Eager to Code, Enjoy to Debug ~ Embark into Each Stage with Your Heart

Archive for July 3rd, 2009

If you had found the following error appears in the log, it indicates the missing of JNDI errors:

******* ERROR: No database connection found for helperName “defaultDS”
……
Failed to find DataSource named java:comp/env/jdbc/JiraDS in JNDI server with name default.
Trying normal database.
javax.naming.NameNotFoundException: Name jdbc is not bound in this Context
……
(more)

The error seems the configuration problem in the server.xml [...]

Recently there is a reported issue regarding with the MySQL database that throws the SQL exception of converting values to timestamp:

(SQL Exception while getting value: (Cannot convert value ‘0000-00-00 00:00:00′ from column 15 to TIMESTAMP.))

At the beginning, I’m not sure what is the problem with the conversion and I really have no idea why [...]


Friday’s Java Snack


In Java, "thread" means:

  • An instance of class java.lang.Thread
  • A thread of execution


An instance of Thread is just an object that has variables and methods, and lives and dies on the heap.
 
A thread of execution is an individual process that has its own call stack (one thread per call stack).

 

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