Github user ivmaykov commented on the pull request: https://github.com/apache/zookeeper/commit/232232e7f338a9eca440d89dcfc8ed22e0336e60#commitcomment-31143262 In zookeeper-server/src/main/java/org/apache/zookeeper/common/X509Util.java: In zookeeper-server/src/main/java/org/apache/zookeeper/common/X509Util.java on line 489: ZKConfig will get the value from system properties. In the next PR this is changed - you can create a X509Util with a ZKConfig parameter, in which case it will be used here.
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