The RPD core is generated when the 'show bgp statistics' command is executed.

Mar 6 03:18:22.087 MX960 mgd[18022]: UI_CMDLINE_READ_LINE: User 'Juniper', command 'show bgp statistics 
Mar 6 03:20:58.789 MX960 kernel: pid 13633 (rpd), uid 0: exited on signal 11 (core dumped)
Mar 6 03:22:29.663 MX960 dumpd: Core and context for rpd saved in /var/tmp/rpd.core-tarball.0.tgz

The MX960, running on 18.2X75-D67, experiences crashes with RPD core when executing 'show bgp statistics'.

root@MX960> show system core-dumps no-forwarding

/var/crash/*core*: No such file or directory
-rw-rw----  1 root  wheel  313042896 Mar 6  03:22 /var/tmp/rpd.core-tarball.0.tgz
-rw-rw----  1 root  wheel  342604516 Mar 6  07:23 /var/tmp/rpd.core-tarball.1.tgz
/var/tmp/pics/*core*: No such file or directory
/var/crash/kernel.*: No such file or directory
/var/jails/rest-api/tmp/*core*: No such file or directory
/tftpboot/corefiles/*core*: No such file or directory
total files: 2

Mar  6 03:18:22.087  MX960 mgd[18022]: UI_CMDLINE_READ_LINE: User 'Juniper', command 'show bgp statistics 
Mar  6 03:20:58.789  MX960 kernel: pid 13633 (rpd), uid 0: exited on signal 11 (core dumped)
Mar  6 03:22:29.663  MX960 dumpd: Core and context for rpd saved in /var/tmp/rpd.core-tarball.0.tgz

Explanation:
RPD core is noticed after 'show bgp statistics' on MX router.

• Verify if there have been any recent changes made to the device configuration or software.
• Gather CPU utilization graphs prior to the occurrence of the issue.
• Additionally, collect the outputs for the following commands:

>set task accounting on
# Do below 5x show commands, every 30sec for the total time of 15-20min
>show task accounting
>show task accounting details
>show system process extensive
>show task memory detail
>show task jobs
>show task jobs detail

 once done, disable accounting
>set task accounting off
 

Workaround:
Workaround is to upgrade the Junos to fixed version