[KAFKA-17722] Fix "this-escape" compiler warnings (BrokerTopicMetrics) for JDK 23

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Assignee: Cheng-Yan Wang
• Reporter: Chia-Ping Tsai
• Created: 08/Oct/24 11:53
• Updated: 12/Oct/24 16:04
• Resolved: 12/Oct/24 16:04

Description

> Task :storage:compileJava FAILED
/root/kafka/storage/src/main/java/org/apache/kafka/storage/log/metrics/BrokerTopicMetrics.java:62: warning: [this-escape] possible 'this' escape before subclass is fully initialized
        this(Optional.empty(), remoteStorageEnabled);
            ^
/root/kafka/storage/src/main/java/org/apache/kafka/storage/log/metrics/BrokerTopicMetrics.java:106: warning: [this-escape] previous possible 'this' escape happens here via invocation
            metricGaugeTypeMap.put(RemoteStorageMetrics.REMOTE_COPY_LAG_BYTES_METRIC.getName(), new GaugeWrapper(RemoteStorageMetrics.REMOTE_COPY_LAG_BYTES_METRIC.getName()));
                                                                                                ^
/root/kafka/storage/src/main/java/org/apache/kafka/storage/log/metrics/BrokerTopicMetrics.java:66: warning: [this-escape] possible 'this' escape before subclass is fully initialized
        this(Optional.of(name), remoteStorageEnabled);
            ^
/root/kafka/storage/src/main/java/org/apache/kafka/storage/log/metrics/BrokerTopicMetrics.java:106: warning: [this-escape] previous possible 'this' escape happens here via invocation
            metricGaugeTypeMap.put(RemoteStorageMetrics.REMOTE_COPY_LAG_BYTES_METRIC.getName(), new GaugeWrapper(RemoteStorageMetrics.REMOTE_COPY_LAG_BYTES_METRIC.getName()));

Issue Links

• links to: GitHub Pull Request #17439