kevin-wu24 commented on code in PR #20707:
URL: https://github.com/apache/kafka/pull/20707#discussion_r2487783869
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metadata/src/main/java/org/apache/kafka/controller/QuorumController.java:
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@@ -1022,7 +1021,22 @@ public void
handleLoadSnapshot(SnapshotReader<ApiMessageAndVersion> reader) {
Batch<ApiMessageAndVersion> batch = reader.next();
long offset = batch.lastOffset();
List<ApiMessageAndVersion> messages = batch.records();
-
+ if (bootstrapMetadata == null) {
+ if
(reader.snapshotId().equals(Snapshots.BOOTSTRAP_SNAPSHOT_ID)) {
+ // For bootstrap snapshots, extract feature
levels from all data records
+ if (batch.controlRecords().isEmpty()) {
+ System.out.println("DEBUG: Extracting
bootstrap metadata from " + messages.size() + " records");
+ bootstrapMetadata =
BootstrapMetadata.fromRecords(messages, "bootstrap");
+ System.out.println("DEBUG: Bootstrap
metadata extracted: " + bootstrapMetadata);
+ }
Review Comment:
This is the wrong if condition. We should check `!batch.records.isEmpty`.
If the 0-0.checkpoint does not have metadata records, AND `bootstrapMetadata
== null` at this point, we should throw an `IllegalStateException`, because we
cannot construct `bootstrapMetadata`.
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