ccding commented on a change in pull request #11110:
URL: https://github.com/apache/kafka/pull/11110#discussion_r683573626
##########
File path:
storage/src/main/java/org/apache/kafka/server/log/remote/storage/RemoteLogManagerConfig.java
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@@ -253,9 +253,9 @@ public RemoteLogManagerConfig(AbstractConfig config) {
config.getInt(REMOTE_LOG_READER_THREADS_PROP),
config.getInt(REMOTE_LOG_READER_MAX_PENDING_TASKS_PROP),
config.getString(REMOTE_STORAGE_MANAGER_CONFIG_PREFIX_PROP),
-
config.originalsWithPrefix(config.getString(REMOTE_STORAGE_MANAGER_CONFIG_PREFIX_PROP)),
+
config.originalsWithPrefix(config.getString(REMOTE_STORAGE_MANAGER_CONFIG_PREFIX_PROP)
== null ? "" : config.getString(REMOTE_STORAGE_MANAGER_CONFIG_PREFIX_PROP)),
Review comment:
We will get a null pointer exception when we call `new KafkaConfig()`
without setting `REMOTE_STORAGE_MANAGER_CONFIG_PREFIX_PROP`. E.g.,
https://github.com/apache/kafka/blob/d6f6edd2b17cbaccd4c87bfa66f871a676760044/core/src/test/scala/unit/kafka/server/KafkaConfigTest.scala#L1057
This happens everywhere in the codebase after this change:
https://github.com/apache/kafka/pull/11110/files#diff-cbe6a8b71b05ed22cf09d97591225b588e9fca6caaf95d3b34a43262cfd23aa6R1437-R1438
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