C.5. Problems And Common Errors; C.5.1. How To Determine What Is Causing A Problem - Oracle 5.0 Reference Manual

Message: Connection using old (pre-4.1.1) authentication protocol refused (client option
'secure_auth' enabled)
• Error: 2050 (CR_FETCH_CANCELED
Message: Row retrieval was canceled by mysql_stmt_close() call
• Error: 2051 (CR_NO_DATA
Message: Attempt to read column without prior row fetch
• Error: 2052 (CR_NO_STMT_METADATA
Message: Prepared statement contains no metadata
• Error: 2053 (CR_NO_RESULT_SET
Message: Attempt to read a row while there is no result set associated with the statement
• Error: 2054 (CR_NOT_IMPLEMENTED
Message: This feature is not implemented yet
• Error: 2055 (CR_SERVER_LOST_EXTENDED
Message: Lost connection to MySQL server at '%s', system error: %d

C.5. Problems and Common Errors

This section lists some common problems and error messages that you may encounter. It describes
how to determine the causes of the problems and what to do to solve them.

C.5.1. How to Determine What Is Causing a Problem

When you run into a problem, the first thing you should do is to find out which program or piece of
equipment is causing it:
• If you have one of the following symptoms, then it is probably a hardware problems (such as
memory, motherboard, CPU, or hard disk) or kernel problem:
• The keyboard does not work. This can normally be checked by pressing the Caps Lock key. If
the Caps Lock light does not change, you have to replace your keyboard. (Before doing this, you
should try to restart your computer and check all cables to the keyboard.)
• The mouse pointer does not move.
• The machine does not answer to a remote machine's pings.
• Other programs that are not related to MySQL do not behave correctly.
• Your system restarted unexpectedly. (A faulty user-level program should never be able to take
down your system.)
In this case, you should start by checking all your cables and run some diagnostic tool to check your
hardware! You should also check whether there are any patches, updates, or service packs for your
operating system that could likely solve your problem. Check also that all your libraries (such as
glibc) are up to date.
It is always good to use a machine with ECC memory to discover memory problems early.
• If your keyboard is locked up, you may be able to recover by logging in to your machine from another
machine and executing
Problems and Common Errors
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