Fix for CVE-2019-17572 in apache/rocketmq (project apache__rocketmq_CVE-2019-17572_4.6.0), commit f8f6fbe4aa7f5dee937e688322628c366b12a552
Fixed file: broker/src/main/java/org/apache/rocketmq/broker/topic/TopicConfigManager.java
Fixed class: TopicConfigManager (lines 43-480)
Fixed method: getSystemTopic (lines 151-152)
Method signature: Set getSystemTopic()