors topicError = errors.get(topicName);
if (topicError != null) {
future.completeExceptionally(topicError.exception());
continue;
}
- Cluster cluster = response.cluster();
if (!cluster.topics().contains(topicName)) {
future.completeExceptionally(new
InvalidTopicException("Topic " + topicName + " not found."));
continue;
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> Improve efficiency of KafkaAdminClient.describeTopics()
> -------------------------------------------------------
>
> Key: KAFKA-6640
> URL: https://issues.apache.org/jira/browse/KAFKA-6640
> Project: Kafka
> Issue Type: Improvement
> Reporter: Dong Lin
> Assignee: Dong Lin
> Priority: Major
>
> Currently in KafkaAdminClient.describeTopics(), for each topic in the
> request, an complete map of cluster and errors will be constructed for every
> topic and partition. This unnecessarily increases the complexity ofÂ
> describeTopics() to O(n^2).
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