mimaison commented on PR #15834:
URL: https://github.com/apache/kafka/pull/15834#issuecomment-2112826872
Thanks for the PR.
If I set `inter.broker.protocol.version=3.6-IV2` and multiple log
directories in my broker configuration, it now prevents me from formatting the
storage:
```
bin/kafka-storage.sh format -t $KAFKA_CLUSTER_ID -c
config/kraft/server.properties
[2024-05-15 17:05:31,009] WARN inter.broker.protocol.version is deprecated
in KRaft mode as of 3.3 and will only be read when first upgrading from a KRaft
prior to 3.3. See kafka-storage.sh help for details on setting the
metadata.version for a new KRaft cluster. (kafka.server.KafkaConfig)
Exception in thread "main" java.lang.IllegalArgumentException: requirement
failed: Multiple log directories (aka JBOD) are not supported in the configured
inter.broker.protocol.version 3.0-IV1. Need 3.7-IV2 or higher
```
However, if I specify the metadata version using the `--release-version`
flag of the storage tool, the formatting works and I only get the failure when
I try to start the broker:
```
bin/kafka-storage.sh format -t $KAFKA_CLUSTER_ID -c
config/kraft/server.properties --release-version 3.6
metaPropertiesEnsemble=MetaPropertiesEnsemble(metadataLogDir=Optional.empty,
dirs={/tmp/kraft-combined-logs: EMPTY, /tmp/kraft-combined-logs2: EMPTY})
Formatting /tmp/kraft-combined-logs with metadata.version 3.6-IV2.
Formatting /tmp/kraft-combined-logs with metadata.version 3.6-IV2.
Formatting /tmp/kraft-combined-logs2 with metadata.version 3.6-IV2.
```
Should we ensure the failure always happens at the formatting stage?
I also created https://issues.apache.org/jira/browse/KAFKA-16771 to avoid
printing the "Formatting <...>" log line twice for the first directory.
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