This problem is now resolved in CA Performance Management 3.6.0, and in release 3.5.0 with the installation of the June monthly update kit:
Symptom: The Data Collector would stop collection IPSLA metrics once sysUpTime rolled over on a device.
Resolution: Refactored dynamic index discovery logic to correctly handle sysUpTime rollover and continue collecting metrics.
If encountering this problem, to receive the CA PM 3.5.0 June update kit, open a support Case to have the installation files made available for download.
This will bring CA PM components to the following build versions:
CA Performance Center 126.96.36.1992
CA Data Aggregator 188.8.131.522