The Database Is Down
Read this chapter to learn more about what to do if the database is down due to a planned or unplanned shutdown.
Procedure
In the event of a planned shutdown of the database, it should also be restarted again using this command:
adastart <dbid>
In case of an unplanned shutdown, it's necessary to search for error messages in the database log file named:
adanuc.log
Different causes of a disorder are possible, such as:
Data Volume Issues
Network Problems
Firewall Rules
Parameter Settings
License Limitations
With the development of the cluster solution, we have also improved error logging. All Adabas cluster API relevant messages contain the keyword ADAADC, the pure cluster-node communication relevant messages contain the keyword WSREP.
Also, see chapter
Provider Library for
INFO related messages as well as the new server parameter
CLUSTER_LOG_LEVEL.
For example, in the case of a non-existent or invalid license file, the following message can be found in the logfile:
...
2022-07-18 15:20:24 %ADANUC-W-LICCLUINVALID, Due to license restrictions, Adabas cluster mode is not available.
...
Note:
If a node should become part of an existing cluster again, the parameter
CLUSTER_BOOTSTRAP must not be set as already mentioned in chapter
Restart after planned shutdown .