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Questions tagged [galera]

Galera Cluster is a synchronous multi-master cluster for MySQL.

From the project home page, Galera Cluster's features include:

  • Synchronous replication
  • Active-active multi-master topology
  • Read and write to any cluster node
  • Automatic membership control, failed nodes drop from the cluster
  • Automatic node joining
  • True parallel replication, on row level
  • Direct client connections, native MySQL look & feel


346 questions
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Galera 10 cluster node dropping queries

We are encountering an error on Node 1 of a 5-node cluster. Queries to Node 1 seem to succeed from a client perspective but are failing to insert. We are seeing a lot of autoinc errors even though autoinc shouldn't be involved in the update…
Derek Warner
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mariadb galera - Error when a node shutdown ERROR 1047 WSREP has not yet prepared node for application use

I installed 2 Mariadb Galera nodes (mariadb-galera-10.0.27-linux-x86_64.tar.gz) on 2 CentOs 6.6 servers. After installed, I start node1 with parameter --wsrep-new-cluster, then start node2 without this parameter. They work fine, data is…
namdt55555
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Detecting changes in Galera cluster DB (mysql). Implementing application cache invalidation

I want to add a cache to a distributed application that uses a Galera cluster (mysql) as DB. Each application node (java) has a local cache for reads and comunicates with a DB node. The problem is I don't know how to invalidate entries in cache…
fonkap
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What is the right MariaDB Galera jdbc URL properties for loadbalance

I have setup have 2 nodes of MariaDB 10.0 Galera cluster running on both private IPs of 192.168.2.51 and 192.168.2.52. I'm about to try connecting to the cluster using MariaDB's JDBC Client (org.mariadb.jdbc.Driver) provided by MariaDB's website. It…
Max
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Unable to create MariaDB Galera Cluster

I have built an image based on mariadb:10.1 which basically adds a new cluster.conf but facing the following error on the second node after the first node started working successfully. Can somebody help me debug here? Error log tail 2016-09-28…
activatedgeek
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MariaDB gcomm backend connection failed 110

I'm trying to get work MariaDB Galera 10.1 under debian 8 jessie. I've installed all neccesary components and did configurations but i cannot get it work. The nodes are builded as VPS. Configuration of node 1: [mysqld] # Cluster node…
Kamil
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Maxscale lost connection

I'm currently testing Maxscale with a Galera Cluster of 3 nodes in Read/Write Split mode. By default, Maxscale defines one node as a master and the other as slaves (my configuration says 100% of the slaves). My intend is to check how Maxscale…
user494599
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1 answer

mariadb cant start WSREP: std::bad_alloc

Good day everyone. The cluster was based on mariadb10.3. updated to 10.4, worked for a week + - After a network failure, it stopped starting. in the log only this 2020-11-14 15:03:16 0 [Note] WSREP: Server initial position:…
Константин Аксарин
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ERROR 1047 (08S01): WSREP has not yet prepared node for application use when I create database or use database

Before ask the question, I searched the stackoverflow, found a similar post: mariadb galera - Error when a node shutdown ERROR 1047 WSREP has not yet prepared node for application use But however the post is two-node cluster, mine is three-node, and…
aircraft
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MySQL Galera node not starting (aborting with Error 'WSREP: [...]: 60: failed to reach primary view: 60 (Operation timed out)')

I am trying to setup three Galera nodes on FreeBSD 10 with MySQL 5.6.26 and VirtualBox. When I set up everything and run MySQL, it exits after some time and cannot start properly. Here is my log: 2015-10-22 15:23:24 9402 [Note] WSREP: Read nil XID…
user2642601
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problems with node joining the cluster when using sst:xtrabackup (galera)

It looks like the node is joining the cluster and then it fails… I have tried with both rsync and xtrabackup and it fails during state transfer. I seems to me that I am missing something real simple and I am not able to put a finger on it.. Any help…
nimesh
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How synchronous is galera cluster

Actually I have couple of questions here. 1) When I call insert from my application using Mysql connector, its answered by one of the Master node, but does that master node waits before the insert is applied on all the nodes and then reply to the…
user3404572
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Scheduler in clustered environment

Our (Spring) application contains several Schedulers which become active during the night to change/update some data (from Database) in Batch. This is all running fine, the problem is that our application will soon run in a clustered…
user2054927
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Mysql connection time out in grails application, using mariadb galera cluster over ELB

I just recently migrated my database to support replication with a 2 node cluster database from mysql to mariadb. The database are hosted over different domain and is accessed over a ELB, when I point my application to one of the node the…
thickGlass
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How can I remove a node from my galera cluster?

Is there any better way of doing it,apart from setting 'wsrep_cluster_address='gcomm://' for each node that I want to remove?
user5312201
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