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imap failures with odd Service Check Method: [tcp connect]

Discussion in 'General Discussion' started by caeos, Dec 17, 2008.

  1. caeos

    caeos Well-Known Member

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    all i can do is report the following code, not sure where to start.

    Code:
    imap failed @ Wed Dec 17 04:36:25 2008. A restart was attempted automagically.
    Service Check Method:  [tcp connect] 
    
    Failure Reason: TCP Transaction Log: 
    << * OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2008 Double Precision, Inc.  See COPYING for distribution information.
    >> A001 LOGIN __cpanel__service__auth__imap__fbLhliyoGycys72YXIjF55mQDhH5A17lf5dQpMeWBWqEePDFiZysGJN8MTrSdxTJ cx60piNsV_Yq7ChpLSqZsV1fKDHJ0DVNuteb__WtaBFUfGS4SHiovxuumWxggPCJ
    << * BYE Temporary problem, please try again later
    imap: ** [* BYE Temporary problem, please try again later != A001 OK]
     
  2. abrender

    abrender Active Member

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    Since the major cpanel upgrade a few nights ago we're seeing this sporadically as well on 2 servers - we can't reproduce it all the time
    Code:
    imap failed @ Sat Dec 20 00:18:56 2008. A restart was attempted automagically.
    Service Check Method:  [tcp connect] 
    
    Failure Reason: TCP Transaction Log: 
    << * OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2008 Double Precision, Inc.  See COPYING for distribution information.
    >> >> A001 LOGIN __cpanel__service__auth__imap__PNIT3F....NZI
    << * BYE Temporary problem, please try again later
    imap: ** [* BYE Temporary problem, please try again later != A001 OK]
    
    
    Cmd Service Check Raw Output: 
    
    /var/log/maillog shows:
    Dec 20 06:17:20 SERVERNAME imapd: authentication error: Input/output error

    Any ideas of what we should check?
     
    #2 abrender, Dec 20, 2008
    Last edited: Dec 20, 2008
  3. jdlightsey

    jdlightsey Perl Developer III
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    This just indicates that chkservd couldn't complete this particular login with the IMAP server. This might happen because the server was very heavily loaded at the time, because Courier has poor configuration settings, or for no really good reason at all.

    I wouldn't worry about occasional failures of the new checkservd authentication checks, but if you that the failures are consistently repeated and frequent, it's worth looking into further. If you'd like to open a ticket we can take a closer look at your system to see if there is any identifiable pattern in the failures.
     
  4. abrender

    abrender Active Member

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    Hi,

    We're seeing this on 3 servers (all in OpenVZ vps's if that matters). It's not just random chkservd failings, customers are being promped for passwords because random AUTHs fail.

    In /var/log/maillog we see:
    Dec 20 06:17:20 SERVERNAME imapd: authentication error: Input/output error
     
  5. sirotex

    sirotex Well-Known Member

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    Hello,

    We're running 11.24 builds and are not getting these errors.
     
  6. abrender

    abrender Active Member

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    Yup, we have many servers running with no problem, but 3 with this "imapd: authentication error: Input/output error" error
     
  7. abrender

    abrender Active Member

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  8. sirotex

    sirotex Well-Known Member

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    Are you running Courier or Dovecot?
     
  9. abrender

    abrender Active Member

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    Courier - we don't want to switch to dovecot yet - we'd rather fix this problem instead of avoid it by using different software

    Thanks
     
  10. sirotex

    sirotex Well-Known Member

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    I see. We switched to Dovecot when moving to 11.24 Builds.
     
  11. jdlightsey

    jdlightsey Perl Developer III
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    If you see these types of authentication failures repeated frequently, please open a ticket marked "ATTN: JD" so we can get a closer look at what's happening here.
     
  12. abrender

    abrender Active Member

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    we saw 600/day on one server and 8000 on another after the big upgrade. I've changed them to dovecot and it looks okay now). Is this a known or reported issue?
     
  13. habakuk

    habakuk Member

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    Got a similar problem with imap

    Hi,

    since an hour got these mails all ten minutes. can´t get this to fix, whats happend?

    Code:
    imap failed @ Tue Dec 23 01:13:14 2008. A restart was attempted automagically.
    Service Check Method:  [tcp connect] 
    
    Failure Reason: TCP Transaction Log: 
    << * OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2008 Double Precision, Inc.  See COPYING for distribution information.
    >> A001 LOGIN __cpanel__service__auth__imap__QQkfuINM7FYn9ivM5SHxjppVKiJSy_BCUu_gzi_A0HJ05mHiT0aPAC09n0aTiUhC 6xQntoqSkI7OflLn1IjVISb3NFopYTUvgzfImgbatb2c2ATudb0eJ33Kk70LqGmQ
    << A001 NO Login failed.
    imap: ** [A001 NO Login failed. != A001 OK]
    
    
    Cmd Service Check Raw Output: 
    
    Actual cPanel:
    cPanel 11.24.4-R32486 - WHM 11.24.2 - X 3.9
    FEDORA 6 i686 on standard

    can someone help?
    thanks
     
  14. mohitmoudgil

    mohitmoudgil Member
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    Hi,

    I am also facing this same problem on many servers. Is there any resolution for this yet ?

    Thanks
     
  15. cPanelDavidG

    cPanelDavidG Technical Product Specialist

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    We pushed out a new RELEASE build today resolves many issues. I recommend updating your cPanel. If you continue to experience issues after updating, please submit a support ticket: http://tickets.cPanel.net/submit.

    You can view detailed information about the contents of this latest update at:

    http://changelog.cPanel.net
     
  16. cPanelNick

    cPanelNick Administrator
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    https://tickets.cpanel.net/submit/
     
  17. mohitmoudgil

    mohitmoudgil Member
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    Hi,

    Still same error after upgrading..Trying Dovecot

    Thanks
     
  18. mohitmoudgil

    mohitmoudgil Member
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    Ok,

    IMAP worked with dovecot, so seems to be some problem with the courier build.
     
  19. gopihere

    gopihere Member

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    >>IMAP worked with dovecot, so seems to be some problem with the courier build.

    How you made IMAP worked wth dovecot?
     
  20. ergochomardito

    ergochomardito Registered

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    You can try upgrading the "Maximum IMAP Connections (Total)" on the WHM". It works for me.
     
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