I found agentres-<release numner> jar files under <DT_HOME>\collector\lib. The release numbers are include every release from 4.2 to 6.0. We are currently using dT60.
The question is what's those older version jar file for? Are they design for any older version bootstrap agent in environment? So it can be upgrade through release.
Answer by Christian S. ·
those agentres jars are not needed for bootstrapping, but exactly for the opposite scenario, when somebody is using a non-bootstrapped agent.
you will probably have noticed that those "older" agentres jars are much smaller than the current one. this is because they don't contain the "core" native agent which is required only in the most current version for bootstrapping.