This KB article helps to troubleshoot a process which is stuck and it is further denying another processes to function.

Killing a 'mgd' process which is stuck and denying other process to execute. Sometimes multiple processes are opened for the same script or for a daemon (for example, mgd) and there is a need to kill some process. Some processes which are consuming high CPU can also be killed from shell.

In the example, a process ID 1062 is stuck starting from 2019-11-30 18:28 UTC. It is a 'mgd' process.
 

lab@ex4300> show system processed extensive | match 1062

 1062 root    1 96  0 46212K  2772K select  0:00 0.00% mgd

Due to a 'mgd' process in a stuck state, the switch was unable to proceed further with the Junos software upgrade process.
 

lab@ex4300> request system software add reboot /var/tmp/jinstall-ex-4300-21.4R2.10-signed.tgz no-validate

ERROR: Another package installation in progress:

user root terminal unknown, process 1062, started at 2019-11-30 18:28 UTC

----Check the Junos installed logs-----
 

lab@ex4300> show log install

2023-10-18 04:02:58 UTC mgd[1864]: /user/libexec/ui/package -X update -reboot /var/tmp/jinstall-ex-4300-21.4R2.10-signed.tgz

<output>

ERROR: Another package installation in progress:

user root terminal unknown, process 1062, started at 2019-11-30 18:28 UTC

</output>

<package-result>1</package-result>

2023-10-18 04:03:53 UTC mgd[1886]: /usr/libexec/ui/package -X update -reboot /var/tmp/jinstall-ex-4300-21.4R2.10-signed.tgz

<output>

ERROR: Another package installation in progress:

From the above log, we understand that the process 1062 is in installation and hence denying another process from processing further.

 

The stuck process can be killed from shell
 

lab@ex4300> start shell user root              

Password:

lab@ex4300:RE:0% kill -9 1062

lab@ex4300:RE:0% exit

Once the stuck mgd process is killed, the Junos code upgrade process can be initiated.