The upgrade causing the Problem
Upgrade: openjdk-11-jre-headless:amd64 (11.0.9.1+1-1~deb10u2, 11.0.11+9-1~deb10u1), openjdk-11-jre:amd64 (11.0.9.1+1-1~deb10u2, 11.0.11+9-1~deb10u1)
The traccar server log
2021-04-26 08:44:26 INFO: HikariPool-1 - Starting...
2021-04-26 08:44:27 WARN: Registered driver with driverClassName=com.mysql.jdbc.Driver was not found, trying direct instantiation.
2021-04-26 08:44:32 ERROR: HikariPool-1 - Exception during pool initialization. - No appropriate protocol (protocol is disabled or cipher suites are inappropriate) - SSLHandshakeException (... < DataManager:139 < *:89 < Context:292 < Main:110 < ...)
I could undo the openjdk upgrade, but have to find the cause of the problem for future upgrades
apt upgrade openjdk-11-jre-headless=11.0.9.1+1-1~deb10u2 openjdk-11-jre=11.0.9.1+1-1~deb10u2
Looks like the issue is with MySQL connection.
Why are you not using embedded Java?
Yes, it is an issue with the SQL connection. Worked fine for the last years until I upgraded from openjdk 11.0.9 to 11.0.11
We are not using embedded Java because we started with traccar 3.16 without embedded and do manual installations since then.
I see the embedded Java version 11.0.8:
/opt/traccar/jre/bin$ ./java --version
openjdk 11.0.8 2020-07-14 LTS
OpenJDK Runtime Environment 18.9 (build 11.0.8+10-LTS)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.8+10-LTS, mixed mode)
The upgrade causing the Problem
The traccar server log
I could undo the openjdk upgrade, but have to find the cause of the problem for future upgrades