Plesk Control Panel Issue

“All of a sudden this server‘s control panel license got expired, its a permanent license and we are not sure how it get expired. Please fix this issue ASAP”

Possible Solution

“The problem occurred because of the 5224 port is filtered on the server:

It is required for communication with our licensing server

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If an error code is returned when issuing a backup request, the most likely cause is insufficient memory or disk space. You should check that there is enough memory allocated for the backup.

If you have set BackupDataBufferSize and BackupLogBufferSize and their sum is greater than 4MB, then you must also set BackupMemory as well. See BackupMemory. You should also make sure that there is sufficient space on the hard drive partition of the backup target

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If you have problems with file permissions, the UMASK environment variable might be set incorrectly when mysqld starts. For example, MySQL might issue the following error message when you create a table:

ERROR: Can't find file: 'path/with/filename.frm' (Errcode: 13)

The default UMASK value is 0660. You can change this behavior by starting mysqld_safe as follows:

shell> UMASK=384  # = 600 in octal

shell> export UMASK

shell> mysqld_safe &

By default, MySQL creates database and RAID directories with an access permission value of 0700. You can modify this behavior by setting the UMASK_DIR variable. If you set its value, new directories are created with the combined UMASK and UMASK_DIR values. For example, if you want to give group access to all new directories, you can do this:

shell> UMASK_DIR=504  # = 770 in octal

shell> export UMASK_DIR

shell> mysqld_safe &

MySQL assumes that the value for UMASK or UMASK_DIR is in octal if it starts with a zero

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Problems Linking to the MySQL Client Library

When you are linking an application program to use the MySQL client library, you might get undefined reference errors for symbols that start with mysql_, such as those shown here:

/tmp/ccFKsdPa.o: In function `main':

/tmp/ccFKsdPa.o(.text+0xb): undefined reference to `mysql_init'

/tmp/ccFKsdPa.o(.text+0x31): undefined reference to `mysql_real_connect'

/tmp/ccFKsdPa.o(.text+0x57): undefined reference to `mysql_real_connect'

/tmp/ccFKsdPa.o(.text+0x69): undefined reference to `mysql_error'

/tmp/ccFKsdPa.o(.text+0x9a): undefined reference to `mysql_close'

You should be able to solve this problem by adding -Ldir_path -lmysqlclient at the end of your link command, where dir_path represents the path name of the directory where the client library is located. To determine the correct directory, try this command:

shell> mysql_config --libs

The output from mysql_config might indicate other libraries that should be specified on the link command as well.

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