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scylladb/docs/troubleshooting/change-ownership.rst

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ScyllaDB Fails to Start Due to Wrong Ownership Problems
========================================================
In cases where a ScyllaDB node fails to start because there is improper ownership, the following steps will help.
Phenomena
^^^^^^^^^
ScyllaDB node fails to start.
In cases where the ScyllaDB node fails to start, check ScyllaDB :doc:`logs </getting-started/logging/>`. If you see the following error message:
Could not access ``<PATH>: Permission denied std::system_error (error system:13, Permission denied)``.
For example:
.. code-block:: shell
Jul 01 07:31:48 ip-172-16-12-198 scylla[12189]: [shard 0] init - Could not access /var/lib/scylla/commitlog: std::system_error (error system:13, Permission denied)
Jul 01 07:31:48 ip-172-16-12-198 scylla[12189]: [shard 0] init - Could not access /var/lib/scylla/data: std::system_error (error system:13, Permission denied)
Jul 01 07:31:48 ip-172-16-12-198 scylla[12189]: [shard 0] seastar - Exiting on unhandled exception: std::system_error (error system:13, Permission denied)
Problem
^^^^^^^
The data directories ``/var/lib/scylla/data`` and ``/var/lib/scylla/commitlog`` exist but are not owned by the ScyllaDB user.
For example:
.. code-block:: shell
[centos@ip-172-16-12-132 scylla]$ ls /var/lib/scylla/data
total 4
drwxr-xr-x 2 root root 4096 Jun 18 09:37 commitlog
drwxr-xr-x 7 root root 97 Jun 18 09:37 data
In this example, the user root is the owner of the directories.
Solution
^^^^^^^^
1. Change the data directory ownership.
.. code-block:: shell
sudo chown scylla:scylla /var/lib/scylla/data
.. code-block:: shell
sudo chown scylla:scylla /var/lib/scylla/commitlog
2. Verify that the change completed successfully
.. code-block:: shell
[centos@ip-172-16-12-132 scylla]$ ls /var/lib/scylla/data
total 4
drwxr-xr-x 2 scylla scylla 4096 Jun 18 09:37 commitlog
drwxr-xr-x 7 scylla scylla 97 Jun 18 09:37 data
3. Start ScyllaDB node.
.. include:: /rst_include/scylla-commands-start-index.rst
4. Verify ScyllaDB node is working
.. include:: /rst_include/scylla-commands-status-index.rst
.. include:: /troubleshooting/_common/ts-return.rst