image cleanup/expiration is deleting files even though retention not met

[Raju_la]

hello,

 we noticing very very strange situation in my NB - but its not across all policies few/random. example

client: prodlinuxsite1  - this client policy retenion is 3 weeks ( here i attach the policy screenshot ) no changed recently at all.

so until today the last incr image retain should be Apr 1 , but u can see below the last incr is 4th.

[root@nbmaster01 ~]# /usr/openv/netbackup/bin/admincmd/bpimagelist -idonly -d 01/01/2015 -e 04/21/2016 -client prodlinuxsite1 | grep -i incr

Time: Thu 21 Apr 2016 04:08:56 PM PD   ID: prodlinuxsite1_1461280136   INCR (1)
Time: Tue 19 Apr 2016 04:02:24 PM PD   ID: prodlinuxsite1_1461106944   INCR (1)
Time: Mon 18 Apr 2016 04:02:02 PM PD   ID: prodlinuxsite1_1461020522   INCR (1)
Time: Sun 17 Apr 2016 04:02:22 PM PD   ID: prodlinuxsite1_1460934142   INCR (1)
Time: Sat 16 Apr 2016 04:01:46 PM PD   ID: prodlinuxsite1_1460847706   INCR (1)
Time: Fri 15 Apr 2016 04:07:06 PM PD   ID: prodlinuxsite1_1460761626   INCR (1)
Time: Thu 14 Apr 2016 04:10:53 PM PD   ID: prodlinuxsite1_1460675453   INCR (1)
Time: Wed 13 Apr 2016 04:02:56 PM PD   ID: prodlinuxsite1_1460588576   INCR (1)
Time: Tue 12 Apr 2016 04:02:26 PM PD   ID: prodlinuxsite1_1460502146   INCR (1)
Time: Mon 11 Apr 2016 04:02:59 PM PD   ID: prodlinuxsite1_1460415779   INCR (1)
Time: Sun 10 Apr 2016 04:03:40 PM PD   ID: prodlinuxsite1_1460329420   INCR (1)
Time: Sat 09 Apr 2016 04:02:04 PM PD   ID: prodlinuxsite1_1460242924   INCR (1)
Time: Fri 08 Apr 2016 04:01:55 PM PD   ID: prodlinuxsite1_1460156515   INCR (1)
Time: Thu 07 Apr 2016 04:01:51 PM PD   ID: prodlinuxsite1_1460070111   INCR (1)
Time: Tue 05 Apr 2016 04:01:27 PM PD   ID: prodlinuxsite1_1459897287   INCR (1)
Time: Mon 04 Apr 2016 04:02:56 PM PD   ID: prodlinuxsite1_1459810976   INCR (1)

and i noticed in admin logs that apr 3 image got deleted - apr 3 is well with in 3 weeks so is anything i mising here ? 

master/media version  7.6.1.2

19:48:13.562 [6093] <2> emmlib_FetchDeletedImageFragments: (0) BackupID = <prodlinuxsite1_1459724503>, MediaID = <@aaaac>, FragmentID = <@aaaac>

[root@nbmaster01 bin]# ./bpdbm -ctime 1459724503
1459724503 = Sun 03 Apr 2016 04:01:43 PM PDT

[Raju_la · Accepted solution]

opened case with veritas - and found below but it make sense now.

" This is working as designed. When the full backupid expires, the incremental backupids that depend on that full also expire"

 there is a technote but currently it is not yet public.

[Marianne]

So... that means that you have missed a Full or it has failed without any attempt to rerun? Not good....