Logging in the ICM and Web Dispatcher

Use

To get an overview of the load on the ICM and Web Dispatcher, an access log can be created in which accesses from the Intranet and Internet are logged. You can also log accesses to the Internet for the ICM (if the SAP NetWeaver Application Server acts as the client).

You can use external analysis programs to analyze the log file.

An HTTP subhandler implements logging in the ICM / Web Dispatcher. This subhandler statistically analyzes HTTP requests and records requests.

More information: Processing HTTP Requests

Caution

The log handler uses the log file to serialize itself, which makes it a bottleneck. It is therefore not usually activated.

The logging implementation procedure corresponds to the Apache Web Server mod_log_config module.

Note

For security reasons the following information is hidden (replaced with points) from the logging procedure.

Parts of the URL	`;jsessionid` URI parameters in round brackets if they contain the context ID `?...sap-contextid=...` `;sap-contextid=`
Header fields (case insensitive)	`Authorization` `sap-password` `SAP-R3Auth` (RFC logon via HTTP) `Proxy authorization` `MYSAPSSO2` (inheritance of the identity via HTTP channel)
Cookies (case sensitive)	`sap-contextid` `jsessionid`
Form fields (case insensitive)	`sap-contextid` `sap-password`

Example

An entry could look like:

10.18.200.78 - - [25/May/2004:18:06:57 +0200] "GET /sap(..................)/public/icman/test;jsessionid=...../umu.html?sap-user=saphttp&sap-password=....&test=111 HTTP/1.1" 404 2144

Configuration

You can configure logging in parameters icm/HTTP/logging_<xx> (for incoming requests) and icm/HTTP/logging_client_<xx> (for outgoing requests).

Example

Sample Log Entries for Default Format (CLF)

10.18.103.34 - - [08/Jan/2009:16:53:20 +0100] "GET /sap/bc/bsp/sap/it00/default.htm HTTP/1.0" 200 336

10.18.103.34 - - [08/Jan/2009:17:01:15 +0100] "POST /bc/bsp/sap/it00/transition_parameter.htm HTTP/1.0" 302 0

The following string creates the CLF format: %h %l %u %t "r" %s %b
Sample Log Entry for a Self-Defined Format

The following format

LOGFORMAT=%b %h %H %S %a %l %u %t %T Line=%r %f %U %s %{user-agent}i

gives these kind of entries:

181 10.18.104.64 ls3022.wdf.sap-ag.de 8080 10.18.104.64 - - [11/Apr/2009:14:01:08 +0200] 0 Line=GET /sap/bc/bsp/sap/it00 HTTP/1.1 /bc/bsp/sap/it00 /bc/bsp/sap/it00 500 Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)

Display

You can display the logging data in the ICM Monitor (transaction SMICM) by choosing Start of the navigation path Goto Next navigation step HTTP Plug-In Server Logs End of the navigation path or Client Logs. A list of all logs then appears, and you can display logs and associated information.