sijie commented on a change in pull request #8961:
URL: https://github.com/apache/pulsar/pull/8961#discussion_r544828698
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File path:
pulsar-zookeeper-utils/src/main/java/org/apache/pulsar/zookeeper/ZkIsolatedBookieEnsemblePlacementPolicy.java
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@@ -147,6 +157,11 @@ private ZooKeeperCache getAndSetZkCache(Configuration
conf) {
Map<String, byte[]> customMetadata, List<BookieId> currentEnsemble,
BookieId bookieToReplace, Set<BookieId> excludeBookies)
throws BKNotEnoughBookiesException {
+ // parse the ensemble placement policy from the custom metadata, if it
is present, we will apply it to
+ // the isolation groups for filtering the bookies.
+ Optional<EnsemblePlacementPolicyConfig> ensemblePlacementPolicyConfig =
+ getEnsemblePlacementPolicyConfig(customMetadata);
+
ensemblePlacementPolicyConfig.ifPresent(this::fillIsolationGroupWithEnsemblePlacementPolicyConfig);
Review comment:
The change here has concurrent access issues. Because it resets the
primary and secondary isolation groups. It will cause replacing bookies using
the wrong group.
Also, I don't think the logic here is correct.
I think we should record the `group` information in the custom metadata.
when replacing a bookie, we need to lookup the bookies in the same group. If it
is not an easy change to make here, we should try to build a new bookie
ensemble placement policy to achieve this goal and can be used for autorecovery.
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