When we encounter Authentication is not valid error might be because the user which us trying to delete/modify the ZKnode does not have permissions to do it, please export the JVMFLAG pointing to the jaas file of Hbase {1} For example in this case I understand we are trying to delete the hbase-secure zknode So go to the latest hbase process dir, export the hbase jaas file and then log in into ZKCLI again and run the rmr/deleteall command to delete the ZKnode {1} - export JVMFLAGS=“-Djava.security.auth.login.config=path/to/jaas.conf”
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