eucalyptus-cloud.service 4.4.4 constantly crashing with JVM memory errors - eucalyptus

Question

I'm trying to work through the manual installation guide. When I get as far as registering an admin account for the console (euare-accountcreate) or registering services (euserv-register-service) the eucalyptus-cloud service inconsistently crashes with the same JVM memory error. As an example a few times I've been able to register the UFS or create the admin account but when I move on to perform another step in the install it will fail and checking the service status shows that it has crashed. I don't have experience with Java memory errors and could really use some help understanding whats going on and how to investigate this type of error in general:
[root#cloud ~]# euserv-describe-services ufs-10.0.0.2
euserv-describe-services: error: connection error (('Connection
aborted.', BadStatusLine("''",)))
[root#cloud ~]# systemctl status eucalyptus-cloud -l
● eucalyptus-cloud.service - Eucalyptus cloud web services
Loaded: loaded (/usr/lib/systemd/system/eucalyptus-cloud.service;
enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Wed 2018-10-10 08:45:09 EDT;
4s ago
Process: 45951 ExecStart=/usr/sbin/eucalyptus-cloud $CLOUD_OPTS
(code=exited, status=1/FAILURE)
Main PID: 45951 (code=exited, status=1/FAILURE)
CGroup: /system.slice/eucalyptus-cloud.service
├─46206 /usr/bin/postgres -D /var/lib/eucalyptus/db/data -
h0.0.0.0 -p8777
├─46207 postgres: logger process
├─46209 postgres: checkpointer process
├─46210 postgres: writer process
├─46211 postgres: wal writer process
├─46212 postgres: autovacuum launcher process
└─46213 postgres: stats collector process
Oct 10 08:45:08 cloud eucalyptus-cloud[45951]: OpenJDK 64-Bit Server VM
warning: INFO: os::commit_memory(0x00007f496534b000, 12288, 0) failed;
error='Cannot allocate memory' (errno=12)
Oct 10 08:45:08 cloud eucalyptus-cloud[45951]: #
Oct 10 08:45:08 cloud eucalyptus-cloud[45951]: # There is insufficient
memory for the Java Runtime Environment to continue.
Oct 10 08:45:08 cloud eucalyptus-cloud[45951]: # Native memory
allocation (mmap) failed to map 12288 bytes for committing reserved
memory.
Oct 10 08:45:08 cloud eucalyptus-cloud[45951]: # An error report file
with more information is saved as:
Oct 10 08:45:08 cloud eucalyptus-cloud[45951]: #
/tmp/hs_err_pid45954.log
Oct 10 08:45:09 cloud eucalyptus-cloud[45951]: 2018-10-10 08:45:09
45951 ERROR 0574 Service exit with a return value of 1.
Oct 10 08:45:09 cloud systemd[1]: eucalyptus-cloud.service: main
process exited, code=exited, status=1/FAILURE
Oct 10 08:45:09 cloud systemd[1]: Unit eucalyptus-cloud.service
entered failed state.
Oct 10 08:45:09 cloud systemd[1]: eucalyptus-cloud.service failed.
Edit to include some version info:
[root#cloud ~]# cat /etc/centos-release
CentOS Linux release 7.5.1804 (Core)
[root#cloud ~]# java -version
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)
EDIT to note my point of confusion: This system only has 25G of RAM in use and 223G free. So I need help understanding how java is running out of memory.

Answer 1

try this fix:
echo 1999999 > /proc/sys/vm/max_map_count