Chrome net ERR INCOMPLETE CHUNKED ENCODING error

Question

For the past two months  I have been receiving the following error on Chrome s developer console   net  ERR INCOMPLETE CHUNKED ENCODING   Symptoms    Pages not loading  Truncated CSS and JS files  Pages hanging    Server environment    Apache 2 2 22 PHP Ubuntu   This is happening to me on our in-house Apache server  It is not happening to anybody else - i e  None of our users are experiencing this problem - nor is anybody else on our dev team   Other people are accessing the exact same server with the exact same version of Chrome  I have also tried disabling all extensions and browsing in Incognito mode - to no effect   I have used Firefox and the exact same thing is occurring  Truncated files and whatnot  The only thing is  Firefox doesn t raise any console errors so you need to inspect the HTTP request via Firebug to see the problem   Response Headers from Apache   Cache-Control no-store  no-cache  must-revalidate  post-check 0  pre-check 0 Connection close Content-Encoding gzip Content-Type text html  charset utf-8 Date Mon  27 Apr 2015 10 52 52 GMT Expires Thu  19 Nov 1981 08 52 00 GMT Pragma no-cache Server Apache 2 2 22  Ubuntu  Transfer-Encoding chunked Vary Accept-Encoding X-Powered-By PHP 5 3 10-1ubuntu3 8   While testing  I was able to fix the issue by forcing HTTP 1 0 in my htaccess file   SetEnv downgrade-1 0   This gets rid of the problem  However  forcing HTTP 1 0 over HTTP 1 1 is not a proper solution   Update  Because I m the only one experiencing this issue  I figured that I needed to spend more time investigating whether or not it was a client side issue  If I go into Chrome s settings and use the  Restore to Default  option  the problem will disappear for about 10-20 minutes  Then it returns

User · Answer

The following should fix it for every client.

//Gather output (if it is not already in a variable, use ob_start() and ob_get_clean() )    

// Before sending output:
header('Content-length: ' . strlen($output));

But in my case the following was a better option and fixed it as well:

.htaccess:

php_value opcache.enable 0

User · Answer

I m pretty sure that this issue can have multiple causes      both on server and on client sides   Recently I faced it with a website I m hosting on VPS  Ubuntu 18 04  PHP 7 4 FPM  nginx   certbot  site is powered by WordPress       admin pages were loaded without CSS JS    It took me few hours to try different solutions  none of which helped   Finally  I discovered  that for some reason  probably it was changed by me earlier  but also I can t exclude possibility it was like this by default  in my  etc nginx nginx conf a first line of this file was commented     user www-data   I uncommented it  restarted nginx with sudo service nginx restart  and the issue was gone   If anyone can check on pristine Ubuntu 18 04 with nginx installed if this line is commented by default     please put it in comments

User · Answer

When i faced this error  while making AJAX call from javascript    the reason was the response from controller was erroneous  it was returning a JSON which was not of valid format

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I just wanted to share my experience with you if someone might has the same problem with MOODLE    Our moodle platform was suddenly very slowly  the dashboard took about 2-3 times longer to load  up to 6 seconds  then usual and from time to time some pages didn t get loaded at all  not a 404 error but a blank page   In the Developer Tools Console the following error was visible  net  ERR INCOMPLETE CHUNKED ENCODING    Searching for this error  it looks like Chrome is the issue  but we had the problem with various browsers  After hours of research and comparing the databases from the days before I finally found the problem  someone turned the Event Monitoring on  However  in the  Config changes  log  this change wasn t visible  Turning Event Monitoring off  finally solved the problem - we had no rules defined for event monitoring    We re running Moodle 3 1 2  with MariaDB and PHP 5 4

User · Answer

I had the same problem with my application  My project uses DevOps and The problem was because of the unhealthy computes  Replacing them fixed the issue for me

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I have redirected from http    to https    and this problem was resolved

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OK  I ve triple-tested this and I am 100  sure that it is being caused by my anti-virus  ESET NOD32 ANTIVIRUS 5     Whenever I disable the Real-Time protection  the issue disappears  Today  I left the Real-Time protection off for 6-7 hours and the issue never occurred   A few moments ago  I switched it back on  only for the problem to surface within a minute   Over the course of the last 24 hours  I have switched the Real-Time protection on and off again  just to be sure  Each time - the result has been the same   Update  I have come across another developer who had the exact same problem with the Real-Time protection on his Kaspersky anti-virus  He disabled it and the problem went away  i e  This issue doesn t seem to be limited to ESET

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This seems like a common problem with multiple causes and solutions  so I m going to put my answer here for anyone who may require it   I was getting net  ERR INCOMPLETE CHUNKED ENCODING on Chrome  osx  php70  httpd24 combination  but the same code ran fine on the production server   I initially tailed the regular logs but nothing really showed up  A quick ls -later showed system log was the latest touched file in  var log  and tailing that gave me   Saved crash report for httpd 99969  version 2 4 16  805   to  Library Logs DiagnosticReports httpd crash   Contained within   Process                httpd  99974  Path                    usr sbin httpd Identifier             httpd Version                2 4 16  805  Code Type              X86-64  Native  Parent Process         httpd  99245  Responsible            httpd  99974  User ID                70  PlugIn Path               usr local opt php70-mongodb mongodb so PlugIn Identifier        mongodb so   A brew uninstall php70-mongodb and a httpd -k restart later and everything was smooth sailing

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I had this problem with a site in Chrome and Firefox  If I turned off the Avast Web Shield it went away  I seem to have managed to get it to work with the Web Shield running by adding some of the html5 boilerplate htaccess to my htaccess file     ------------------------------------------------------------------------------     Expires headers  for better cache control                                      ------------------------------------------------------------------------------    The following expires headers are set pretty far in the future  If you don t   control versioning with filename-based cache busting  consider lowering the   cache time for resources like CSS and JS to something like 1 week    lt IfModule mod expires c gt       ExpiresActive on     ExpiresDefault                                       access plus 1 month       CSS     ExpiresByType text css                               access plus 1 week       Data interchange     ExpiresByType application json                       access plus 0 seconds      ExpiresByType application xml                        access plus 0 seconds      ExpiresByType text xml                               access plus 0 seconds       Favicon  cannot be renamed       ExpiresByType image x-icon                           access plus 1 week       HTML components  HTCs      ExpiresByType text x-component                       access plus 1 month       HTML     ExpiresByType text html                              access plus 0 seconds       JavaScript     ExpiresByType application javascript                 access plus 1 week       Manifest files     ExpiresByType application x-web-app-manifest json    access plus 0 seconds      ExpiresByType text cache-manifest                    access plus 0 seconds       Media     ExpiresByType audio ogg                              access plus 1 month      ExpiresByType image gif                              access plus 1 month      ExpiresByType image jpeg                             access plus 1 month      ExpiresByType image png                              access plus 1 month      ExpiresByType video mp4                              access plus 1 month      ExpiresByType video ogg                              access plus 1 month      ExpiresByType video webm                             access plus 1 month       Web feeds     ExpiresByType application atom xml                   access plus 1 hour      ExpiresByType application rss xml                    access plus 1 hour       Web fonts     ExpiresByType application font-woff                  access plus 1 month      ExpiresByType application vnd ms-fontobject          access plus 1 month      ExpiresByType application x-font-ttf                 access plus 1 month      ExpiresByType font opentype                          access plus 1 month      ExpiresByType image svg xml                          access plus 1 month    lt  IfModule gt     ------------------------------------------------------------------------------     Compression                                                                    ------------------------------------------------------------------------------   lt IfModule mod deflate c gt         Force compression for mangled headers        http   developer yahoo com blogs ydn posts 2010 12 pushing-beyond-gzipping      lt IfModule mod setenvif c gt           lt IfModule mod headers c gt              SetEnvIfNoCase   Accept-EncodXng X-cept-Encoding X 15    15  - 15       gzip deflate  s    s     X -  4 13   HAVE Accept-Encoding             RequestHeader append Accept-Encoding  gzip deflate  env HAVE Accept-Encoding          lt  IfModule gt       lt  IfModule gt         Compress all output labeled with one of the following MIME-types        for Apache versions below 2 3 7  you don t need to enable  mod filter         and can remove the   lt IfModule mod filter c gt   and   lt  IfModule gt   lines        as  AddOutputFilterByType  is still in the core directives        lt IfModule mod filter c gt          AddOutputFilterByType DEFLATE application atom xml                                         application javascript                                         application json                                         application rss xml                                         application vnd ms-fontobject                                         application x-font-ttf                                         application x-web-app-manifest json                                         application xhtml xml                                         application xml                                         font opentype                                         image svg xml                                         image x-icon                                         text css                                         text html                                         text plain                                         text x-component                                         text xml      lt  IfModule gt    lt  IfModule gt     ------------------------------------------------------------------------------     Persistent connections                                                         ------------------------------------------------------------------------------    Allow multiple requests to be sent over the same TCP connection    http   httpd apache org docs current en mod core html keepalive     Enable if you serve a lot of static content but  be aware of the   possible disadvantages     lt IfModule mod headers c gt      Header set Connection Keep-Alive   lt  IfModule gt

User · Answer

Check the nginx folder permission and set appache permission for that   chown -R www-data www-data  var lib nginx

User · Answer

My fix is    lt  php  ob start      gt   lt  DOCTYPE html gt   lt html lang  de  gt              your whole code       lt  html gt   lt  php         ob clean    ob end flush     ob flush       gt    Hope this will help someone in future  and in my case its a Kaspersky issue but the fix above works great

User · Answer

Well  Not long ago I also met this question  And finally I get the solutions which really address this issue   My problem symptoms are also the pages not loading and find the json data was be randomly truncated   Here are the solutions which I summary could help to solve this problem  1 Kill the anti-virus software process 2 Close chrome s Prerendering Instant pages feature 3 Try to close all the apps in your browser 4 Try to define your Content-Length header    lt  php      header  Content-length      strlen  output        gt  5 Check your nginx fastcgi buffer is right  6 Check your nginx gzip is open

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OMG  I solved the same problem 5 minutes ago  I spent several hours to find a solution  At first sight disabling antivirus solved problem on Windows  But then I noticed issue on other linux pc with no antivirus  No errors in nginx logs  My uwsgi showed something about  Broken pipe  but not on all requests  Know what  It was no space left on device  which I found when restarted server on Database log  and df approved this  Only explanation about why antivirus was solved this is that it prevents browser caching  it should check every request   but browser with some strange behavior can simply ignore bad response and show cached responses

User · Answer

The easiest solution is to increase the proxy read timeout for your set proxy location to a higher value  let say 120s  in your nginx conf   location          proxy read timeout 120s          I found this solution here https   rijulaggarwal wordpress com 2018 01 10 atmosphere-long-polling-on-nginx-chunked-encoding-error

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my guess is the server is not correctly handling the chunked transfer-encoding   It needs to terminal a chunked files with a terminal chunk to indicate the entire file has been transferred So the code below maybe work   echo   n   flush    ob flush    exit 0

User · Answer

It is known Chrome problem  According to Chrome and Chromium bug trackers there is no universal solution for this  This problem is not related with server type and version  it is right in Chrome   Setting Content-Encoding header to identity solved this problem to me   from developer mozilla org     identity   Indicates the identity function  i e  no compression  nor   modification     So  I can suggest  that in some cases Chrome can not perform gzip compress correctly

User · Answer

if you can get the proper response in your localhost and getting this error kind of error and if you are using nginx   Go to Server and open nginx conf with   nano etc nginx nginx conf  Add following line in http block   proxy buffering off   Save and exit the file   This solved my issue

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In my case it was happening during json serialization of a web api return payload - I had a  circular  reference in my Entity Framework model  I was returning a simple one-to-many object graph back but the child had a reference back to the parent  which apparently the json serializer doensn t like  Removing the property on the child that was referencing the parent did the trick   Hope this helps someone who might have a similar issue

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I just stared having a similar problem   And noticed it was only happening when the page contained UTF-8 characters with an ordinal value greater than 255  i e  multibyte    What ended up being the problem was how the Content-Length header was being calculated   The underlying backend was computing character length  rather than byte length   Turning off content-length headers fixed the problem temporarily until I could fix the back end template system

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In the context of a Controller in Drupal 8  Symfony Framework  this solution worked for me    response   new Response  form markup  200  array     Cache-Control    gt   no-cache         content    response- gt getContent     contentLength   strlen  content    response- gt headers- gt set  Content-Length    contentLength    return  response    Otherwise the response header  Transfer-Encoding  got a value  chunked   This may be a problem for Chrome browser

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In my case i was having  usr local var run nginx fastcgi temp 3 07 0000000073  failed  13  Permission denied  which was probably resulting the Chrome net  ERR INCOMPLETE CHUNKED ENCODING error   I had to remove  usr local var run nginx  and let nginx create it again     sudo rm -rf  usr local var run nginx    sudo nginx -s stop   sudo mkdir  usr local var run nginx    sudo chown nobody nobody  usr local var run nginx    sudo nginx

User · Answer

The error is trying to say that Chrome was cut off while the page was being sent  Your issue is trying to figure out why   Apparently  this might be a known issue impacting a couple of versions of Chrome  As far as I can tell  it is an issue of these versions being massively sensitive to the content length of the chunk being sent and the expressed size of that chunk  I could be far off on that one   In short  a slightly imperfect headers issue   On the other hand  it could be that the server does not send the terminal 0-length chunk  Which might be fixable with ob flush     It is also possible that Chrome  or connection or something  is being slow  So when the connection is closed  the page is not yet loaded  I have no idea why this might happen   Here is the paranoid programmers answer    lt  php            your code     flush        ob flush        sleep 2       exit 0     gt    In your case  it might be a case of the script timing out  I am not really sure why it should affect only you but it could be down to a bunch of race conditions  That s an utter guess  You should be able to test this by extending the script execution time    lt  php            your while code     set time limit 30              more while code   gt    It also may be as simple as you need to update your Chrome install  as this problem is Chrome specific     https   code google com p chromium issues detail id 461213 IIS  amp  Chrome  failed to load resource  net  ERR INCOMPLETE CHUNKED ENCODING https   wordpress org support topic interface-issue-err incomplete chunked encoding   UPDATE  I was able to replicate this error  at last  when a fatal error was thrown while PHP  on the same localhost  was output buffering  I imagine the output was too badly mangled to be of much use  headers but little or no content    Specifically  I accidentally had my code recursively calling itself until PHP  rightly  gave up  Thus  the server did not send the terminal 0-length chunk - which was the problem I identified earlier

User · Answer

this was happening for me for a different reason altogether  net  ERR INCOMPLETE CHUNKED ENCODING 200 when i inspect the page and go to newtork tab  i see that the vendor js page has failed to load  Upon checking it seems that the size of the js file is big   6 5 mb Thats when i realised that i needed to compress the js  I checked that I was using ng build command to build  Instead when i used ng build --prod --aot --vendor-chunk --common-chunk --delete-output-path --buildOptimizer it worked for me see https   github com angular angular-cli issues 9016

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I had this issue  Tracked it down after trying most the other answers on this question  It was caused by the owner and permissions of the  var lib nginx and more specifically the  var lib nginx tmp directory being incorrect  The tmp directory is used by fast-cgi to cache responses as they are generated  but only if they are above a certain size  So the issue is intermittent and only occurs when the generated response is large  Check the nginx  lt host name gt  error log to see if you are having permission issues  To fix  ensure the owner and group of  var lib nginx and all sub-dirs is nginx  I have also seen this intermittently occur when space on the storage device is too low to create the temporary file  The solution in this case is to free up some space on the device

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Hmmm I just stumbled upon a similar issue but with different reasons behind      I m using Laravel Valet on a vanilla PHP project with Laravel Mix  When I opened the site in Chrome  it was throwing net  ERR INCOMPLETE CHUNKED ENCODING errors   If I had the site loaded on HTTPS protocol  the error changed to net  ERR SPDY PROTOCOL ERROR    I checked the php ini and opcache was not enabled  I found that in my case the problem was related to versioning the asset files - for some reason  it did not seem to like a query string in the URL of the assets  well  oddly enough  just one in particular      I have removed mix version   for the local environment  and the site loads just fine in my Chrome on both HTTP and HTTPS protocols

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I was getting net  ERR INCOMPLETE CHUNKED ENCODING  upon closer inspection of the server error logs I found that it was due to PHP script execution timeout   Adding this line on top of PHP script solved it for me   ini set  max execution time   300     300 seconds   5 minutes   Ref  Fatal error  Maximum execution time of 30 seconds exceeded

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This generally raises when the client sends a burst of requests to the server  next to a client side event    This is generally a sign  of  bad  programming in client side   Imagine I am updating all lines of a table    The bad way is to send a request to update each row  many requests in rafale without waiting for request complete   To correct it   be sure  the request is complete  before sending another one   The good way would  be  to send a request with all updated rows     one request   So  at first  look at what is happening client side and refactoring code if necessary   Use wireshark to identify what goes wrong in requests

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If there are any loop or item which is not existing then you face this issue   When running the App on Chrome  the page is blank and become unresponsive   Scenario Start   Dev Environment  MAC  STS 3 7 3  tc Pivotal Server 3 1  Spring MVC Web   in     myObj getfName      Scenario End   Reason of issue  getfName   function is not defined on the myObj   Hope it help you

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In my case it was issue of html  There was   n  in json response causing the issue  So I removed that

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Here the problem was my Avast AV  As soon I disabled it  the problem was gone    But  I really would like to understand the cause of this behavior

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I had this problem  showing ERR INCOMPLETE CHUNKED ENCODING in Chrome  nothing in other browsers   Turned out the problem was my hosting provider GoDaddy adding a monitoring script at the end of my output    https   www godaddy com community cPanel-Hosting how-to-remove-additional-quot-monitoring-quot-script-added td-p 62592

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In my case  it was a sloppy application issue   An AJAX call is being made to a PHP which had sloppy includes  there was trailing white space after the PHP closing delimiter in two of the includes    This meant that spaces were being output to the response ahead of the expected JSON output   I only discovered this when I put a Header for JSON output just ahead of the response  and the chunking error was replaced by the error that  headers could not be sent because output had occurred    In other words  the AJAX was expecting a JSON response  and it got that - sort of - but the response wasn t clean because a JSON response shouldn t have white ahead of it   This was apparent when looking at the Response from the PHP in Firebug Network - the response looked right justified in the panel because of the leading spaces   Strangely  not all white space triggered the error - the chunking error only occurred when the entire length of the response exceeded some certain length

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I m sorry to say  I don t have a precise answer for you   But I did encounter this problem as well  and  at least in my case  found a way around it   So maybe it ll offer some clues to someone else who knows more about Php under the hood   The scenario is  I have an array passed to a function   The content of this array is being used to produce an HTML string to be sent back to the browser  by placing it all inside a global variable that s later printed    This function isn t actually returning anything   Sloppy  I know  but that s beside the point    Inside this array  among other things  are a couple of elements carrying  by reference  nested associative arrays that were defined outside of this function   By process-of-elimination  I found that manipulation of any element inside this array within this function  referenced or not  including an attempt to unset those referenced elements  results in Chrome throwing a net  ERR INCOMPLETE CHUNKED ENCODING error and displaying no content   This is despite the fact that the HTML string in the global variable is exactly what it should be   Only by re-tooling the script to not apply references to the array elements in the first place did things start working normally again   I suspect this is actually a Php bug having something to do with the presence of the referenced elements throwing off the content-length headers  but I really don t know enough about this to say for sure

User · Answer

In my case it was broken config for mysqlnd ms php extension on the server  Funny thing is that it was working fine on requests with short duration  There was a warning in server error log  so we have fixed it quick

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Fascinating to see how many different causes there are for this issue    Many say it s a Chrome issue  so I tried Safari and still had issues  Then tried all solutions in this thread  including turning off my AVG Realtime Protection  no luck   For me  the issue was my  htaccess file  All it contained was FallbackResource index php  but when I renamed it to htaccess txt  my issue was resolved

User · Answer

I solved this by changing datatype from   js  to   json

User · Answer

This was happening on two different clients  servers separated by several years  using the same code that was deployed on hundreds of other servers for that time without issue   For these clients  it happened mostly on PHP scripts that had streaming HTML - that is   Connection  close  pages where output was sent to the browser as the output became available   It turned out that the connection between the PHP process and the web server was dropping prematurely  before the script completed and way before any timeout   The problem was opcache fast shutdown   1 in the main php ini file  This directive is disabled by default  but it seems some server administrators believe there is a performance boost to be had here  In all of my tests  I have never noted a positive difference using this setting  In my experience  it has caused some scripts to actually execute more slowly  and has an awful track record of sometimes entering shutdown while the script is still executing  or even at the end of execution while the web server is still reading from the buffer  There is an old bug report from 2013  unresolved as of Feb 2017  which may be related  https   github com zendtech ZendOptimizerPlus issues 146  I have seen the following errors appear due to this ERR INCOMPLETE CHUNKED ENCODING ERR SPDY PROTOCOL ERROR Sometimes there are correlative segfaults logged  sometimes not   If you experience either one  check your phpinfo  and make sure opcache fast shutdown is disabled

User · Answer

For me it was caused by insufficient free space on hard drive

[php] Chrome net::ERR_INCOMPLETE_CHUNKED_ENCODING error

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