Java versions 11.0.0 -11.0.7 are not recommended due to Java bug: JDK-8241054. We recommend to upgrade Java 11 to 11.0.8 or later.
The bug JDK-8241054 causes a high CPU usage when APNS’s HTTP/2 API is used at Brekeke product under Java 11.
Affected Brekeke products and versions:
Brekeke PBX version 22.214.171.124 and later
Brekeke SIP Server version 126.96.36.199 and later
Use Java 11.0.8 or later.