acl Archives - Java / Cloud / BigData

November 8, 2022November 8, 2022
Hadoop, Java, Spark
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Spark’s AccessControlException: Permission denied

One day you may face this error: Full exception text is: Firstly, you need to check that user from which your Spark working on, has home folder under /user like that: /user/John_Doe. If you already have that folder, try to grant access to /user dir. If you unable to grant access to that directory or […]

April 7, 2021August 10, 2021
Hadoop, Java, ZooKeeper
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How ZooKeeper ACL works

In this post I will describe the basic principles of how ACL works in ZooKeeper. ACL is not set recursively and is not inherited by the child nodes. If we have a read-only ACL for /path1/path2 or /path1/path2/path3, then deleting /path1 will fail, regardless of AСL of /path1. Several ACL records can be set on […]

December 27, 2020March 21, 2021
Java, SSL, ZooKeeper
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ZooKeeper x509 certificates ACL

The documentation states that setting an ACL via the ZooKeeper CLI usually works like this: In the case of the x509 scheme, the Authenticated ID for the user is the DN string of their certificate. In confirmation of this, when a user connects via a certificate, there is a line in the server log: Now, […]