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Old 20th September 2011, 07:07
holykim holykim is offline
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Default Slave with Mysql5.5 cannot connect to the Master


Recently I installed MySQL 5.5 to one of the slaves and found that it cannot connect to the master server anymore. I created a new db on the slave from the master server but nothing created.

I tried to reconfigure permission in the master database but got an error as below.
Unable to connect to mysql server Lost connection to MySQL server at 'reading initial communication packet', system error: 110

All other slaves which installed MySQL 5.0 are working fine. I installed MySQL 5.5 to the test server and had a same result.

I cannot figure out how to resolve this issue and need your advise. ISPConfig version is

Thanks in advance.

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Old 20th September 2011, 10:25
till till is offline
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Are you able to connect to the master server as root user from the shell of the slave with the mysql command. Example:

mysql -h master.yourdomain.tld -u root -p dbispconfig

the command should ask you then for the root password of the master server.
Till Brehm
Get ISPConfig support and the ISPConfig 3 manual from ispconfig.org.
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Old 20th September 2011, 11:30
holykim holykim is offline
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Thanks Till

I was unable to have the connection to the master server. It wasn't mysql problem.

I added the master IP in the hosts file and it works.

Thanks again.

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