How to fix jos_session marked as crashed or a similar error:
DB function failed with error number 145
Table './user_joomla/jos_session' is marked as crashed and should be repaired SQL=INSERT INTO `jos_session` ( `session_id`,`time`,`username`,`gid`,`guest`,`client_id` ) VALUES ( '3a4097ac2be361fb0f311f72ba3901f8','1332849057','','0','1','0' )
This is one of the most common error in Joomla and it only means that the table jos_session has crashed or is damage. This table stores your session and you can easily fix this via cPanel or phpmyadmin. See the instructions below.
Disclaimer: Use the information at your own risk. It is also ideal that you backup everything first as unexpected things might result in data loss.
Login to cPanel >> Database >>
MySQL Database >> then on Modify Databases select which database is broken and then click on Repair DB button.
Login to cPanel >> phpMyAdmin then on the phpMyAdmin select the joomla database and look for the table jos_session. Once you selected that table by ticking on the checkbox choose Repair Table from the drop down and you will find at the bottom of the list of tables.
That you should get your joomla going again.