abh1sar commented on issue #12067:
URL: https://github.com/apache/cloudstack/issues/12067#issuecomment-3701660017
There is a bug in setup/bindir/cloud-sysvmadm.in due to which if number of
routers is more than 10 (default value of maxthreads), the script hangs forever.
@tatay188 As a workaround, you can change maxthreads (-t) while running the
script to avoid the hang.
```
The tool for stopping/starting running system vms and domain routers. It
requires integration API port to be enabled.
Usage: %s: [-d] [-u] [-p] [-m] [-s] [-r] [-a] [-n] [-t] [-l] [-z] [-v]
[-i] [-j]
-d - cloud DB server ip address, defaulted to localhost if not specified
-u - user name to access cloud DB, defaulted to \"root\" if not specified
-p - cloud DB user password, defaulted to no password if not specified
-m - the ip address of management server, defaulted to localhost if not
specified
-s - stop then start all running SSVMs and Console Proxies
-r - stop then start all running Virtual Routers
-a - stop then start all running SSVMs, Console Proxies, and Virtual
Routers
-n - restart all Guest networks
-t - number of parallel threads used for stopping Domain Routers. Default
is 10
-l - log file location. Default is cloud.log under current directory
-z - do restart only for the instances in the specific zone. If not
specified, restart will apply to instances in all zones
-v - do restart all VPCs in the entire system
-i - do restart on instances with specific IDs. Comma-separated instance
IDs to be provided. Works only when restarting SSVMs, CPVMs or VRs
-j - do restart on instances from the specified database table. If not
specified, restart will apply on instances present in cloud.vm_instance
database table. Works only when restarting SSVMs, CPVMs or VRs\n\n"
```
Basically for it to not hang, either
1. maxthreads should be more than equal to number of routers, or
2. maxthreads should be a factor of number of routers
e.g, if number of routers is 22, then maxthreads should be 2, 11 or 22 and
above)
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