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How to correct the error “Central Database not reachable” even if you can query the Central DB?.

Solved1.44K views17th August 2020central database
0
João Pereira [SLC]120 14th August 2020 0 Comments

Hi,

A DataMiner running 9.6 CU9 has a MySQL Central Database configured and is currently showing the error \"Central database not reachable\". The database has been migrated to a new machine using the MySQL Workbench Migration Wizard.

The credentials were double-checked and it is possible to query the DB via MySQL Workbench:

The same can be done from within Cube:

Checking the SLDBConnection.txt log shows the following:

I was able to find the same issue reported in task 125205. In this task, the issue was tracked to the character encoding, and changing it from latin1 to UTF-8 corrected the issue.

In my case, checking the encoding shows UTF-8:

Restarting the DataMiner Agent does not clear the error.

What further checks can be performed to find the root cause of the error?

What known root causes for this error could be at play here?

Thank you for your help.

João Pereira [SLC] Selected answer as best 17th August 2020

1 Answer

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Miguel Obregon [SLC] [DevOps Catalyst]18.99K Posted 14th August 2020 2 Comments

Hi João,

Can you double check in the central database if the option sql_mode is set to '':

Once you are connected to the central database through MySQL Workbench, you can find this setting going in the Options File:

João Pereira [SLC] Selected answer as best 17th August 2020
João Pereira [SLC] commented 17th August 2020

Edited the sql-mode from: “STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION”
To: ”
However I am still getting:

2020/08/17 15:17:36.687|SLDBConnection|SLDBConnection|DBG|5|67|Failed forwarding data for ‘dataavg’ table: MySql.Data.MySqlClient.MySqlException (0x80004005): Incorrect integer value: ” for column ‘iId’ at row 1
at SLCassandraClassLibrary.DBGateway.CentralDatabaseManager.ForwardData(SLSql centralConnection, String data)
at SLCassandraClassLibrary.DBGateway.CentralDatabaseManager.ForwardData(SLSql centralConnection)

João Pereira [SLC] commented 17th August 2020

Made the worng edit. I should have used double prime symbols (”) instead of the quoatation marks (“).
In the MySQL Workbench (and here as well) they look similar, but in a text editor they are quite different.
Opening the my.ini file (configuration settings file), it is clear to see it under:
# Set the SQL mode to strict
sql-mode = ”

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