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[GH-ISSUE #1879] IMAP server issues #1472
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starred/modoboa-modoboa#1472
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Originally created by @Shae-ai on GitHub (Apr 23, 2020).
Original GitHub issue: https://github.com/modoboa/modoboa/issues/1879
Impacted versions
Steps to reproduce
It's intermittent.
Accessing IMAP via an email client and/or Modoboa's webmail interface.
Current behavior
Without any particular pattern, we receive IMAP server errors from both email clients , Mail, Outlook and Modoboa's own webmail client.
We get: Socket error: EOF from the webmail interface.
Email clients report generic server errors with IMAP.
After waiting minutes, it usually comes back by itself, but then goes "offline" again.
@tonioo commented on GitHub (Apr 24, 2020):
@anthrophitech Please check server logs, you'll have more information about the issue.
@Shae-ai commented on GitHub (Apr 28, 2020):
Thanks Antoine, but when viewing Logs in web interface, there is nothing of help.
Are there logs I can view via SSH that can shed some light on the problem? Where do I look?
Thank-you for your help.
From: Antoine Nguyen notifications@github.com
Sent: Friday, 24 April 2020 20:04
To: modoboa/modoboa modoboa@noreply.github.com
Cc: anthrophitech tech@anthrophi.com; Mention mention@noreply.github.com
Subject: Re: [modoboa/modoboa] IMAP server issues (#1879)
@anthrophitech https://github.com/anthrophitech Please check server logs, you'll have more information about the issue.
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@Shae-ai commented on GitHub (Apr 28, 2020):
I have found the following:
Apr 28 02:13:16 ip-172-31-37-255 dovecot: imap(): Fatal: pool_system_realloc(2097152): Out of memory
Apr 28 02:13:16 ip-172-31-37-255 dovecot: imap(): Fatal: master: service(imap): child 9974 returned error 83 (Out of memory (service imap { vsz_limit=256 MB }, you may need to increase it) - set DEBUG_OUTOFMEM=1 environment to get core dump)
Apr 28 02:13:17 ip-172-31-37-255 dovecot: imap(): Fatal: pool_system_realloc(2097152): Out of memory
Apr 28 02:13:17 ip-172-31-37-255 dovecot: imap(): Fatal: master: service(imap): child 9989 returned error 83 (Out of memory (service imap { vsz_limit=256 MB }, you may need to increase it) - set DEBUG_OUTOFMEM=1 environment to get core dump)
Apr 28 02:13:20 ip-172-31-37-255 dovecot: imap(): Fatal: pool_system_realloc(2097152): Out of memory
Apr 28 02:13:20 ip-172-31-37-255 dovecot: imap(): Fatal: master: service(imap): child 10011 returned error 83 (Out of memory (service imap { vsz_limit=256 MB }, you may need to increase it) - set DEBUG_OUTOFMEM=1 environment to get core dump)
The machine itself has not run out of memory at any point according to monitoring though.
From: Antoine Nguyen notifications@github.com
Sent: Friday, 24 April 2020 20:04
To: modoboa/modoboa modoboa@noreply.github.com
Cc: anthrophitech tech@anthrophi.com; Mention mention@noreply.github.com
Subject: Re: [modoboa/modoboa] IMAP server issues (#1879)
@anthrophitech https://github.com/anthrophitech Please check server logs, you'll have more information about the issue.
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@MrGeneration commented on GitHub (Apr 28, 2020):
You can adjust your dovecot configuration to have a higher vsz_limit as stated by your error message:
Out of memory (service imap { vsz_limit=256 MB }, you may need to increase itI've done the same within my installation. Personally I don't see this as a modoboa bug directly, as this setting highly depends on your needs and 256MB might be perfectly fine for other users.
@tonioo commented on GitHub (Apr 30, 2020):
I do agree with @MrGeneration. Thanks for your reply anyway. I close this issue.