chia7712 commented on a change in pull request #9758:
URL: https://github.com/apache/kafka/pull/9758#discussion_r584165033
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File path:
clients/src/main/java/org/apache/kafka/common/requests/FetchResponse.java
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@@ -57,238 +56,39 @@
* the fetch offset after the index lookup
* - {@link Errors#UNKNOWN_SERVER_ERROR} For any unexpected errors
*/
-public class FetchResponse<T extends BaseRecords> extends AbstractResponse {
-
- public static final long INVALID_HIGHWATERMARK = -1L;
+public class FetchResponse extends AbstractResponse {
+ public static final long INVALID_HIGH_WATERMARK = -1L;
public static final long INVALID_LAST_STABLE_OFFSET = -1L;
public static final long INVALID_LOG_START_OFFSET = -1L;
public static final int INVALID_PREFERRED_REPLICA_ID = -1;
private final FetchResponseData data;
- private final LinkedHashMap<TopicPartition, PartitionData<T>>
responseDataMap;
+ // we build responseData when needed.
+ private LinkedHashMap<TopicPartition, FetchResponseData.PartitionData>
responseData = null;
Review comment:
jira: https://issues.apache.org/jira/browse/KAFKA-12385
> you can use a volatile field and synchronize on the assignment if still
null.
updated
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