Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

Error while attempting to read POST data

Discussion in 'EasyApache' started by Nirjonadda, Apr 3, 2017.

  1. Nirjonadda

    Nirjonadda Well-Known Member

    Joined:
    May 8, 2013
    Messages:
    615
    Likes Received:
    15
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    I am getting to many notifications from pingdom about Site Down. Down from multiple locations,Reason: Read time out or Connection Timeout. So everyday we are getting website down for 5/6 time or more. Its not false positive from pingdom. On checking, I got following error in the log file.

    Code:
    [Mon Apr 03 03:37:17.242252 2017] [php7:error] [pid 13527] [client 180.211.252.108:10542] Error while attempting to read POST data: 400, referer: https://www.mysite.com/
[Mon Apr 03 03:39:18.630654 2017] [http2:error] [pid 13529] (103)Software caused connection abort: [client 180.211.252.108:10545] AH02938: h2_stream(6-13): reading data
[Mon Apr 03 03:52:15.069675 2017] [php7:error] [pid 15451] [client 119.30.38.150:45244] Error while attempting to read POST data: 400, referer: https://www.mysite.com/forums/breada.112/
[Mon Apr 03 03:52:28.103030 2017] [php7:error] [pid 15031] [client 27.147.204.12:8746] Error while attempting to read POST data: 400, referer: https://www.mysite.com/forums/self-written.114/
    I was monitoring the server logs and I could see the same error is logged in the log file when the post scripts are executed. Below are the main reasons for the 400 Bad request error.

    Code:
    The 400 status code, or Bad Request error, means the HTTP request that was sent to the server has invalid syntax.

Here are a few examples of when a 400 Bad Request error might occur:

    The user's cookie that is associated with the site is corrupt. Clearing the browser's cache and cookies could
    solve this issue
    Malformed request due to a faulty browser
    Malformed request due to human error when manually forming HTTP requests (e.g. using curl incorrectly)
    we are getting notifications from Pingdom too, however, the VPS is online the whole site so it's either related to Apache.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #1 Nirjonadda, Apr 3, 2017
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,455
    Likes Received:
    1,962
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    Do you notice any similarities with the websites referenced in the error logs? For instance, are the websites using the same PHP application? What PHP handler are you using?

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #2 cPanelMichael, Apr 3, 2017
  3. Nirjonadda

    Nirjonadda Well-Known Member

    Joined:
    May 8, 2013
    Messages:
    615
    Likes Received:
    15
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    I am using XenForo. PHP handler is DSO.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #3 Nirjonadda, Apr 3, 2017
  4. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,455
    Likes Received:
    1,962
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    This seems more like an issue isolated to the PHP script itself, but you are welcome to open a support ticket using the link in my signature if you'd like us to take a closer look and rule out any issues with the cPanel software or configuration.

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #4 cPanelMichael, Apr 3, 2017
  5. Nirjonadda

    Nirjonadda Well-Known Member

    Joined:
    May 8, 2013
    Messages:
    615
    Likes Received:
    15
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    I think this error log happened after enabled mod_http2. Now we have disabled mod_http2 and no error log happening about Error while attempting to read POST data.

    Code:
    [Tue Apr 04 14:04:58.424312 2017] [http2:warn] [pid 7425] [client 80.217.134.61:50412] AH03199: session(1): connection disappeared without proper goodbye, clients will be confused, should not happen
[Tue Apr 04 14:04:59.761533 2017] [mpm_prefork:notice] [pid 7045] AH00169: caught SIGTERM, shutting down
[Tue Apr 04 14:05:52.931751 2017] [core:notice] [pid 2534] SELinux policy enabled; httpd running as context system_u:system_r:unconfined_service_t:s0
[Tue Apr 04 14:05:53.271658 2017] [:notice] [pid 2534] ModSecurity for Apache/2.9.0 (http://www.modsecurity.org/) configured.
[Tue Apr 04 14:05:53.271717 2017] [:notice] [pid 2534] ModSecurity: APR compiled version="1.5.2"; loaded version="1.5.2"
[Tue Apr 04 14:05:53.271725 2017] [:notice] [pid 2534] ModSecurity: PCRE compiled version="8.32 "; loaded version="8.32 2012-11-30"
[Tue Apr 04 14:05:53.271729 2017] [:notice] [pid 2534] ModSecurity: LUA compiled version="Lua 5.1"
[Tue Apr 04 14:05:53.271732 2017] [:notice] [pid 2534] ModSecurity: LIBXML compiled version="2.9.1"
[Tue Apr 04 14:05:53.271735 2017] [:notice] [pid 2534] ModSecurity: Status engine is currently disabled, enable it by set SecStatusEngine to On.
[Tue Apr 04 14:05:53.369934 2017] [lbmethod_heartbeat:notice] [pid 2978] AH02282: No slotmem from mod_heartmonitor
[Tue Apr 04 14:05:53.387591 2017] [http2:info] [pid 2978] AH03090: mod_http2 (v1.8.3, feats=CHPRIO+SHA256+INVHD, nghttp2 1.20.0), initializing...
[Tue Apr 04 14:05:53.425154 2017] [:notice] [pid 2978] mod_ruid2/0.9.8 enabled
[Tue Apr 04 14:05:55.277476 2017] [mpm_prefork:notice] [pid 2978] AH00163: Apache/2.4.25 (cPanel) OpenSSL/1.0.2k mod_bwlimited/1.4 configured -- resuming normal operations
[Tue Apr 04 14:05:55.278157 2017] [core:notice] [pid 2978] AH00094: Command line: '/usr/sbin/httpd'
[Tue Apr 04 14:06:17.806805 2017] [php7:error] [pid 3220] [client 58.97.139.101:62806] Error while attempting to read POST data: 400, referer: https://www.mysite.com/threads/199/page-597
[Tue Apr 04 14:06:17.974568 2017] [php7:error] [pid 3220] [client 58.97.139.101:62806] Error while attempting to read POST data: 400, referer: https://www.mysite.com/threads/199/page-728
[Tue Apr 04 14:08:30.311775 2017] [php7:error] [pid 3769] [client 182.160.117.115:53737] Error while attempting to read POST data: 400, referer: https://www.mysite.com/threads/4624/
[Tue Apr 04 14:12:23.262666 2017] [mpm_prefork:error] [pid 2978] AH00161: server reached MaxRequestWorkers setting, consider raising the MaxRequestWorkers setting
[Tue Apr 04 14:13:16.823085 2017] [php7:error] [pid 3973] [client 58.97.139.101:62864] Error while attempting to read POST data: 400, referer: https://www.mysite.com/threads/15196/
[Tue Apr 04 14:13:43.760318 2017] [php7:error] [pid 3081] [client 58.97.139.101:62809] Error while attempting to read POST data: 408, referer: https://www.mysite.com/threads/199/page-739
[Tue Apr 04 14:15:19.611173 2017] [php7:error] [pid 4517] [client 58.97.139.101:62893] Error while attempting to read POST data: 400, referer: https://www.mysite.com/threads/my.123506/page-2
[Tue Apr 04 14:16:17.259407 2017] [php7:error] [pid 4517] [client 58.97.139.101:62893] Error while attempting to read POST data: 400, referer: https://www.mysite.com/threads/199/page-741
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #5 Nirjonadda, Apr 4, 2017
  6. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,455
    Likes Received:
    1,962
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    Hello,

    You may also want to consider addressing the error message referenced above if the issue continues. You can search for the forums here for the term "server reached MaxRequestWorkers setting" or search elsewhere to see examples of how others have addressed that issue.

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #6 cPanelMichael, Apr 4, 2017
  7. Nirjonadda

    Nirjonadda Well-Known Member

    Joined:
    May 8, 2013
    Messages:
    615
    Likes Received:
    15
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator

    I have set Server Limit to 256 and Max Request Workers to 256. What you are recommended for this MaxRequestWorkers setting?
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #7 Nirjonadda, Apr 5, 2017
  8. cPanelMichael

    cPanelMichael Technical Support Community Manager
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    45,455
    Likes Received:
    1,962
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Twitter:
    The settings you enter depend on your specific server configuration and traffic. You can review a list of system administration service providers if you'd like the help of a qualified system administrator when optimizing your system:

    System Administration Services | cPanel Forums

    Thank you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #8 cPanelMichael, Apr 5, 2017
(You must log in or sign up to post here.)
Loading...
Similar Threads - Error while attempting
  1. linux4me2

    SOLVED An Error Occurred While Attempting To Check Whether Running Executables Are Up-to-Date

    linux4me2, Jul 18, 2017, in forum: General Discussion
    Replies:
    3
    Views:
    725
    cPanelMichael
    Jul 18, 2017
  2. OBorgqvist

    MultiPHP INI Editor Errors occurred while retrieving the PHP INI locations.

    OBorgqvist, Sep 22, 2018, in forum: EasyApache
    Replies:
    6
    Views:
    266
    SushiCatX
    Oct 10, 2018
  3. jockerdz

    SOLVED Error while installing cPanel on centos 7

    jockerdz, Jun 5, 2018, in forum: General Discussion
    Replies:
    4
    Views:
    940
    jockerdz
    Jun 5, 2018
  4. koempeni

    Error while loading shared libraries

    koempeni, May 11, 2018, in forum: General Discussion
    Replies:
    5
    Views:
    494
    cPanelLauren
    Nov 8, 2018
  5. delfinparis

    Create Account - a fatal error or timeout occurred while processing this directive

    delfinparis, Apr 5, 2018, in forum: General Discussion
    Replies:
    2
    Views:
    513
    cPanelLauren
    Apr 6, 2018

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice