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Error: Scheduler database is down in the Management log

03/26/2020 10 People found this article helpful 195,384 Views

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    Description

    Error: Scheduler database is down in the Management log

    Resolution

    Problem Definition:


    Snippet of the management log:


    We see an error  Scheduler database is down  in management log on a HA device.
     
    Error
    2/20/15 13:20:02 AMC Failure occurred in isJobExistent:Scheduler database is down
    Warning 
    2/20/15 13:17:56 AMC Caught exception while trying to setup the ApplyForm: org.quartz.SchedulerException: Failed to check status of ApplyChangesJob:Scheduler database is down  
    2/20/15 13:17:56 AMC Failure occurred in isJobExistent:Scheduler database is down
    Warning
    2/20/15 13:12:52 AMC Caught exception while trying to setup the ApplyForm: org.quartz.SchedulerException: Failed to check status of ApplyChangesJob:Scheduler database is down.


     
     
    Resolution or Workaround:

     
    It is better to perform the below task in a scheduled downtime window so that any user disconnects can be avoided.
     
    If you are running a cluster need to carry out these steps on both the nodes we should run this command to stop synchronization: mysql -e 'STOP SLAVE;' 

     
     
     
    Mysql troubleshooting

    Truncate the database tables
     
    Maria DB> TRUNCATE TABLE sessionInformation;
    Maria DB> TRUNCATE TABLE failedSignatures;'
    Maria DB> TRUNCATE TABLE accessChecks;
    Maria DB> TRUNCATE TABLE byteCountSnapshots;
    Maria DB> TRUNCATE TABLE epcState;
    Maria DB> TRUNCATE TABLE userLockout;
     

     
    Repair the tables


    mysql -e 'STOP SLAVE;'(only on HA setup)

    Maria DB> repair table byteCountSnapshots;
    Maria DB> repair table sessionInformation;
    Maria DB> repair table failedSignatures;
    Maria DB> repair table accessChecks;
    Maria DB> repair table epcState;
    Maria DB> repair table userLockout;
    Maria DB> quit
     
    And finally on both nodes, to kick-start synchronization:
     
    mysql -e 'RESET MASTER;'
     mysql -e 'RESET SLAVE;'
     /etc/init.d/mysql-replication start



     

    Troubleshooting:

    Refer the /var/log/aventail/management logs for SQL error and database errors.


     

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