@Albin_Issacif you look at the stack trace the the HashMap throwing the
exception is from Apache Jackrabbit Oak code at
org.apache.jackrabbit.oak.security.authorization.permission.PermissionEntryProviderImpl.loadEntries(PermissionEntryProviderImpl.java:163)
[org.apache.jackrabbit.oak-core:1.8.7] I filed an issue for this, if
possible, please update with more details on the
issue:https://issues.apache.org/jira/browse/OAK-9117