How to Resolve ORA-01861: literal does not match format string

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ORA-01861 ORA-01861 means that different format between two operands can not be compared. In this post, you will see some error patterns and their respective solutions. The following statement looks like no problem. SQL> conn hr/hr Connected. SQL> set heading off; SQL> select count(*) || ‘ Persons’ from employees where hire_date > ‘2008-03-01’; select count(*) […]

How to Resolve WebLogic Startup Slow

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WebLogic Startup Slow After long WebLogic installation, I found that every time I startup WebLogic Server, it took about 10 to 15 minutes to complete. Which is unbearable and unacceptable for a production environment. Rationale This is because JVM library used for random number generation relies on /dev/random by default for UNIX platforms. This can […]