You can set preferences for Talend Studio to the check for updates of custom libraries on the Nexus server.
From the menu bar, click Window > Preferences to display the [Preferences] dialog box.
Expand the Talend and Performance nodes in succession and then click Nexus settings to display the relevant view.
Set the preferences according to your needs:
In the Timeout for nexus connection (ms) field, specify the time in milliseconds you want your Talend Studio to wait for an interaction with the Nexus server before cutting the connection, 0 for an infinite timeout.
In the Jars check frequency field, specify how often you want your Talend Studio to check for updates:
-1 if you don't want your Talend Studio to check for updates at all.
0 if you want your Talend Studio to check for updates at any action that needs a Jar or Jars, for example when a Job is built or executed from the Studio.
the number of days between two checks.
Click Apply to apply your changes; click OK to validate the settings and close the [Preferences] dialog box.
For more information on installing and configuring Nexus artifact repository, see the Talend Installation Guide.