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Intermittent timeouts

Dietmar AustDec 15 2006 — edited Dec 3 2010

Hi guys,

I am continuing the thread from here:
1603780

since this is to treated as a separate issue.

There are many errors like the following in the Apache error_log:

[Thu Dec 14 20:18:01 2006] [error] [client 164.19.153.139] [ecid: 1166123881:10.153.159.47:29376:0:16586,0] File does not exist: /ag/oracle/appserv_1/Apache/Apache/htdocs/_vti_bin/owssvr.dll
[Thu Dec 14 20:18:01 2006] [error] [client 164.19.153.139] [ecid: 1166123881:10.153.159.47:29527:0:15701,0] File does not exist: /ag/oracle/appserv_1/Apache/Apache/htdocs/MSOffice/cltreq.asp
[Thu Dec 14 20:19:23 2006] [error] [client 164.32.1.238] [ecid: 1166123963:10.153.159.47:29527:0:15747,0] mod_plsql: /pls/apex/f HTTP-500 Error Reading Data from Client!!
[Thu Dec 14 21:09:22 2006] [warn] [client 164.20.198.77] read request line timed out
[Thu Dec 14 21:47:20 2006] [warn] [client 164.20.68.139] mod_plsql: Long running URL [pls/apex/wwv_flow.show] timed out
[Thu Dec 14 21:47:20 2006] [error] [client 164.20.68.139] [ecid: 1166128938:10.153.159.47:29490:0:20969,0] mod_plsql: /pls/apex/wwv_flow.show HTTP-500 Error Reading Data from Client!!

I receive the HTTP-500 around 600 times per day intermittently. We have 400,000 page views per day.
It happens throughout the day at various times.

Has anybody had similar problems?

The timeouts in the Apache httpd.conf look good (300 seconds) . And the requests only take a second or two, at most a few seconds before they get aborted.

Marvel.conf:

Alias /i/ "/ag/oracle/appserver_1/apex/images/"
<Directory "/ag/oracle/appserver_1/apex/images/"> 
     AllowOverride None 
     Order allow,deny 
     Allow from all 
     <IfModule mod_expires.c>
      ExpiresActive on
      ExpiresDefault "access plus 1 hour"
     </IfModule>
</Directory>

AddType text/xml       xbl
AddType text/x-component       htc

<Location /pls/apex>
 Order deny,allow
 PlsqlDocumentPath docs
 AllowOverride None
 PlsqlDocumentProcedure      wwv_flow_file_manager.process_download
 PlsqlDatabaseConnectString  RAC_ODS TNSFormat
 PlsqlNLSLanguage            GERMAN_GERMANY.AL32UTF8
 PlsqlAuthenticationMode     Basic
 SetHandler                  pls_handler
 PlsqlDocumentTablename      wwv_flow_file_objects$
 PlsqlDatabaseUsername       APEX_PUBLIC_USER
 PlsqlDefaultPage            apex
 PlsqlDatabasePassword       <pwd for APEX_PUBLIC_USER>
 Allow from all
</Location>

Relevant parts of the http.conf:

ServerType standalone
Timeout 300
KeepAlive off
MaxKeepAliveRequests 100
KeepAliveTimeout 15
MinSpareServers 5
MaxSpareServers 20
StartServers 5
MaxClients 350
MaxRequestsPerChild 0
ExtendedStatus On
Port 80
Listen 80
UseCanonicalName On
HostnameLookups Off
LogLevel warn

We are running the two application servers (IAS 10.1.3) on a Redhat Linux box through a load balancer. The backend is an Oracle RAC 10.2.0.1 on Unix.

Regards,
~Dietmar.

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Locked on Dec 31 2010
Added on Dec 15 2006
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