# \[MY-000000\] \[Galera\] failed to open gcomm backend connection: 110 **URL:** \ **Category:** Percona XtraDB Cluster 8.x\ **Created:** [March 22, 2024, 9:39am UTC](https://forums.percona.com/t/my-000000-galera-failed-to-open-gcomm-backend-connection-110/29308 "2024-03-22T09:39:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jay22](https://avatars.discourse-cdn.com/v4/letter/j/bb73d2/32.png) [@Jay22](https://forums.percona.com/u/Jay22)\ **Post date:** [March 22, 2024, 9:39am UTC](https://forums.percona.com/t/my-000000-galera-failed-to-open-gcomm-backend-connection-110/29308/1 "2024-03-22T09:39:39Z")
Please help me to solution of below logs: 2024-03-18T15:25:59.756996+01:00 0 [ERROR] [MY-000000] [Galera] failed to open gcomm backend connection: 110: failed to reach primary view (pc.wait\_prim\_timeout): 110 (Connection timed out) at gcomm/src/pc.cpp:connect():161 2024-03-18T15:25:59.757011+01:00 0 [ERROR] [MY-000000] [Galera] gcs/src/gcs\_core.cpp:gcs\_core\_open():219: Failed to open backend connection: -110 (Connection timed out) 2024-03-18T15:26:00.757287+01:00 0 [Note] [MY-000000] [Galera] gcomm: terminating thread 2024-03-18T15:26:00.757337+01:00 0 [Note] [MY-000000] [Galera] gcomm: joining thread 2024-03-18T15:26:00.757481+01:00 0 [ERROR] [MY-000000] [Galera] gcs/src/gcs.cpp:gcs\_open():1811: Failed to open channel ‘kpn-zsmart-secint’ at ‘gcomm://10.150.53.2’: -110 (Connection timed out) 2024-03-18T15:26:00.757495+01:00 0 [ERROR] [MY-000000] [Galera] gcs connect failed: Connection timed out 2024-03-18T15:26:00.757505+01:00 0 [ERROR] [MY-000000] [WSREP] Provider/Node (gcomm://10.150.53.2) failed to establish connection with cluster (reason: 7) 2024-03-18T15:26:00.757514+01:00 0 [ERROR] [MY-010119] [Server] Aborting 2024-03-18T15:26:00.757603+01:00 0 [Note] [MY-010120] [Server] Binlog end 2024-03-18T15:26:00.757778+01:00 0 [Note] [MY-010733] [Server] Shutting down plugin ‘daemon\_keyring\_proxy\_plugin’ 2024-03-18T15:26:00.758212+01:00 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.32-24.2) Percona XtraDB Cluster (GPL), Release rel24, Revision 2119e75, WSREP version 26.1.4.3. 2024-03-18T15:26:00.759166+01:00 0 [ERROR] [MY-010065] [Server] Failed to shutdown components infrastructure. ---
**Author:** ![Denis\_Subbota](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/denis_subbota/32/23607_2.png) [@Denis\_Subbota](https://forums.percona.com/u/Denis_Subbota)\ **Post date:** [March 25, 2024, 7:27am UTC](https://forums.percona.com/t/my-000000-galera-failed-to-open-gcomm-backend-connection-110/29308/2 "2024-03-25T07:27:50Z")
Hello [Jay22](https://forums.percona.com/u/Jay22), Please make sure that connectivity and firewall rules are configured with respect to the requirements [Install Percona XtraDB Cluster - Percona XtraDB Cluster](https://docs.percona.com/percona-xtradb-cluster/8.0/install-index.html#ports-required) Regards, Denis Subbota. Managed Services, Percona. ---
**Author:** ![Jay22](https://avatars.discourse-cdn.com/v4/letter/j/bb73d2/32.png) [@Jay22](https://forums.percona.com/u/Jay22)\ **Post date:** [November 26, 2024, 12:30pm UTC](https://forums.percona.com/t/my-000000-galera-failed-to-open-gcomm-backend-connection-110/29308/3 "2024-11-26T12:30:24Z")
Hi Denis, we already using the percona XtraDB cluster solutions.when the OS patching happens mysql services was already enabled for auto restart after reboot. But still service not started automatically.so we have to manually make the cluster down and needs to restart cluster.There are 2 nodes in cluster 1 is main and other is DR node.so when patching happens the DR node joins automatically but for main node we are facing the issue .its do not restart and whn we checked mysqld logs it shows only [Galera] failed to open gcomm backend connection: 110: failed to reac h primary view (pc.wait\_prim \_timeout): 110 (Connection timed out) [Galera] gcs/src/gcs.cpp:gcs\_open( ):1811: Failed to open channel ‘kpn -zsmart-prd8-cdr’ at ‘gcomm://x.x., x.x.’: -110 (Connection timed out) [MY-000000] [Galera] gcs connect failed: Connection timed out 2024-11-26T07:11:48.041394+01:00 0 [ERROR] [MY-000000] stablish connection with cluster (reason: 7)