Nomination Evidence: FrankYang0529

Project: apache/kafka Period: 2026-01-27 to 2026-02-26

Summary

FrankYang0529 reviews 8x more PRs than they author (31 reviews, 4 PRs), with 100% consistency (5/5 weeks active), 2 of 4 authored PRs scored as high-complexity.

Highlights

• 44 commits, 4 PRs merged, 31 PRs reviewed, 49 review comments, 1 dev@ messages | https://github.com/apache/kafka/commits?author=FrankYang0529
• Drove PR #19523 (KAFKA-17747: [2/N] Add compute topic and group hash), 61 review rounds: https://github.com/apache/kafka/pull/19523
• Review on PR #21273 (KAFKA-19774: Mechanism to cordon log dirs (KIP-1066)): "Should we also consider only cordonedDirectoriesChange change case? For exampl......" https://github.com/apache/kafka/pull/21273
• PR #19523 (KAFKA-17747: [2/N] Add compute topic and group hash): 24 days to merge: https://github.com/apache/kafka/pull/19523
• Review comment on PR #19523 (KAFKA-17747: [2/N] Add compute topic and group hash): "> I also wonder what is the impact of putting all the data to a byte array before hashing it. Do you have thoughts on th..." https://github.com/apache/kafka/pull/19523

Contribution statistics

Code contributions (GitHub)

• PRs opened: 4
• PRs merged: 4
• Lines added: 151
• Lines deleted: 10
• Commits: 44

Code review

• PRs reviewed: 31
• Review comments given: 49
• Issue comments: 5
  • APPROVED: 17 (54%)
  • CHANGES_REQUESTED: 0 (0%)
  • COMMENTED: 14 (45%)

Mailing list participation (dev@)

• Messages sent: 1
• Threads started: 1
• Threads participated: 1
• Votes cast: 0 (0 binding)
• Threads started:
  • [PR] MINOR: Add 3.9.2 document [kafka-site]

Composite score

Review relationships

People this contributor reviews most

• mingyen066: 11 reviews
• johnny94: 4 reviews
• mimaison: 3 reviews
• tengu-alt: 3 reviews
• Parkerhiphop: 2 reviews
• mmatloka: 2 reviews
• bbejeck: 1 reviews
• highluck: 1 reviews
• erikanderson: 1 reviews
• lianetm: 1 reviews

People who review this contributor's PRs most

• chia7712: 19 reviews
• dajac: 15 reviews
• ijuma: 6 reviews
• mjsax: 3 reviews
• squah-confluent: 3 reviews
• omkreddy: 1 reviews
• frankvicky: 1 reviews
• see-quick: 1 reviews

Consistency

FrankYang0529 was active 5 of 5 weeks in the period (100% consistency), maintaining a 7.8x net reviewer ratio across 20 contributors.

Community health profile

Relational metrics: how this contributor strengthens the community beyond code output.

• Net reviewer ratio: 7.8x
• Interaction breadth: 20 unique contributors (concentration: 35%)
• Newcomer welcoming: 15 reviews on PRs from contributors with 3 or fewer PRs
  • Names: tengu-alt, highluck, erikanderson, jiafu1115, TaiJuWu, Parkerhiphop, johnny94, mmatloka
• Helping ratio: 39% of GitHub comments directed at others' PRs
• Review depth: 0.7 comments/review, 53% questions (21 comments on 31 reviews)
• Stewardship: 49% of work is maintenance (18/37 PRs: 3 authored, 15 reviewed)
• Thread response ratio: 0% of mailing list threads joined are others' threads
• Consistency: 100% (5/5 weeks active)
• Feedback responsiveness: 75% iteration rate, 1.2h median turnaround, 46% reply rate (4 PRs with feedback)

Complexity of authored work

• PRs scored: 4
• High complexity (>= 0.5): 2
• Low complexity (< 0.5): 2
• Average complexity: 0.424

Highest-complexity authored PRs

• PR #19523 (KAFKA-17747: [2/N] Add compute topic and group hash)
  • Complexity score: 0.720
  • Probing ratio: 30.0%
  • Review rounds: 61
  • Probing topics: avoid the extra, magic byte, thread safe, complete byte buffer, reuse this list, declare it before, rather put this, put an empty, error in it, return 0 when, remove the inline
• PR #21541 (MINOR: Add 3.9.2 to system test)
  • Complexity score: 0.500
  • Probing ratio: 16.7%
  • Review rounds: 9

Quality of review contributions

Probing review comments (expressing uncertainty, challenging assumptions): 10

Most significant probing reviews (on highest-complexity PRs)

• PR #21273 (KAFKA-19774: Mechanism to cordon log dirs (KIP-1066), score 0.772)
  • Comment: "Should we also consider only cordonedDirectoriesChange change case? For exampl..."
• PR #21273 (KAFKA-19774: Mechanism to cordon log dirs (KIP-1066), score 0.772)
  • Comment: "This field can be updated. Do we need to add @volatile as `_currentDefaultConf..."
• PR #21273 (KAFKA-19774: Mechanism to cordon log dirs (KIP-1066), score 0.772)
  • Topics: record to quorum
  • Comment: "It looks like this only change value in memory, but doesn't generate a `BrokerRe..."
• PR #19523 (KAFKA-17747: [2/N] Add compute topic and group hash, score 0.720)
  • Topics: avoid the extra
  • Comment: "> I wonder whether it is worth inlining the implementation from Guava or somethi..."
• PR #19523 (KAFKA-17747: [2/N] Add compute topic and group hash, score 0.720)
  • Topics: thread safe
  • Comment: "> I also wonder what is the impact of putting all the data to a byte array befor..."

Highest-judgment review comments (on others' PRs)

(Selected by length, technical content, and presence of questions)

• PR #21340 (KAFKA-20085: Replace verbose version instructions with updateVersion task) | https://github.com/apache/kafka/pull/21340#discussion_r2712594527
  • File: build.gradle
  • "With this change, any developer or CI agent running ./gradlew check will have their local source files silently modified if the version is out of sync. Will this surprise user? How about we remove the dependsOn and add comments to gradle.properties to ask release manager run `./gradlew update"
• PR #19793 (KAFKA-19144 Move DelayedProduce to server module) | https://github.com/apache/kafka/pull/19793#discussion_r2105694458
  • File: core/src/main/scala/kafka/server/ReplicaManager.scala
  • "ditto ```scala val responseStatus = new util.HashMapTopicIdPartition, PartitionResponse entries.foreach { case (topicIdPartition, _) => responseStatus.put(topicIdPartition, new PartitionResponse( Errors.INVALID_REQUIRED_ACKS, LogAppendInfo.UNKNOWN_LOG_APPEND_I"
• PR #19793 (KAFKA-19144 Move DelayedProduce to server module) | https://github.com/apache/kafka/pull/19793#discussion_r2105694257
  • File: core/src/main/scala/kafka/server/ReplicaManager.scala
  • "We use initialProduceStatus to build a Scala map and transfer to Java. Probably, we can build a Java map directly, so we can avoid asJava here. ```scala val produceResponseStatus = new util.HashMapTopicIdPartition, PartitionResponse initialProduceStatus.foreach { case (k, st"
• PR #19306 (KAFKA-18870 Implement describeDelegationToken for controller) | https://github.com/apache/kafka/pull/19306#discussion_r2034702639
  • File: tools/src/main/java/org/apache/kafka/tools/DelegationTokenCommand.java
  • "You cannot specify both --bootstrap-server and --bootstrap-controller as required. This makes result like: > ./bin/kafka-delegation-tokens.sh --bootstrap-controller localhost:9093 --describe Missing required argument "[bootstrap-server]" Please using withOptionalArg and do th"
• PR #21273 (KAFKA-19774: Mechanism to cordon log dirs (KIP-1066)) | https://github.com/apache/kafka/pull/21273#discussion_r2816604750
  • File: metadata/src/main/java/org/apache/kafka/metadata/BrokerRegistration.java
  • "Should we also consider only cordonedDirectoriesChange change case? For example, fenced, inControlledShutdown, and directories are equal, so the function returns and ignores cordonedDirectories change?"

Area focus

Files touched (authored PRs)

• streams/streams-scala/src (20 files)
• vagrant/base.sh (2 files)
• .github/workflows/docker_scan.yml (2 files)
• gradle/dependencies.gradle (2 files)
• docs/streams/developer-guide (2 files)
• tests/docker/Dockerfile (1 files)
• tests/kafkatest/version.py (1 files)
• docs/apis/_index.md (1 files)

Areas reviewed (from PR titles)

• testing (5 PRs)
• metrics (4 PRs)
• storage/log (3 PRs)
• raft (3 PRs)
• kraft (2 PRs)
• consumer (1 PRs)
• metadata (1 PRs)
• controller (1 PRs)