"No data recieved" - sometimes
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What's your hosting environment?
An empty response suggests a 500 server error. If you open your browser's console to inspect the response what is the HTTP status code? 200? 500? Try enabling PHP errors in your .htaccess file for a more verbose output:
php_flag display_errors 1
An entirely blank page? I had that on a system that didn't have curl installed, it was a while ago though.
As a point of interest, that happens to me quite a lot on this site too!
No errors on the server apparently, the webhost guy showed me the log
Chrome says:
Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data.
This only happens on the staging server, not locally where i run MAMP
Some info from phpinfo:
System FreeBSD dns.webtic.nl 9.0-RC3 FreeBSD 9.0-RC3 #0: Sun Dec 4 08:56:36 UTC 2011 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 Build Date Feb 8 2012 16:02:21 SERVER_SOFTWARE Apache/2.2.21 (Unix) mod_ssl/2.2.21 OpenSSL/0.9.8q DAV/2 mod_wsgi/3.3 Python/2.7.2 PHP/5.3.10 PHP Version 5.3.10 SETTINGS: allow_call_time_pass_reference On On allow_url_fopen On On allow_url_include Off Off always_populate_raw_post_data Off Off arg_separator.input & & arg_separator.output & & asp_tags Off Off auto_append_file no value no value auto_globals_jit On On auto_prepend_file no value no value browscap no value no value default_charset no value no value default_mimetype text/html text/html define_syslog_variables Off Off disable_classes no value no value disable_functions no value no value display_errors On On display_startup_errors Off Off doc_root no value no value docref_ext no value no value docref_root no value no value enable_dl On On error_append_string no value no value error_log /tmp/php.errors /tmp/php.errors error_prepend_string no value no value error_reporting 30719 30719 exit_on_timeout Off Off expose_php On On extension_dir /usr/local/lib/php /usr/local/lib/php file_uploads On On highlight.bg #FFFFFF #FFFFFF highlight.comment #FF8000 #FF8000 highlight.default #0000BB #0000BB highlight.html #000000 #000000 highlight.keyword #007700 #007700 highlight.string #DD0000 #DD0000 html_errors On On ignore_repeated_errors Off Off ignore_repeated_source Off Off ignore_user_abort Off Off implicit_flush Off Off include_path .:/usr/local/lib/php .:/usr/local/lib/php log_errors On On log_errors_max_len 1024 1024 magic_quotes_gpc On On magic_quotes_runtime Off Off magic_quotes_sybase Off Off mail.add_x_header Off Off mail.force_extra_parameters no value no value mail.log no value no value max_execution_time 30 30 max_file_uploads 20 20 max_input_nesting_level 64 64 max_input_time -1 -1 max_input_vars 1000 1000 memory_limit 256M 256M open_basedir no value no value output_buffering 0 0 output_handler no value no value post_max_size 640M 640M precision 14 14 realpath_cache_size 16K 16K realpath_cache_ttl 120 120 register_argc_argv On On register_globals Off Off register_long_arrays On On report_memleaks On On report_zend_debug On On request_order no value no value safe_mode Off Off safe_mode_exec_dir /usr/local/php/bin /usr/local/php/bin safe_mode_gid Off Off safe_mode_include_dir no value no value sendmail_from no value no value sendmail_path /usr/sbin/sendmail -t -i /usr/sbin/sendmail -t -i serialize_precision 17 17 short_open_tag On On SMTP localhost localhost smtp_port 25 25 sql.safe_mode Off Off track_errors Off Off unserialize_callback_func no value no value upload_max_filesize 4096M 4096M upload_tmp_dir no value no value user_dir no value no value user_ini.cache_ttl 300 300 user_ini.filename .user.ini .user.ini variables_order EGPCS EGPCS xmlrpc_error_number 0 0 xmlrpc_errors Off Off y2k_compliance On On zend.enable_gc On On LIBXML libXML support active libXML Compiled Version 2.7.8 libXML Loaded Version 20708 libXML streams enabled
Anything else that could be relevant?
thanks a bunch for any idea on how to start debugging this thing J
ah, sorry about the formatting...
One in ten page views (or one in twenty) i get "No data recieved"
Can you actively reproduce this? So when you hit refresh 20 times, you will get this empty result? If so, I would add a tail to the access and error logs of the webserver and the PHP error log and see if your request actually is processed by the web server (access log) and if there is any error reported (error logs).
If live monitoring is not possible, ask for both PHP error log as well as webserver logs to analyse the problem. Your PHP log level is everything except E_STRICT, so that seems to be fine. I would take an extra look at the webserver logs, maybe something is going wrong with the requests.
Thanks for the input.
I can't reproduce it by clicking a lot. It happens quite seldom, and no php errors seemingly. So this could be on the apache level. I'm trying to deal with this together with the hosting company currently, I'll post back as soon as I know more
Okay, this isn't a very satisfying follow-up. But, after switching to a different server by the hosting company, i didn't have this issue anymore. So likely it didn't have anything to do with symphony. But it will probably remain a mystery what exactly was going on.
Thanks for the input J
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One in ten page views (or one in twenty) i get "No data recieved" (empty response) on my symphony website. Anyone bumped into this before? I'm not entirely sure where to start looking for the source of the problem.
thanks for any eventual input, J