MYSQL error: Deadlock found when trying to get lock; try restarting transaction. What does this mean?

MySQL Error - 1213 Deadlock found when trying to get lock; try restarting transaction
DELETE FROM upsl WHERE ipaddress = '100.x.x.x'

I saw this error this morning, I have no idea what it means. Upsl is a innodb table, with lotsa updates. Anyone have an idea?

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UmeshSenior Principal Technical Support EngineerCommented:
Below link may explain you very clearly about the error..

BTW, Whats your tx_isolation?

Please gimme the output of

SELECT @@global.tx_isolation;
SELECT @@tx_isolation;


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OctalysAuthor Commented:



Thanks for the link. I am reading it now
OctalysAuthor Commented:
I still dont fully understand it. Been using MySQL over 5 years, I never had any locking problem. And I am doing pretty simple things with this table.

Update, Update, Update etc etc, Sleep 1 second then Delete row.
UmeshSenior Principal Technical Support EngineerCommented:
Which versions you were using earlier? which engines your were using?

Can you post the output of below commands

show global status;
show global variables;
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MySQL Server

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