MySQL Bugs: #2400: Connection failure with wait

Bug #2400	Connection failure with wait_timeout > 2147483
Submitted:	15 Jan 2004 10:10	Modified:	3 Feb 2004 12:44
Reporter:	Lars-Göran Forsberg
Status:	Closed
Category:	Server	Severity:	S2 (Serious)
Version:	4.0.17	OS:	Microsoft Windows (Windows 2000)
Assigned to:	Bugs System	Target Version:

Description:
When the MySQL server is configured with wait_timeout larger than 2147483, client
connections are lost if they are idle for more than ~0.5 seconds. Same behaviour with
both JDBC client and mysql client.
If queries are executed repeatedly without any delay between them, the connection seems
to stay alive.

Setting wait_timeout to higher values worked with 4.0.13 and earlier versions, and seems
to work for HP-UX binaries.

How to repeat:
Install MySQL 4.0.17 on Windows.
Start the mysqld process (either as service or standalone).
Connect to server using the mysql.exe client.
Execute "set wait_timeout=2147484;".
Wait a second.
Execute some other query, for example "show databases;".
The result for this query should be: "ERROR 2013: Lost connection to MySQL server during
query"
Execute "show variables;" and it will show that the wait_timeout variable is reset to the
value set at server start.

The other way is to configure my.cnf with the wait_timeout variable set to 2147484. This
will cause every client connection to be lost if not queries are repeated with very short
intervals.

Suggested fix:
-

Thank you for the bug report I was able to repeat.

Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.

If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information 
about accessing the source trees is available at
    http://www.mysql.com/doc/en/Installing_source_tree.html

Additional info:

I have now limited the wait_timeout on windows to 2147483 seconds.