sodonnel commented on code in PR #4599:
URL: https://github.com/apache/ozone/pull/4599#discussion_r1173566475
##########
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/container/replication/RatisUnderReplicationHandler.java:
##########
@@ -217,7 +217,18 @@ private List<DatanodeDetails> getSources(
}
})
.filter(r -> !pendingDeletion.contains(r.getDatanodeDetails()))
- .sorted((r1, r2) -> r2.getSequenceId().compareTo(r1.getSequenceId()))
+ .collect(Collectors.toList());
+
+ // We should replicate only the max available sequence ID, as replicas with
+ // earlier sequence IDs may be stale copies.
+ long maxSequenceId = availableSources.stream()
+ .map(r -> {
+ Long seqId = r.getSequenceId();
+ return seqId == null ? Long.valueOf(0L) : seqId;
+ }).max(Long::compareTo).orElse(0L);
+
+ return availableSources.stream()
+ .filter(r -> r.getSequenceId() == maxSequenceId)
Review Comment:
Ah, ok. Thanks for the suggested change. I have implemented that and pushed
a new commit.
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