Hello all, In the class Named AclCommand,configure SimpleAclAuthorizer,but no need call loadCache. now we have 20,000 topics in kafka cluster,everytime I run AclCommand,all these topics's Alcs need to be authed, it will be very slow. The purpose of this optimization is：we can choose to not load the acl of all topics into memory, mainly for adding and deleting permissions.
PR Available here: https://github.com/apache/kafka/pull/7706 KIP Available here: https://cwiki.apache.org/confluence/display/KAFKA/KIP-565%3A+Using+AclCommand%2Cavoid+call+the+global+method+loadcache+in+SimpleAclAuthorizer Issue Available here: https://issues.apache.org/jira/browse/KAFKA-9424 mainly for adding and deleting permissions,we can choose to not load the acl of all topics into memory,then we can add two args "--load-acl-cache" "false" in AclCommand.main;else you don't add these args, it will load the acl cache defaultly. we can choose improve the running time from minutes to less than one second. Thanks, Steven
