{section: Upgrading to 8.9.12}
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+***UPDATE! On March 26 2021 at 3:30pm the HTCondor v8.9.12 release was pulled down from our website after a significant backwards-compatibility problems were discovered. We plan to fix these problems in v8.9.13 to be released by March 30. We apologize for any inconvenience.***
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HTCondor 8.9.12 has introduced many security improvements. As a result, the HTCondor team expects that after upgrading from an earlier version of 8.9 to v8.9.12, explicit administrator intervention will be required for many pools. If you're upgrading from v8.8 or earlier, we strongly recommend waiting until mid-April 2021 for the release of HTCondor v9.0.
This document explains, in order of likelihood, how you may need to intervene when upgrading your pool from an earlier HTCondor v8.9.x, and what that intervention might be. For example, if after upgrading, you cannot see your pool via _condor_status_ as before, it is likely a problem discussed here. A given pool might require multiple interventions, so please check each of the conditions after each heading below.
