# WSREP: Failed to read uuid:seqno from joiner script (Operation not permitted)

**URL:** <https://forums.percona.com/t/wsrep-failed-to-read-uuid-seqno-from-joiner-script-operation-not-permitted/20965>\
**Category:** Percona XtraDB Cluster 5.x\
**Tags:** mysql, percona\
**Created:** [March 27, 2023, 10:06am UTC](https://forums.percona.com/t/wsrep-failed-to-read-uuid-seqno-from-joiner-script-operation-not-permitted/20965 "2023-03-27T10:06:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ishank\_Bansal](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/ishank_bansal/32/5474_2.png) [@Ishank\_Bansal](https://forums.percona.com/u/Ishank_Bansal)\
**Post date:** [March 27, 2023, 10:06am UTC](https://forums.percona.com/t/wsrep-failed-to-read-uuid-seqno-from-joiner-script-operation-not-permitted/20965/1 "2023-03-27T10:06:25Z")

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Hi Guys, I am running MySQL cluster of 3 nodes using percona XtraDB cluster. It is running fine since very long. But now I need to expand the cluster by adding one more node to it. But while adding the node I am getting the below error:-

WSREP\_SST: [ERROR] Cleanup after exit with status:1 (2023-03-27 09:48:52)  
2023-03-27 09:48:52 9364 [ERROR] WSREP: Process completed with error: wsrep\_sst\_xtrabackup-v2 --role ‘joiner’ --address ‘10.51.53.111’ --datadir ‘/var/lib/mysql/’ --defaults-file ‘/etc/mysql/my.cnf’ --defaults-group-suffix ‘’ --parent ‘9364’ --mysqld-version ‘5.6.51-91.0-56’ --binlog ‘mysql-bin’ : 1 (Operation not permitted)  
2023-03-27 09:48:52 9364 [ERROR] WSREP: Failed to read uuid:seqno from joiner script.  
2023-03-27 09:48:52 9364 [ERROR] WSREP: SST script aborted with error 1 (Operation not permitted)  
2023-03-27 09:48:52 9364 [ERROR] WSREP: SST failed: 1 (Operation not permitted)  
2023-03-27 09:48:52 9364 [ERROR] Aborting

Can anyone Please point me into what i might be doing wrong here?

[my\_cnf.txt](https://forums.percona.com/uploads/short-url/yywAjOjrdE58rAL33shleYJbviI.txt) (3.7 KB)

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<div class="post-metadata">

**Author:** ![matthewb](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/matthewb/32/34_2.png) [@matthewb](https://forums.percona.com/u/matthewb)\
**Post date:** [March 27, 2023, 4:50pm UTC](https://forums.percona.com/t/wsrep-failed-to-read-uuid-seqno-from-joiner-script-operation-not-permitted/20965/2 "2023-03-27T16:50:30Z")

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This is 5.6? This version has been dead and unsupported for 4+ years. Make sure you have xtrabackup 2.4 installed on the new node before starting MySQL.