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MariaDB Galera Cluster is a synchronous multi-master cluster.

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Error with GaleraCluster> [ERROR] WSREP: gcs / src / gcs_group.cpp: gcs_group_handle_join_msg (): 736: Will never receive state. Need to abort [on hold]

I made a cluster with GaleraCluster using 3 virtual machines with Debian 9 and mariadb 10.1 database. The replication works well using rsync method, even if a node is dropped when it recovers, it ...
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1answer
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Read after write in Galera

I am facing a issue with 3 node galera cluster where the read doesn't return any records even when the write has been commited. Below are the steps which can happen from multiple servers. 1>Server A ...
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A database with MyISAM tables on Galera cluster and perform an ALTER TABLE, will that change be replicated?

I've inherited a Galera cluster with DBs that are ENGINE = MyISAM. I know that by default, MyISAM tables are not replicated in Galera cluster. I'm not interested in "experimental support" within ...
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1answer
11 views

all gradestate.dat seqno: -1 why?

All my 3 nodes in mariadb galera cluster seqno is -1 and when i restart the whole cluster i need to start with --wsrep_new_cluster just to start the other nodes. can anyone help me with this? all 3 ...
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1answer
21 views

Enable GTID on one node in Percona/Galera

Im having 3 node percona cluster. (5.6) Server ID is enabled on each node but all are different IDs. Binlog and log slave updates are enabled. Now I want to enable GTID on the third node alone. I ...
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14 views

MariaDB Cluster Cannot Join new Node

This is status on Main node. it's show some seqno as 17210843 when new empty node is join. i'm found rsync process is ok. but i see difference seqno in linux process after finish this process my ...
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15 views

One node causing entire Galera Cluster to remain in bad state

I have a production MariaDB Galera 5 node cluster that has been running for about 8 months at our factory. One node had a powerfail / un-graceful shutdown (Ubuntu 16.04) and since then if that node is ...
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8 views

wsrep_provider_options added to galera config file but not shown in mariadb monitor

Today I was trying to setup ssl on my galera cluster, generated all needed keys and certificates and did everything included in related guide here: http://galeracluster.com/documentation-webpages/...
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52 views

Third node cannot join Galera cluster after mariadb update

I tried to deal with this issue for three days now, but unfortunately without success. I have a Galera cluster (Node1 - donor, Node2 - joiner, Node3 - arbitrator) which was working flawlessly until I ...
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0answers
8 views

Can't add new node to Galera Cluster

I have a 5 node Galera 3 Cluster running MySQL 5.6 on Ubuntu 16.04 (I tried running 5.7 but ran into the AppArmor issue). I'm trying to add another node to the cluster but it continually fails. The ...
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1answer
29 views

MariaDB Galera Cluster on Ubuntu 16.04 does not start after rebooting [closed]

I've installed a MariaDB Galera Cluster on Ubuntu 16.04 in 2 nodes. Here the info from node1: root@localhost:~# sudo more /etc/mysql/conf.d/galera.cnf [mysqld] binlog_format=ROW default-storage-...
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24 views

galera_new_cluster doesn't allocate start position, wsrep_connected doesn't turn on, no error logs, what should I do?

I've tried so many different configurations suggested by various website on my MariaDB Galera nodes, yet no success. :( I should see something like: wsrep_start_position=00000000-0000-0000-0000-...
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42 views

MariaDB Galera Cluster node fail to start after stopping

I try to use Galera Cluster for my mariaDB as failover and backup but i got this error when i started to connect the other node to main node. mysql.service - LSB: start and stop MySQL Loaded: ...
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0answers
35 views

galera wsrep_cluster_address value

I am trying to deploy galera multimaster replication but faced some problems, google does not solve it it seems, but I see some people had the same problems in the past. Say, I have 3 servers 192....
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1answer
41 views

A minimum of a 3 Node Galera Cluster is Recommended, but is it better to have 5 nodes?

Right now I have a 400GB database, with a 5 node Galera Cluster. They are all RAID 10 SSDs. I've read the following: If the node goes missing due to a network problem or otherwise leaves without ...
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1answer
49 views

what is MDL? (e.g. 'MDL semantics' or 'MDL locks') Probably Galera related

I found a guy talking about MDL semantics in a Galera/XtraDB bug report. What is MDL? The term MDL also in Galera logs MDL conflict. Please explain in detail. 2018-06-14 17:07:10 140112699321088 [...
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43 views

MariaDB galera cluster with Mroonga in wrapper mode doesn't synch

MariaDB Galera Cluster states that the storage engine needs to be InnoDB. I am using Mroonga on some tables in wrapper mode {which uses InnoDB under the hood as storage engine}. The problem I am ...
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1answer
423 views

InnoDB: Error: log sequence number is in the future!

Hi I have 2 node cluster where recently went offline not sure why. Node1 started fine and all the traffic is on node 1 but node 2 still down due to below error. I tried set the inodb recovery to 3 and ...
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0answers
194 views

Galera Cluster Failed to report last committed

I'm experimenting with Galera Cluster with 3 nodes, but I'm having some issues but I'm not sure why. What I noticed is that I'm having lots of failed to report last committed (number), -110 (...
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1answer
74 views

mariadb, add 4th galera node failed

I have three nodes setup and running perfectly for the past months. Recently I want to add another node in a different location but somehow I keep on getting errors. At first, I was just following ...
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1answer
49 views

Mariadb Galera cluster empty set

I am playing around with a MariaDB Galera Master Master Cluster and I have some issues which I do not understand. [mysqld] bind-address=0.0.0.0 [galera] wsrep_on=ON wsrep_provider=/usr/lib64/galera/...
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1answer
219 views

Node 3 can't connect in galera cluster

I have a cluster of mariadb 10.2.14 galera. We use amazon ec2 machine, with external drive for data and log for mariadb. My galera cluster is working correct with 2 node. But i get this error when ...
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1answer
226 views

Using xtrabackup-v2 as SST method in MariaDB Galera cluster

I have configured mariadb galera cluster as docker swarm service using official docker image: during cluster startup rsync (default SST method) works fine. Wanted to change it to xtrabackup or ...
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2answers
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MySQL XtraDB/Galera Cluster High Availability RamDisk *SuperFast*

Ok, So this is going to be a speculative question, mostly design oriented and a rather long one. I'd grab a cuppa' covfefe, if I were you. Preface: So I have been researching into databases and ...
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2answers
100 views

Percona XtraDb cluster auto increment

Help me please clarify a very important question on which I can't find the answer. It only can be proven with tests. Let's say we have XtraDB Cluster (or Galera Cluster) with three nodes. We have ...
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1answer
31 views

does the gcache.size matter during SST? What if more than gcache.size comes in during SST?

During SST my data dir looks like this (there is a hidden dir .sst with xtrabackup): -rw-rw---- 1 vcap vcap 113 Apr 16 08:13 grastate.dat -rw-rw---- 1 vcap vcap 265 Apr 16 08:13 gvwstate....
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2answers
120 views

MySQL Galera Cluster mass update delay

I have migrated my single MariaDB setup to a 3 node Galera cluster. I am currently in staging and most of normal operations run fine. I have one issue though: if I do a mass update of one column of ...
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1answer
79 views

Galera not working with Replication

I am using MariaDB 10.2 I have node2 (2.2.2.2) running as a slave to some external database. I bootstrapped node2 as the first member of a Galera cluster "my_cluster". Node1 (1.1.1.1) joined with ...
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1answer
218 views

Galera SST fails

I am using MariaDB 10.2 I have node2 (2.2.2.2) running as a slave to some external database. I bootstrapped node2 as the first member of a Galera cluster "my_cluster" When I try to join node1 (1.1.1....
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1answer
376 views

SST not starting on a new node on MariaDB Galera Cluster

I have two MariaDB servers I want to use to create a new MariaDB Galera Cluster: Server mysql1, with some data and configured as a donor Server mysql2, with no data and /var/lib/mysql empty, which I ...
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1answer
85 views

Setup replication between two Galera nodes

I've been using MariaDB 10.2 Galera with 3 nodes successfully on local servers. Now, I have a second 3-nodes Galera cluster on another location, joined by an Site-to-Site IPSec Tunnel. I can't really ...
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Creating galera cluster from mysql-5.6 server

There's production server, running Mysql-5.6.30 under Debian. Database about ~120GB. I want to create Galera cluster. Do I need to re-install MySQL with WSRep pathces, or I can simply add needed ...
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2answers
161 views

why I see only COMMIT or commit in SHOW FULL PROCESSLIST - No SQL statement

I see in lots of output from SHOW FULL PROCESSLIST only COMMIT or commit (lowercase and upercase mix). What are those transactions? Why no SQL statement? We are running MariaDB 10.1.x and Galera ...
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1answer
110 views

Can sst_state_transfer be set to rsync with innodb as storage engine in Galera cluster?

Galera cluster wsrep-sst-method docs states: You can only use rsync when anode is starting. You cannot use it with a running InnoDB storage engine. I do have InnoDB storage engine configured in ...
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1answer
40 views

I can't add extra node after reset root password mariadb 10.1.20

I have a mariadb 10.1.20 cluster with 5 nodes. I don't know root password so I did the following steps: On second node, I stopped mysql service I set wsrep = OFF on /etc/my.cnf.d/server.cnf I ...
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30 views

Connect to a MariaDB database cluster from a clinet on a different subnet

I have three servers where each one of them has two Ethernet interfaces namely eth0 and eth1. I have set up MariaDB server galera cluster with three servers with IPv4 addresses 192.168.1.100, 192.168....
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1answer
251 views

MySQL Galera cluster can't initiate first node

I'm using Ubuntu 16.04 and installed MySQL version 5.7 via apt-get in AWS. After that, I've managed to upgrade the MySQL to Galera Cluster by following the Documentation from the official website ...
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1answer
153 views

Galera Failures

I have 2 nodes. One a VPS on NFO Servers and another on Azure. I have setup the firewalls/disabled the firewalls. The nodes are CentOS 7, Latest Kernel. The configs are as follows: Node 1 (Master DB) ...
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1answer
4k views

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2 “No such file or directory”) when configuring cluster

I have 3 MariaDB nodes. Want to configure cluster. Specified in gcomm:// in my.cnf ips of all members in cluster according to this. And added ?pc.wait_prim=no at then of gcomm://ip1,ip2,ip3 Then ...
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0answers
150 views

re-sync between master and slave (galera)

Mysql Server-1,Server-2,Server-3 is running as Galera and server-2 is slave. Mysql Server-4 is master. my.cnf file master side is : [MYSQLD] binlog-format=ROW log-bin=binlog server-id=1 and also ...
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0answers
44 views

Debugging Galera TX conflicts when no SQL is logged

I'm trying to debug an intermittent transaction conflicts in my cluster. With the debug output enabled, I'm getting following logged: *** Priority TRANSACTION: TRANSACTION 1691804310, ACTIVE 0 sec ...
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1answer
72 views

can't increase gcache.size galera cluster mariadb

i wanted to increase the value of gcache.size on my 3 nodes of the mariadb galera cluster (galera v25.3.22(r3764), mariadb Ver 15.1 Distrib 10.0.33 - MariaDB, for Linux (x86_64) using readline 5.1), ...
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1answer
134 views

mariadb galera bootstrapping fails

Starting point at the sandbox sb1, sb2, sb3: All boxes identical. A Fresh debian 9 install mariadb 10.2 Galera3 build a test galera cluster with empty databases works fine. All three nodes come up ...
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78 views

Maxscale binlog router doesnt read from backend

I am just configuring a maxscale 2.1.13 server as proxy and i found a problem with the binlog router. It doesnt recognice the backend servers hence it cannot connect to them and retry the users and ...
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1answer
645 views

mysqld got signal 11

I have MariaDB in Galera cluster of 3 nodes. Periodically, each node in the cluster restarts by sending yourself a signal 11. I scoured the Internet in search of a solution to the problem, but to no ...
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0answers
54 views

Move a node from cluster to be a slave of the cluster in Galera

I have 5 Node in Galera cluster. MariaDB Server 10.1.21-MariaDB-1~trusty. I will remove 2 nodes from it but one of them will be a slave. So from 5 nodes 5th one will be completely removed, 4th one ...
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1answer
215 views

MariaDB Galera stop working without network connectivity

I am running MariaDB Galera cluster whose using mariaDB and 3 nodes(node A, node B, node C). My nodes are placed locally in our office. My problem is if node A/B/C lost network connection, it also ...
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57 views

Galera Cluster turning on without any node

I am running active-active MariaDB Galera cluster whose using mariaDB and 3 nodes. Everything running perfectly, but for testing purpose I've shutdown node 3 and node 2, then when i tried to turn on ...
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1answer
311 views

How to perform backup on quite active 500G+ MariaDB Galera Cluster?

what would be your preferred method to perform backup on quite active 500G+ MariaDB Galera Cluster? Using mariabackup/innobackupex (fork of Percona Xtrabackup) with throttle. You must think about ...
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1answer
166 views

Internal MariaDB error code: 1927 ('Connection was killed')

Edit: filed a bug report at https://jira.mariadb.org/browse/MDEV-14493 Mariadb nodes freeze occasionally with the following error in the logs, any clues? (drupal app, db freezes on clearing ...