This topic applies only on the z/OS operating system.

Subtype 7: WebContainer activity record (Version 2)

The purpose of the WebContainer activity SMF record is to record activity within a WebContainer running inside a WebSphere Application Server for z/OS transaction server.

The Web container is deployed within an EJB and runs within the EJB container. The WebContainer acts as a Web server handling HTTP sessions and servlets. The EJB container is not aware of the work the WebContainer does. Instead, the EJB container only records that the EJB has been dispatched. Meanwhile, the WebContainer gathers the detailed information, such as HTTP sessions, servlets, and their respective performance data. A single WebContainer Activity record is created for each activity that is run within a Web container.

WebContainer SMF recording is activated and deactivated along with the activation and deactivation of SMF recording for the J2EE container.

WebContainer activity record (Version 2) schema

This section includes Subtype 7: WebContainer activity record (Version 2).

WebContainer activity section

There is one section per record. The WebContainer activity section contains information about each activity that occurred within one web container.
Offset (decimal) Offset (hexadecimal) Name Length Format Description
0 0 SM120WAA 64 EBCDIC The WebSphere transaction server host name.
64 40 SM120WAB 8 EBCDIC The WebSphere transaction server name.
72 48 SM120WAC 8 EBCDIC The WebSphere transaction server instance name.
80 50 SM120WAD 8 HEX The WLM enclave token.
88 58 SM120WAE 20 HEX The identity of the activity.
108 6C SM120WAF 16 S390STCK The time the activity began in the server.
124 7C SM120WAG 16 S390STCK The time the activity ended.
140 8C SM120CL4 8 EBCDIC Cell
148 94 SM120ND4 8 EBCDIC Node

HttpSessionManager section

There is one section per record. The HttpSessionManager section contains information about all (there may be zero or one) http sessions associated to one single activity.
Offset Offset Name Length Format Description
0 0 SM120WAH 4 binary "created Sessions": Number of http sessions that were created.
4 4 SM120WAI 4 binary "invalidatedSessions": Number of http session that were invalidated.
8 8 SM120WAJ 4 binary "activeSessions": Number of http sessions that were referenced during this activity.
12 C SM120WAK 4 binary "sessionLifeTime": lifetime of the session in milliseconds. If "invalidatedSessions" > 0, this is the average lifetime (in milliseconds) of the invalidated http session.

WebApplication section

There are multiple (0-n) sections per record. The WebApplication section contains information about all WebApplications involved in this activity.

Offset Offset Name Length Format Description
0 0 SM120WAL 256 Unicode The name of the WebApplication.
256 100 SM120WAM 4 binary Number of servlet triplets in this web application section.
The following triplet appears 0-n times, once for each servlet section.
260 104 SM120WAN 4 binary Offset to servlet section from the beginning of this WebApplication section.
264 108 SM120WAO 4 binary Length of servlet section.
268 10C SM120WAP 4 binary Number of servlet sections.

Servlet activity section

There are multiple (0-n) sections per WebApplication section. The Servlet activity section contains information about each servlet associated with WebApplications involved in this activity.
Offset Offset Name Length Format Description
0 0 SM120WAQ 256 Unicode The name of the servlet.
256 100 SM120WAR 4 binary "responseTime": Response time in milliseconds.
260 104 SM120WAS 4 binary "numErrors": The number of errors that were encountered during the servlet execution.
264 108 SM120WAT 4 binary "loaded":

0: The servlet did not have to be loaded as a result of this request.

1: The servlet had to be loaded as the result of this request.

268 10C SM120WAU 16 EBCDIC "loadedSince": Timestamp from System.currentTimeMillis() when the servlet was loaded, in HEX format.
Sample: The data as it appears in the record has the format
e7ef7c577c
, which needs to be converted to a Java long:
996155348860
. The Java long digits can be converted to java.util.Date:
Thu Jul 26 15:49:08 GMT+02:00 2001
284 11C SM120CPU 8 binary Cpu time in microseconds.



Related tasks
Collecting job-related information with the System Management Facility (SMF)
Related reference
Triplets
Header/self-defining section
Product section
Subtype 1: Server activity record
Subtype 3: Server interval record
Subtype 5: J2EE container activity record (Version 2)
Subtype 6: Container interval record (Version 2)
Subtype 8: WebContainer interval record (Version 2)
Related information
MVS System Management Facilities (SMF)
Reference topic    

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