In this chapter you will find known errors, which can appear when installing and running the Datavault Builder. For these common errors, possible resolutions are as well presented.


If your specific error is not covered, please feel free to directly contact us.


In general, all Datavault Builder containers are stateless, as all information is directly stored on the processing database. Therefore, the datavault builder modules (webgui, api, core, scheduler) can be restartet without loosing data. Please be aware, that a restart will cause running loads to fail.


Possible Cause

Possible Resolution


Webgui shows error: Connection error: could not connect to server: Connection refused Is the server running on host and accepting TCP/IP connections on port 5432

The API service is running but has no connection to the core module. And the core module is NOT running

Restart the core container


Webgui shows error: JWT secret not known

The API service is running but has no connection to the core module. But the core module is running

Restart the API container


MSSQL: Error response from daemon: invalid mount config for type “bind”: invalid mount path: ‘$(pwd)/secrets/authenticator_password.txt’ mount path must be absolute. See ‘docker run –help’.

Using PowerShell

Use CMD instead of PowerShell

Client DB

Sqlcmd: Error: Microsoft ODBC Driver 17 for SQL Server : A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information see SQL Server Books Online..

  • localhost does not work with docker

  • MSSQL instance is not recognized.

  • Use host.docker.internal instead of localhost

  • only use the hostname.


Exasol: NOTICE: dvb_core.f_test_fdb_connection_jdbc() = Could not establish connection: SQL Error in DatbaseConnection.getConnection: syntax error, unexpected identifier_chain2, expecting assignment_operator or ‘:’ [line 1, column 13] (Session: 1643732619895821890)

Wrong Exasol version

“Impersonate” is only supported from version 6.1.