Hi

Is anybody able to assist or encountered situation that email missing after indexing. From the logs tracking, it just provide something as sample logs captured below.

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[2017.09.19] 12:05:42 [user@domain.com] Adding user to indexing queue.
[2017.09.19] 12:05:42 [user@domain.com] Adding user to indexing queue.
[2017.09.19] 12:05:45 [user@domain.com] Retreived from queue
[2017.09.19] 12:05:45 [user@domain.com] Marking user as being indexed.
[2017.09.19] 12:05:45 [user@domain.com] Found 512 pending deletes.
[2017.09.19] 12:05:45 [user@domain.com] Found 256 items to index. (Max is 2500)
[2017.09.19] 12:05:51 [user@domain.com] Index committed to disk
[2017.09.19] 12:05:51 [user@domain.com] Unindexed remaining: 0 / 517 (0%)
[2017.09.19] 12:05:51 [user@domain.com] User Indexed
[2017.09.19] 12:05:51 [user@domain.com] User removed from indexing queue
[2017.09.19] 12:05:56 [user@domain.com] Adding user to indexing queue.
[2017.09.19] 12:05:56 [user@domain.com] Not yet in queue, added to queue.
[2017.09.19] 12:05:56 [user@domain.com] Adding user to indexing queue.
[2017.09.19] 12:06:01 [user@domain.com] Retreived from queue
[2017.09.19] 12:06:01 [user@domain.com] Marking user as being indexed.
[2017.09.19] 12:06:01 [user@domain.com] Found 512 pending deletes.
[2017.09.19] 12:06:01 [user@domain.com] Found 0 items to index. (Max is 2500)
[2017.09.19] 12:06:01 [user@domain.com] Index committed to disk

 

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There is confirm no IMAP or POP connection during the time and afterward, user is claimed email missing where had to using the available backup to restore the missing mail. Is any idea this issue could arise and any way to prevent similar situation happen in future.