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

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

尝试此修复程序：

    echo 1999999 > /proc/sys/vm/max_map_count