8.6.2 Trace collection points of a Web container when an exception occurs (filter trace)

Organization of this subsection

(1) Trace collection points and PRF trace collection levels
(2) Trace information that can be collected

(1) Trace collection points and PRF trace collection levels

The following table describes the event IDs, trace collection points, and PRF trace collection levels.

Table 8‒12: Details of trace collection points in a Web container when an exception occurs (filter trace)
Event ID	No. in the figure^#	Trace acquisition points	Level
0x8202	3	Immediately before a servlet or JSP is invoked	A/B
0x8202	8	Immediately before a servlet or JSP is invoked	A/B
0x8203	2	Immediately before the filter that is executed before the execution of the servlet or JSP that receives the request is invoked (filter for which the `<dispatcher>` tag of the `<filter-mapping>` tag of `web.xml` is omitted, or for which `REQUEST` is specified in the `<dispatcher>` tag)	B
0x8206	6	Immediately before a servlet or JSP is invoked via RequestDispatcher	B
0x8207	8	Immediately before the static contents are invoked (DefaultServlet)	B
0x8216	7	Immediately before the filter that is executed during transfer to the error page is invoked (filter for which `ERROR` is specified in the `<dispatcher>` tag of the `<filter-mapping>` tag of `web.xml`)	B
0x8236	1	Immediately after a request is acquired, or when the request header analysis is complete	A
0x8302	4, 9	Immediately after completion of the processing of the servlet or JSP	A/B
0x8303	5	Immediately after completion of the processing of the filter that is executed before the execution of the servlet or JSP that receives the request (filter for which `REQUEST` is specified in the `<dispatcher>` tag of the `<filter-mapping>` tag of `web.xml`)	B
0x8306	11	Immediately after completion of the processing of the servlet or JSP via RequestDispatcher	B
0x8307	9	Immediately after completion of the processing of the static contents (DefaultServlet)	B
0x8316	10	Immediately after completion of the processing of the filter executed during transfer to the error page (filter for which `ERROR` is specified in the `<dispatcher>` tag of the `<filter-mapping>` tag of `web.xml`)	B
0x8336	12	Immediately after the completion of request processing	A

Legend:

A: Standard

B: Advanced

A/B: Different information is collected for the Standard and Advanced levels.

#

Corresponds to the numbers in Figure 8-12.

The following figure shows the trace collection points in a Web container when an exception occurs.

Figure 8‒12: Trace collection points in a Web container when an exception occurs

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(2) Trace information that can be collected

The following table describes the trace information that can be collected in a Web container, when the filter that is invoked during Forward or Include is specified.

Table 8‒13: Trace information that can be collected in a Web container when an exception occurs (filter trace)
No. in the figure^#	Event ID	Level	Information that you can acquire
No. in the figure^#	Event ID	Level	Interface name	Operation name	Optional
1	0x8236	A	HTTP method	URI	Value for the request header name specified in the property (none if the header name is not specified)
2	0x8203	B	Class name	Context root name	`Number-of-session-ID-characters`: `session-ID`: `number-of-global-session-ID-characters`: `global-session-ID`
3	0x8202	A	Class name (JSP file name when a JSP is invoked)	--	--
3	0x8202	B	Class name (JSP file name when a JSP is invoked)	Context root name	`Number-of-session-ID-characters`: `session-ID`: `number-of-global-session-ID-characters`: `global-session-ID`
4	0x8302	A	Class name (JSP file name when a JSP is invoked)	--	When normal: `Entrance-time` For an exception: `Entrance-time exception-name`
4	0x8302	B	Class name (JSP file name when a JSP is invoked)	Context root name	When normal: `Entrance-time` `number-of-session-ID-characters`: `session-ID` For an exception: `Entrance-time exception-name`: `number-of-session-ID-characters`: `session-ID`
5	0x8303	B	Class name	Context root name	When normal: `Entrance-time` `number-of-session-ID-characters`: `session-ID` For an exception: `Entrance-time exception-name`: `number-of-session-ID-characters`: `session-ID`
6	0x8206	B	Class name	Dispatch type Context root name	`Number-of-session-ID-characters`: `session-ID`: `number-of-global-session-ID-characters`: `global-session-ID`
7	0x8216	B	Class name	Context root name	`Number-of-session-ID-characters`: `session-ID`: `number-of-global-session-ID-characters`: `global-session-ID`
8	0x8202	A	Class name (JSP file name when a JSP is invoked)	--	--
	0x8202	B	Class name (JSP file name when a JSP is invoked)	Context root name	`Number-of-session-ID-characters`: `session-ID`: `number-of-global-session-ID-characters`: `global-session-ID`
	0x8207	B	--	Context root name	`Number-of-session-ID-characters`: `session-ID`: `number-of-global-session-ID-characters`: `global-session-ID`
9	0x8302	A	Class name (JSP file name when a JSP is invoked)	--	When normal: `Entrance-time` For an exception: `Entrance-time exception-name`
	0x8302	B	Class name (JSP file name when a JSP is invoked)	Context root name	When normal: `Entrance-time` `number-of-session-ID-characters`: `session-ID` For an exception: `Entrance-time exception-name`: `number-of-session-ID-characters`: `session-ID`
	0x8307	B	--	Context root name	When normal: `Entrance-time` `number-of-session-ID-characters`: `session-ID` For an exception: `Entrance-time exception-name`: `number-of-session-ID-characters`: `session-ID`
10	0x8316	B	Class name	Context root name	When normal: `Entrance-time` `number-of-session-ID-characters`: `session-ID` For an exception: `Entrance-time exception-name`: `number-of-session-ID-characters`: `session-ID`
11	0x8306	B	Class name	Dispatch type Context root name	When normal: `Entrance-time` `number-of-session-ID-characters`: `session-ID` For an exception: `Entrance-time exception-name`: `number-of-session-ID-characters`: `session-ID`
12	0x8336	A	HTTP method	URI	`Entrance-time status-code`