jdbc "Communications link failure" / Logging myql
Date: May 07, 2013 03:33AM
We are facing a problem. At night we are running several proccesses on a Mysql (Server 5.1.61) and we are getting the exception from jdbc
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 7.200.068 milliseconds ago. The last packet sent successfully to the server was 8.333.893 milliseconds ago.
with nested Exception:
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
Our wait_timeout is set to 8h which should not be exceeded by the proccesses, because they are stopping after ca 2h.
max_connections is set to 800 which also should not be exceeded.
Is there a logging where i can have a look into, what has happened?
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