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Master/slave Replication Error


I have set up master/slave replication between 2 servers (1 master,
1 slave). However, when I change a table on the master (e.g.
by inserting a row), the same table on the slave is not updated.
The strange thing is that if I enter SHOW SLAVE STATUS on the client,
it gives me the same offset in the binary log on the master as the
master gives when issuing SHOW MASTER STATUS (both entered after the update).

Code:




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Related Forum Messages:
Replication :: Slave Thread: Error Connecting To Master: Access Denied For User
I have MySQL 3.23.41 on a RH-7.2 Linux used as local server. I'm trying to replicate the databases from server (192.168.0.1) to another linux PC (192.168.0.3).

Following the manual, i grant to the master a user with file privileges, and edit both my.cnf files. The master starts fine but the slave mysql.log shows up an error:

Slave thread: error connecting to master: Access denied for user:
replica@localhost' (Using password: YES) (0), retry in 60 sec

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Replication, Slave Thread: Error Connecting To Master: Access Denied For User:
I have MySQL 3.23.41 on a RH-7.2 Linux used as local server. I'm trying to replicate the databases from server (192.168.0.1) to another linux PC (192.168.0.3).

Following the manual, i grant to the master a user with file privileges, and
edit both my.cnf files. The master starts fine but the slave mysql.log shows up an error:

Slave thread: error connecting to master: Access denied for user:
replica@localhost' (Using password: YES) (0), retry in 60 sec

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Master Slave Replication Working But Slave Log Name Stuck?
I have been checking SHOW SLAVE STATUS; and keeping an eye on it. It lags but seems to be still going. However. Today I notice that the Master_Log_File changed from

domain-bin.000001 to domain-bin.000002
and the
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slavedomain-relay-bin.000001 and a really large growing number for: Relay_Log_Pos

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Replication :: Innodb (master) --replication --> Myisam (slave)
I want to ask whether I can do replication in the following case.

innodb (master) --replication --> myisam (slave).

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Replication From Master To Slave
I'm having quite a fuss with my two MySQL DB servers lately. I'm trying to establish replication between a MySQL 4.0.20 server (master) and a MySQL 4.1.11 server (slave).

From what I read, replication from a 4.0.x server -> 4.1.x server will work, just not the other way around.

However, that's not really my problem. After unsuccessfully completing the configuration myself, I used ....

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Master Slave Replication
I am setting up a Master/Slave system so that the data will always be backup up safely when any changes are done.

Now - I am not sure to what extent the replication extends to. I know it is fine for Data but what about these scenario's

1. Master table structure changes - are these replicated
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Replication Master & Slave On The Same Machine
I have set up a master and a slave according to the manual. The master runs 4.0.12 and the slave runs 4.0.14, they are both actually on the same machine (it's a long story, but it's what I need). I did LOAD DATA FROM MASTER on the slave which completed successfully, and then I tried SLAVE START:

ERROR 1200: The server is not configured as slave, fix in config file or with CHANGE MASTER TO

but.. it is! on the slave: Code:

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Replication Of Few Tables From Master To Slave
I'm replicating just a few tables from the master to the slave.

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Master/slave Setup To Do Replication
using mysql 4.1.7, have a master/slave setup to do replication.

Is there anyway to prevent the slavedb from accepting inserts other than the replication inserts?

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Replication :: Switching Master And Slave On Failure
I have 2 servers, A and B. A is the primary server and master in mysql.

B is the redundant server and the slave in mysql. A is replicating to B. Now A fails and B becomes the primary server (still slave in mysql?). A finally comes back up, but instead of switch primary status from B back to A, A becomes the redundant server and B stays as primary. Now, I need B to be master in mysql and A to be slave in mysql.

I don't know if this can be done the way it needs to. If it can I really don't need a step by step process unless someone is really willing to give that to me. I just would like to know if this can be or has been done.

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Replication :: Understanding Master & Slave Servers
Can anyone share their experience with replication? In particular I'm wondering how fast (or how slow?) replication occurs. Could I pull off the configuration below?

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Replication 2 Sever Master & 1 Server Slave
i want to make replication database with 2 server master dan 1 server slave, any body help me how setting or configuration in mysql.

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Replication Slave Error
030710 22:36:43 Slave: connected to master 'repl@217.58.xxx.yyy:3306',
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I've tried to do also
Reset master
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Replication :: Error Connecting To Master
Show master status on the master looks fine. When I start mysql on the slave, here's what I get:

071017 10:20:35 [Note] Slave SQL thread initialized, starting replication in log 'binary-log.000006' at position 3031, relay log './web1-relay-bin.000003' position: 98
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Master my.cnf:
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

old_passwords=1

log-bin=/var/db/repl/binary-log

binlog-do-db=mydatabase
binlog-ignore-db=abunchofotherdatabases

server-id=1

[mysql.server]
user=mysql
#basedir=/var/lib

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

Slave My.cnf:
[mysqld]...........................

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Master Master Replication, Truncate Table Fails, Version 5.0.22
I have set up a master master replication link between two databases, prototyping an idea. Anyhow, adding records and deleting works, both get updated, creating and dropping tables works, but truncating tables doesn't work.

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Backing Up A Circular Master-master Replication Setup
I have a running circular master - master replication running.

I want to run a mysqldump on one of the servers but am worried what the impact of running a mysqldump will be on the replication.

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I see the option --delete-master-logs for mysqldump and am assuming that it deletes the previously inserted log items from the binary log file.

If there is someone that can please just give me a little more clarification on how the --delete-master-logs option works.

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Master / Master Asynchronous Replication
Currently we have a web based application that is mostly reads (4:1
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Master/Master Replication Problems
I was wondering whether someone could help me.

I have inherited set of replicated servers from a guy I used to work with, basic set up is:

Master1/Slave2 - Server ID 1
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Now my understanding of this type of set up is that Server ID 1 writes directly to Server ID 2, then Server ID 1 is in turn replicated to.

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Is there an ability to get MySQL to log all queries it is running, so I can get to the bottom of all queries currently being executed?

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MySQL Master/Slave
In the case of 2 3.23.X series mysql databases in a master/slave
replication setup (myiasm tables), if a FLUSH TABLES WITH READ LOCK is
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waiting for the binlog update(s) to be confirmed from the slave, or
does the master merrily carry on not caring in the least that the
slave tables are locked?

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Master/Slave Restoration
I have 2 servers (A and B) setup as Master and Slave respectively. Upon A's failure, all client's request will be directed to B.

How can I set A to become master again after its been restored from its failure? In chapter 4.10 of mysql docs, it mentioned (vaguely) that A will become B's slave to sync all operations that had happened after the failure. Finally, upon full sync switch A to become Master again and B to slave.

How can I setup A to be a slave of B? The problem I faced is that I can't find out what the bin log and position is from B since "show master status" is always empty. I guess B still thinks its a slave.

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Different Errors On Master And Slave.
Replication stopped on slave servers when I executed the below query, and this query failed on master.

mysql> UPDATE members set col1 = 1000, col2 = 10 where type = 2;
ERROR 1030 (HY000): Got error 127 from storage engine
Here is the error message on when I do SHOW SLAVE STATUSG

Last_Errno: 0
Last_Error: Query caused different errors on master and slave. Error on master:
'Got error %d from storage engine' (1030), Error on slave: 'no error' (0). Default
database: 'subscribers'. Query: 'UPDATE members set col1 = 1000, col2 = 10 where type = 2'
members table contains 1485112 rows.

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Procedures To Promote Slave To Master Server
What is the proper procedure for promoting a Slave into a Master
replication server?

We want to do some fail-over testing. When we tried this in the past, the
former master would not replicate. We got an error: "master and slave
have equal MySQL server ids".

The fail-over procedure includes renaming the slave and exchanging IP
addresses with the master server. We did not change the server-ids.

I haven't found any information on promoting slaves to master servers.

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LOAD DATA INFILE :: Master & Slave
After recently replicating using the stop databases and copy innodb and mysql files method, things were fine...Until the slave thread stopped complaining about duplicate rows after one of our developers did a LOAD DATA INFILE operation on the master.

Unfortunately the insert's are into a table using AUTO_INCREMENT as well and this may be compounding the problem.I have read the docs, but it's sort of unclear, does LOAD DATA INFILE work in a replicated 3.23.56-1 setup, only under certain circumstances, or not at all?

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Forwarding Insert/Updates From Slave To Master
Is there a way within MySQL to forward all Inserts/Update requests from the
Slave to the Master, or much I rearchitect my application to carry two
connection; one connection to the Master for updates and the other
connection to the slave for Selects?

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LOAD DATA :: Master & Slave Server
I was doing replication using MYISAM table types. When I set up my database server on the Slave, I used to LOAD DATA FROM MASTER to get the first snapshot of my running master. This worked great.

Now we moved to using InnoDB table types to get rollback/commit features and also to enforce Foreign key checks. I read that current version of InnoDB does not support LOAD DATA FROM MASTER command.

I would like to be able to setup my slave without taking down the server. Is there a way to do so without buying the InnoDBHotBackup.

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MyISAM On Master And InnoDB On Slave Server
Is this possible to have a MyISAM table on master server and change its storage engine (to InnoDB) on slave server in a replication environment?

If this is possible, what should I consider before changing MyISAM to InnoDB on slave server?

Here is the table structure:

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Restart Slave After Master Has Died In Replicated Environment
Our master database ran out of connections and we had to restart the
server (couldn't SSH into the box). Rebooting the server worked and
of our clients resumed activity.

The problem is that the slave didn't start automatically so I tried to
do a START SLAVE; on it.

This is the latest shown in the error log on the slave.


040110 20:06:13 Error reading packet from server: binlog truncated in
the middle of event (server_errno=1236)
040110 20:06:13 Got fatal error 1236: 'binlog truncated in the middle
of event' from master when reading data from binary log
040110 20:06:13 Slave I/O thread exiting, read up to log
'user1_master.002', position 802078191

(THIS IS AFTER I DID A SLAVE_START TODAY 1/20)

040120 8:56:39 Slave I/O thread: connected to master
'slave@db1.ezboard.com:5000', replication started in log
'db1_master.002' at position 802078191
040120 8:56:39 Slave: there is an unfinished transaction in the
relay log (could find neither COMMIT nor ROLLBACK in the relay log);
it could be that the master died while writing the transaction to its
binary log. Now the slave is rolling back the transaction. Error_code:
0
040120 8:56:39 Error running query, slave SQL thread aborted. Fix
the problem, and restart the slave SQL thread with "SLAVE START". We
stopped at log 'db1_master.002' position 802078147.

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Mysql Master/Slave Read Write To Database Question
If I setup my database as master/slave and user enters data into the html form. This data is written to the master database. After html form submission user is directed to view.html to view the submitted data. The view.html page does the read from the slave. Would it be safe to assume that the data that user submitted would be written to master and immediately displayed in the view.html by reading slave data base?

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Can't Set-up Slave In Replication
I'm trying to set-up replication following a book and on-line guide. This
is over SSH with a tunnel (not sure if the tunnel's required).

The master appears to be set-up OK (easy enough).
The slave however isn't behaving.

I've got a my.cnf with the following:

[mysqld]
master-host=127.0.0.1
master-port=APORT
master-user=AUSER
master-password=APASSWORD
server-id=2

When I start the slave up and do show slave status - I get 0's and
blank entries back.

I've tried setting it up using:

CHANGE MASTER TO
MASTER_HOST='localhost',
MASTER_USER='AUSER',
MASTER_PORT=APORT,
MASTER_PASSWORD='APASSWORD',
MASTER_LOG_FILE='AFILE-bin.001',
MASTER_CONNECT_RETRY=10;

This sets up the slave bits and show slave status looks much better,
however,

SLAVE START;

returns...

The server is not configured as slave, fix in config file or with CHANGE
MASTER TO

I can only seem to find this message in pages that have a list of all Mysql
errors.

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NOW() At Replication Slave
We have 3 MySQL servers in replication, 1 master and 2 slaves. One slave server is 300 seconds behind the master due to heavy SELECT statements.

If I run INSERT query (containing NOW()) on master at 10:00 AM, what time will be saved in the slave server which is 300 seconds behind? The query is

MySQL Code:

INSERT INTO users (username, password, signup_date_time) VALUES ('user1', 'pass1', NOW())

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Replication: 2 Masters And 1 Slave
I need to replicate 2 databases (each one resides in a different
server) to a single slave server. Reading the documentation I have
running the master/slave replication, but i need to replicate the
other database too, the problem is: I need replicate the other
database and that database exists in the other server, so how I
configure the other master server/datatabase in the slave?

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Replication - START SLAVE
When I try to start the slave for replication

I get a sytax error:

START SLAVE;

not much should be able to go wrong when you're typing in two words.

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Replication Is Stopped On Slave
using replication on mysql-4.1(Master) to mysql-4.1(Slave). Suppose Master DB inserting queries in binary log file at master-bin.01 at position 100.

And on slave somehow replication is stopped.
mysql-slave> show slave statusG

Master_Host: master-ip-address
Master_Log_File: master-bin.01
Relay_Log_File: slave-relay.01
Slave_IO_Running: No
Slave_SQL_Running: No
Read_Master_Log_Pos: 100
Exec_Master__Log_Pos: 50

After fixing slave problem when i run following command

mysql> START SLAVE;

starts Slave IO_THREAD and Slave SQL_THREAD. Because slave io_thread started that's why new relay log file created slave-relay.02 and slave io_thread resumes to log queries after position 100 (Read_Master_Log_Pos: 100) to new relay file slave-relay.02 file like position 101,102 .... onwards.

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Replication Database On Slave Is Not Updated
We are using mysql v4.0.24 on Linux machines.

I'm trying to set up replication with a master and only one slave
database.

The syncronization seems to work well, the relay file on slave is wrote
correctly (Read_Master_Log_Pos and Relay_Log_Pos are updated) but the
information on slave database is not updated.

Master and slave are sincronyzed as shown below but for some reason I
don't understand. I have to say thay sometimes the replication worked but sometimes
setting up a new slave or changing a slave to master it does not. Code:

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Single Slave Replication From Three Masters
Is it possible, and what are the ramifications, of having a single slave replicate from three masters? I have six machines, three real servers with three replicating. Be nice to free up two machines and have just a single 'slave'.

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Replication :: New Database Won't Copy To Slave?
I am confused about MySQL replication. I had someone set it up for me on my server and it works for what is already there. If I add a new database to the master db it doesn't seem to carry over to the slave. Is Replication for the entire MySQL server or is it database specific?I keep reading the manual and it looks server specific but I'm not getting new dbs over on the slave. Do I need to restart the slave?

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Replication From 2 Master
I am running MySQL V4.0.14 with replication. I want to replicate specified databases from 2 different masters into one slave. Is this possible?

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Mast-Master Replication
I am unable to find any information about master-master replication. I need to replicate 1 mysql server over to other as a standby master server.

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Dual-master Replication
I would like to set up a dual-master replication setup for my MySQL
database
(running on RedHat 9). Could someone please point me to appropriate
website that details this setup process and management as well (i.e.
what should I do if one of the masters goes down?).

Also, are there any solutions that allow auto-increment fields in this
kind of setup?

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Replication :: Run RESET MASTER
If I run RESET MASTER on the primary MySQL server (the master) will it wait till the slaves are up to date before deleting the bin files or do you think my slaves will get screwed up?

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Replication Master Crashed After 6 Hours
I recently setup replication, the master and slaves appears to work
fine initially. After about 6 hours, the master mysqld process will
start to consume 99% CPU and the load (avg. load per minute) will go
to 3, 4, 6, 15, 24, 56, 312... in a matter of seconds! The master then
stops responding and needs a reboot. This problem is reproducible, I
have tested a few times.

This is a screenshot of "top" command just before the master died:
http://choonkeng.hopto.org/temp/replication-hang.gif

There are plenty of memory and no disk swapping when the master goes
99%. Error and slow logs don't show any useful information.

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Master Replication Automatic Failover
I am having one master and three slaves. If my master fails suddenly then one of my slave has to become master automatically on any platform (windows/linux). Can you please suggest the process to do this.

Note: Manually i know how to do this task, but i need to be do this automatic.

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Multi-Master Cross OS Replication
I normally run two Linux MySQL servers in multi-master replication and it has worked fine. Now I have had one of the machines die on me. The problem is that I want to now have that same replication configuration between my Linux and Windows machine which both run MySQL.

The configuration on the linux machine I don't really have trouble with at all, but editing the my.ini file on windows to setup the master host causes the service to fail to start. So my question is what is the appropriate configuration of my.ini on windows to facilitate multi-master replication?

Many hours of googling produced limited results/tutorials, none of which were helpful (most of which were for Linux which again I am familiar with already).

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Muti Master Server Replication
I need some help in setting up multi master server replication
setup fpr my project. Till now I have set up single master replication, but had not been able to manage anythin on mulitimaster setup.

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Dual Master Replication In MySQL 4.1
I have been charged with the task of setting up dual master replication with our company's MySQL servers. I know that their are inherent auto_increment problems with this set up, and the mechanisms to fix this problem weren't introduced until version 5.0.

Can anyone give me some tips, pointers, or advice for safely setting up this replication topology in 4.1? Are there any steps I can take to make sure there are no auto_increment issues? Has anyone had experience setting this up?

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Replication With Master And Several Slaves/Masters
At the company I'm working (a road survey centre) where about to start a new project.

We're planning to create web-based application with php, javascript, maybe we're going to use AJAX but certainly combined with a MySQL database to store all of the data.

Since users/researchers have to be able to work off-line on a laptop. Our idea was to install, via XAMPP or something like that, the complete package (i.e. Apache, PHP, MySQL) on each laptop. On a main server we have the same but probably a Linux system.

Now, I know it is possible to replicate the DB on the laptops with the main DB. But is it also possible to update/replicate the main DB with results from the/a laptop after working a day off-line? So it becomes available on each laptop after they done a replication from the main DB?

Maybe a long post for a small question, but I wanted to draw the "context" in wich it is going to be used. A question you are about going to ask me probably is: "why they have to be able to work off-line?" Quite simple: Not everywhere in the world you have wireless internet access + the onsite laptops need to communicate on site with serial devices GPS, Gyroscope, and such like. Wich is for a webbased application running on a server thousand miles rather difficult...




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Replication :: Master Log File Position Changed
I have a simple master/slave replication environment that is working smoothly with one exception. If I restart the master server the Master Log File is incremented by one (e.g. the original master log is named data-bin.000001 and the new master log is named data-bin.000002) the slave server never notices that the Master Log File and the Master Log Position have changed. Instead, the slave sits there waiting for new entries in the old Master Log File. I can tell this by executing a SHOW SLAVE STATUS on the slave server.

I am not sure about this because I can't find any documentation on the proper behavior of mysql during this scenario, however, I am under the impression that slave server should be able to figure this out and continue replicating, without requiring me to execute an "CHANGE MASTER..." command on the slave server every time the master is restarted. Of course, I assume this same problem will occur when the Master Log File grows to its maximum size and a new Master Log File is
created.

If anybody who has experience with mysql replication could just confirm that the behavior I am seeing is not correct, that would be great. Or if anybody has any suggestions as to what, if anything, is wrong with my setup. Code:

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Replication :: Show Master Status Return Empty Set
I am trying to set up replication on 2 servers. I am following the procedure on mysql.com.
After you have done the grant replication and the snapshot, you have to do SHOW MASTER STATUS; and it is suppose to return informations. But for me, it returns "empty set".

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