8.8.6 IMAP failures

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moebius
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Joined: Sat Sep 13, 2014 3:34 am

8.8.6 IMAP failures

Postby moebius » Wed Jan 17, 2018 12:31 am

nginx.log starts showing

Code: Select all

 recv() failed (111: Connection refused) while reading response from upstream


mailbox.log shows no logging at the same time.

PID of mailboxd shows high CPU, but IMAP is unresponsive.
killing PID of mailboxd restores IMAP connectivity and is responsive again.

Problem happens once a day now. Started with 8.8.5, continues with 8.8.6


Klug
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Re: 8.8.6 IMAP failures

Postby Klug » Wed Jan 17, 2018 10:58 am

Is NIO enabled?
moebius
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Re: 8.8.6 IMAP failures

Postby moebius » Wed Jan 17, 2018 5:29 pm

Yes...

Code: Select all

zimbra@svr02-jls:~$ zmlocalconfig | grep nio
nio_imap_enabled = true
nio_max_write_queue_size = 10000
nio_pop3_enabled = true
zimbra_index_lucene_io_impl = nio
zimbra_nio_file_copy_chunk_size_kb = 512
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L. Mark Stone
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ZCS/ZD Version: 8.8.8 Patch 6 Network Edition
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Re: 8.8.6 IMAP failures

Postby L. Mark Stone » Wed Jan 17, 2018 7:34 pm

Single server?

How much RAM, CPU cores and please describe the disks (e.g. 5,400 RPM SATA in RAID6 or all-flash in RAID10, SAN, etc.) and how they were partitioned and formatted.

Thanks,
Mark
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rui
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Re: 8.8.6 IMAP failures

Postby rui » Fri Jan 19, 2018 12:27 pm

moebius wrote:nginx.log starts showing

Code: Select all

 recv() failed (111: Connection refused) while reading response from upstream


mailbox.log shows no logging at the same time.

PID of mailboxd shows high CPU, but IMAP is unresponsive.
killing PID of mailboxd restores IMAP connectivity and is responsive again.

Problem happens once a day now. Started with 8.8.5, continues with 8.8.6



We have a similar symptom with 8.8.5
moebius
Posts: 17
Joined: Sat Sep 13, 2014 3:34 am

Re: 8.8.6 IMAP failures

Postby moebius » Tue Jan 23, 2018 4:34 pm

Just to be clear on your requests for disks/cpu/ram... This Zimbra box has worked for years without this issue until the 8.8.5 release.

RAM 32G
8 E5-2643 cores @ 3.3 Ghz under VMware
Vmware host, with a datastore backed by a 6-drive ZFS Raid Z2 array with SSD read/write caching plus Vmware virtual flash cache.

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