Problems with the MemVerge Memory Allocation Service
MVMAS does not start
The MVMAS service, mvmallocd, fails to start.
Cause: MVMAS is already running
The MVMAS service is already running on the system.
Only one mvmallocd process is allowed to run at a time.
Remedy: Check for a running MVMAS service
Procedure
-
Check for a running mvmallocd process on the system:
# systemctl status mvmallocd
The system shows a running process:
# systemctl status mvmallocd ● mvmallocd.service - MemVerge Memory Engine Loaded: loaded (/etc/systemd/system/mvmallocd.service; disabled; vendor preset: disabled) Active: active (running) since Wed 2020-09-23 11:25:41 PDT; 3h 46min ago Process: 22672 ExecStart=/usr/bin/bash /usr/libexec/mvmallocd_daemon_start.sh (code=exited, status=0> Process: 22650 ExecStartPre=/usr/bin/bash /usr/libexec/mvmallocd_pre_check.sh (code=exited, status=0> Main PID: 22684 (mvmallocd) Tasks: 2 (limit: 26213) Memory: 3.7M CGroup: /system.slice/mvmallocd.service └─22684 /opt/memverge/sbin/mvmallocd --config=/etc/memverge/mvmallocd.yml
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Do one of the following:
- If the running MVMAS service is working, do nothing.
- If you think there is a problem with the running MVMAS service, kill the mvmallocd process and start the service again. See Stopping the MemVerge Memory Allocation Service and Starting Data Services.
Cause: Domain socket already exists
Attempting to run the MVMAS service, the following message is logged in the MVMAS log:
cat /var/log/memverge/mvmallocd_log -----NEW MVMLOG FILE 2020-12-29 21:05:40 2020-12-29 21:05:40 -0800 [29153:29153]: License loaded successfully. 2020-12-29 21:05:40 -0800 [29153:29153]: Chunk Usage: (3014 / 64508) 2020-12-29 21:05:40 -0800 [29153:29153]: domain socket /tmp/dpme_daemon.0 already exists
In this example, the /tmp/dpme_daemon.0 socket path already exists.
Remedy: Remove the socket and restart the MVMAS service
Procedure
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Verify that the socket path exists:
# ls /tmp/dpme_daemon.0 /tmp/dpme_daemon.0 # rm /tmp/dpme_daemon.0 # rm: remove socket '/tmp/dpme_daemon.0'? y # ls /tmp/dpme_daemon.0 ls: cannot access '/tmp/dpme_daemon.0': No such file or directory
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Remove the socket path:
# rm -rf /tmp/dpme_daemon.0
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Restart the MVMAS service:
# systemctl start mvmallocd