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Error on ibdata1...

deadmanalivedeadmanalive ContributorCurrent User Role Beginner
Hello experts,
I found sudden error in error logs. Please let me know how to resolve it.

InnoDB: Unable to lock ./ibdata1, error: 11
[Note] InnoDB: Check that you do not already have another mysqld process using the same InnoDB data or log files.


  • mirfanmirfan Database Administrator Inactive User Role Beginner

    It look likes you are running two mysql instances on same port. Check with

    $ ps -aux | grep -v grep | grep mysql

    Kill the processes and start mysqld again.
  • deadmanalivedeadmanalive Contributor Current User Role Beginner
    Hi Mirfan,
    I check the process but there is only one process is running . I had checked logs & found couple of time same error occur. During that time mysql is running fine & only single process was running.

    Is there any other way to debug ?

    During process monitoring i found a single user was connected multiple time and chocking the connection cause max_connection reached error & doing nothing. Command were in Sleep state & info were NULL.(this may not be db issue). Why this situation error ?
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