(errno = 1) Errno 1 is permission denied. On CentOS 6.x this is usually resolved by adding the Group ID (GID) of the server to /proc/sys/vm/hugetlb_shm_group. In your case the server runs as user dsuser and group dsuser.
(errno = 12) This indicates a conflict with limits.conf. To resolve this conflict, add these 2 lines in /etc/security/limits.conf: * soft memlock unlimited * hard hemlock unlimited
(errno = 22) There is not enough huge pages available, or you do not have permission to access them.
Remember to give the user access to call the memlock system calls in /etc/security/limits.conf
After you have resolved any of these issues... Restart DS and you should not see any JDK VM warnings in server.out and large page support will be enabled. This is unlikely the root cause but it will provide performance improvements seen when using LargePages.