Same for me. Only restarting openhab seems to help, created a cron job which checks for the error every three minutes and does the restart if necessary.
I use totally different bindings (modbus, tacmi, fritzbox, openweathermap), but also Java on ARM.
Java version is:
openjdk version "11.0.10" 2021-01-19 LTS
OpenJDK Runtime Environment Zulu11.45+27-CA (build 11.0.10+9-LTS)
OpenJDK Client VM Zulu11.45+27-CA (build 11.0.10+9-LTS, mixed mode)
Same problem is also discussed here: Syslog Errors (100 GB) - #7 by manswiss
Posted a workaround there. Also one user reports that the problem is gone with plain openjdk instead of Zulu, trying this also now.