Our master database server crashed first time after two years. We are using Debian GNU/Linux 6.0 with Linux 2.6.32-5-amd64. We have updated the MySQL server to 5.5.11 two months ago from MySQL binaries. All of the tables use InnoDB storage engine. The server responds in average 2k query per second.

"wait_timeout" parameter had set to 120 from 300 on the morning of the day the crash happened. The server crashed at the evening and restart itself successfully. We could not find anything significant about the crash. There were nothing unusual, no load, not many connections, not any log query. Is there any chance that the "wait_timeout" parameter caused the crash?

The error log of the server for the crash is attached.

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Emre Hasegeli
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