'java.sql.SQLException Got error 28 from storage engine' Error when Viewing a Page

Symptoms:

Viewing a page fails with this stack trace found in the atlassian-confluence.log:

...
org.springframework.jdbc.UncategorizedSQLException: Hibernate operation: Could not execute query; uncategorized SQLException for SQL []; SQL state [HY000]; error code [1030]; Got error 28 from storage engine; nested exception is java.sql.SQLException: Got error 28 from storage engine
Caused by: java.sql.SQLException: Got error 28 from storage engine
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1072)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3563)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3495)
...

Cause:

MySQL database server has no space left to work in its tmp directory.
Resolution:

Verify whether there is sufficient disk space on the MySQL database server.

Reference