Slow IMAP after Upgrade 8.8.15

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ThyTe
Posts: 4
Joined: Tue Jul 16, 2019 6:29 pm

Slow IMAP after Upgrade 8.8.15

Postby ThyTe » Sat Oct 19, 2019 2:39 pm

After update from 8.8.15 OSE to P1 we start to get customers complaining about sync IMAP timeout using Outlook.
This happens specially with large accounts with 20Gb and above. As bigger the mailbox worse it gets.

Testing we figure that deleting the account from Outlook and starting from scratch use to help, I mean, the first time it seems to work, but then in a couple of days timeout show again.

Logs just show this kind of error showing it like it was a client issue:

imap - dropping connection for user example1@domain.net (LOGOUT)

We know for a fact that that's not a client side issue because we have a lot of customers with the same error that starts on the same time, just after the update.

Some others colleges that also run Zimbra servers have related the very same situation.

Is any of you passing through the same situation?


ThyTe
Posts: 4
Joined: Tue Jul 16, 2019 6:29 pm

Re: Slow IMAP after Upgrade 8.8.15

Postby ThyTe » Tue Oct 22, 2019 5:30 pm

Anyone with this problem?
ThyTe
Posts: 4
Joined: Tue Jul 16, 2019 6:29 pm

Re: Slow IMAP after Upgrade 8.8.15

Postby ThyTe » Mon Nov 18, 2019 11:14 pm

No one with this problem?
User avatar
axslingr
Outstanding Member
Outstanding Member
Posts: 217
Joined: Sat Sep 13, 2014 2:20 am
ZCS/ZD Version: 8.8.15_GA_3829.RHEL7_64_20190718141

Re: Slow IMAP after Upgrade 8.8.15

Postby axslingr » Tue Nov 19, 2019 12:48 pm

Outlook is a POS. Try an account in Thunderbird and see if it's still slow.

Lance
zelze
Posts: 1
Joined: Wed Mar 11, 2020 2:22 pm

Re: Slow IMAP after Upgrade 8.8.15

Postby zelze » Wed Mar 11, 2020 2:32 pm

Thunderbird have the same problem: Zimbra IMAP4rev1 server closing connection and in zimbra log we can see: imap - NIO:dropping connection for user example@dominio (server-initiated)

zimbraImapNumThreads: 300

zimbraImapMaxConnections: 500

Any ideas?????????????????

I need some help about this issue.
yeeP6rai
Posts: 40
Joined: Mon Feb 12, 2018 10:16 am

Re: Slow IMAP after Upgrade 8.8.15

Postby yeeP6rai » Wed Apr 15, 2020 11:02 am

I've this issue too

Code: Select all

Release 8.8.15_GA_3829.RHEL7_64_20190718141144 RHEL7_64 FOSS edition, Patch 8.8.15_P8.


Total accounts: 240

Code: Select all

[zimbra@email ~]$ zmprov gs `zmhostname` zimbraImapNumThreads
zimbraImapNumThreads: 200

[zimbra@email ~]$ zmprov gs `zmhostname` zimbraImapMaxConnections
zimbraImapMaxConnections: 600

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