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Special Forums UNIX and Linux Applications Apache+Perl: interruption of STDIN Post 302361373 by sevmax on Tuesday 13th of October 2009 04:42:39 AM
Old 10-13-2009
Question Apache+Perl: interruption of STDIN

Hello dear community!
I have faced with a trouble which I trying to solve for a long time.

I have service of video streaming. And I have web and video roles for servers.
Video servers upload video using SWFUpload and then stream it.
Issue became during uploading of video.
In random time users receive "I/O error", and I have record in database about this failure.
Also I am unable to repeat this error because don't know reasons.

Below are details of system:
CentOS 5 x86_64
Apache
Arch : x86_64
Version: 2.2.3
Release: 11.el5_2.centos.4

Perl
Arch : i386
Version: 5.8.8
Release: 15.el5_2.1

Below is answer I've receive on the same question from SWFUpload forum:
Quote:
There are a few common causes for IO errors. Unfortunately the Flash Player doesn't give any details.

The only way I can think of to log the details is to handle the uploadError event and send the "message" parameter to the server as an ajax request.

Whatever is shown in the message parameter is all the information that Flash gives us.

Most often IO errors are seen:
1. The POST (file size + other post paramters) exceeds the max allowed by the server.
2. The server script execution time exceeds the timeout limit
3. mod_security rejects the upload (because the Flash Player uses a valid but suspicious format for the upload)
4. An error in the page terminates the connection without a response
5. Some other timeout.
6. Anti-virus software.
I don't have #3 mod_security and #6 Anti-virus software on servers.

Is there any way to set timeouts for perl like for php in php.ini?

For Apache there are these settings for timeout:
Timeout 3000
KeepAliveTimeout 1500

Seems it would be enough. Is there any other timeout settings I could set for perl scripts?

Also, I'm using prefork MPM. If I change it for worker MPM could it help someway?

Help please to find the reason of errors.
I'll write any additional details which need to do progress.

Regards,
Maxim
 

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Mail::SpamAssassin::Plugin::Pyzor(3)			User Contributed Perl Documentation		      Mail::SpamAssassin::Plugin::Pyzor(3)

NAME
Mail::SpamAssassin::Plugin::Pyzor - perform Pyzor check of messages SYNOPSIS
loadplugin Mail::SpamAssassin::Plugin::Pyzor DESCRIPTION
Pyzor is a collaborative, networked system to detect and block spam using identifying digests of messages. See http://pyzor.sourceforge.net/ for more information about Pyzor. USER OPTIONS
use_pyzor (0|1) (default: 1) Whether to use Pyzor, if it is available. pyzor_max NUMBER (default: 5) This option sets how often a message's body checksum must have been reported to the Pyzor server before SpamAssassin will consider the Pyzor check as matched. As most clients should not be auto-reporting these checksums, you should set this to a relatively low value, e.g. 5. ADMINISTRATOR OPTIONS
pyzor_timeout n (default: 3.5) How many seconds you wait for Pyzor to complete, before scanning continues without the Pyzor results. You can configure Pyzor to have its own per-server timeout. Set this plugin's timeout with that in mind. This plugin's timeout is a maximum ceiling. If Pyzor takes longer than this to complete its communication with all servers, no results are used by SpamAssassin. Pyzor servers do not yet synchronize their servers, so it can be beneficial to check and report to more than one. See the pyzor-users mailing list for alternate servers that are not published via 'pyzor discover'. If you are using multiple Pyzor servers, a good rule of thumb would be to set the SpamAssassin plugin's timeout to be the same or just a bit more than the per-server Pyzor timeout (e.g., 3.5 and 2 for two Pyzor servers). If more than one of your Pyzor servers is always timing out, consider removing one of them. pyzor_options options Specify additional options to the pyzor(1) command. Please note that only characters in the range [0-9A-Za-z ,._/-] are allowed for security reasons. pyzor_path STRING This option tells SpamAssassin specifically where to find the "pyzor" client instead of relying on SpamAssassin to find it in the current PATH. Note that if taint mode is enabled in the Perl interpreter, you should use this, as the current PATH will have been cleared. perl v5.16.3 2011-06-06 Mail::SpamAssassin::Plugin::Pyzor(3)
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