In case of errors or other problems when installing and running LabKey Server, first review installation basics and options linked on the Install LabKey
Running a server in "devmode" provides enhanced logging and enables the MiniProfiler
. To run the server in devmode, follow these steps. The supported version of tomcat
will change over time; replace the # in our examples with the actual version number.
- Open a command prompt.
- Go to the <CATALINA_HOME>/bin directory, for example:
- Execute the tomcat#w.exe program:
- The command will open a program window. Click the Java tab.
- In the Java Option box, scroll to the bottom of the properties. Add the following property at the bottom of the list:
- Close the program window and restart the server.
- To confirm that the server is running in devmode:
- Go to (Admin) > Site > Admin Console.
- Click Admin Console Links.
- Under Diagnostics, click System Properties.
- Locate the devmode property, and confirm that its value is 'true'.
Which Version of LabKey Server Is Running?
- Find your version number at (Admin) > Site > Admin Console.
- Click Module Information.
- Click the (Expand) icon for the Core module. The Version is the version number for your installation of LabKey Server.
Before installing LabKey Server, you should shut down all other running applications. If you have problems during the installation, try additionally shutting down any virus scanning application, internet security applications, or other applications that run in the background.
Compatible Component Versions
Confirm that you are using the supported versions of the required components, as detailed in the Supported Technologies Roadmap
. It is possible to have multiple versions of some software, like Java, installed at the same time. Check that LabKey and other applications, such as Tomcat, are configured to use the correct versions.
You may need to remove references to Cygwin from your Windows system path before installing LabKey, due to conflicts with the PostgreSQL installer. The PostgreSQL installer also conflicts with some antivirus or firewall software programs. (see http://wiki.postgresql.org/wiki/Running_%26_Installing_PostgreSQL_On_Native_Windows
for more information).
Tomcat Failure to Start
If installation fails to start tomcat (such as with an error like "The specified service already exists."), you may need to manually stop or delete a failing Tomcat service.
To stop the service on Windows, open Control Panel > Administrative Tools > Services
. Select the relevant service, such as LabKey Server Apache Tomcat #.0
and click Stop
To delete, run the following from the command line as an administrator, substituting the major version number for the #:
Connection Pool Size
If your server becomes unresponsive, it could be due to the depletion of available connections to the database. Watch for a Connection Pool Size
of 8, which is the Tomcat connection pool default size and insufficient for a production server. To see the connection pool size for the LabKey data source, select (Admin) > Site > Admin Console
and check the setting of Connection Pool Size
on the Server Information
panel. The connection pool size for every data source is also logged at server startup.
To set the connection pool size, edit your labkey.xml configuration file and change the appropriate setting for your LabKey data source to at least 20. Depending on the number of simultaneous users and the complexity of their requests, your deployment may require a larger connection pool size. The setting name depends on your Tomcat version
- Tomcat 7: the setting to change is called "maxActive".
- Tomcat 8 and later: the setting to change is called "maxTotal".
You should also consider changing this setting for external data sources to match the usage you expect.
The Tomcat data source connection pool settings changed significantly in Tomcat 8, so you must change your data source settings when you upgrade from Tomcat 7 to a later version
. The most important change is to replace your "maxActive" setting (used with Tomcat 7) with "maxTotal". Review the Database Connection Pooling section of the Tomcat Migration Guide
for more information. See External Schemas and Data Sources
for details and data source configuration examples.
Restart Installation from Scratch
If you have encountered prior failed installations, don't have any stored data you need to keep, and want to clean up and start completely from scratch, the following process may be useful:
- Delete the Tomcat service (if it seems to be causing the failure):
- From the command line (may need to run as administrator):
- Uninstall PostgresSQL using their uninstaller.
- Control Panel > Programs and Features
- Select PostgreSQL program.
- Click Uninstall.
- Delete the entire LabKey installation directory.
- Install LabKey again.
You can search for problems resolved through community support in the LabKey Installation Forum
If you don't see your issue listed there, you can post a new question. If the install seems successful, it is often helpful to submit debugging logs
If the install failed to complete, please include the install.log and install-debug.log from your selected LabKey install directory.
PostgreSQL logs its installation process separately. If PostgreSQL installation/upgrage fails, please locate and include the PostgreSQL install logs as well.