After deleting user from the configuration, SSHD cored multiple times and the master routing-engine was switched to the backup routing-engine
Multiple sshd cores are found on routing-engine after mastership switch.
From configuration, delete system login user TEST
admin@trouter1_RE0> show system core-dumps
/var/crash/*core*: No such file or directory
-rw------- 1 2013 wheel 324254 May 4 14:56 /var/tmp/sshd.core.0.gz
-rw------- 1 2013 wheel 324357 May 4 14:56 /var/tmp/sshd.core.1.gz
-rw------- 1 2013 wheel 324243 May 4 14:56 /var/tmp/sshd.core.2.gz
-rw------- 1 2013 wheel 324238 May 4 14:56 /var/tmp/sshd.core.3.gz
-rw------- 1 2013 wheel 324241 May 4 14:56 /var/tmp/sshd.core.4.gz
Problem tracked and resolved with PR1612947. Upgrade to a release where issue is resolved. Here is the link to the PR for your reference:
https://prsearch.juniper.net/problemreport/PR1612947