We have AEM 6.3 with SP2+CFP1+CFP2 installed, Few days back some data was migrated using CRX2OAK tool but the system was working perfectly fine. Seems like the server got rebooted without AEM shutdown and when we are starting the AEM server back again, server is not starting properly. I am able to access system/console but crx/de or any other console is not accessible.
Below exception are the exceptions from error.log -
ERROR [FelixStartLevel] c.a.c.d.i.DeserializationFirewallImpl (DeserializationFirewallImpl.java:346) - Unable to load Attach API. Unable to dynamically load deserialization protection agent. This usually happens when running a JRE (instead of a JDK) or a JVM that doesn't provide the Attach API. Please review the AEM Java Deserialization Firewall documentation for how to load the deserialization agent via JVM command line arguments.