WebSphere Process Server © 2005 IBM Corporation HPTSSeptember 2005 Cross-Component Problem...

WebSphere Process Server

HPTS September 2005 © 2005 IBM Corporation

Cross-Component Problem Determination Based on Logs and Common Base Events

Dr. Friedemann Schwenkreis


© 2003 IBM Corporation2 HPTS September 2005

Outline

What is problem determination?

The interaction of multiple components.

Log files and correlating them

Common Base Events: A canonical means to transport information

The eclipse TPTP project

Questions



What is a Problem?

Invocation is rejected (non-availability problem)

Service is incorrectly performed (failure problem)

Service is correctly performed with some exceptions or additional information (potential problem)

Service is correctly performed

– Quality of service requirements (e.g. timing problem)



Problem Determination

Problem Detection

– Simple in case of failures or non-availability

– Difficult in case of potential problem cases

– Hard when applications do not detect the problem

Localizing the cause

– Relatively easy in a single component because all problem information is in a single log.

– Difficult if the problem is caused by of other components because log information needs to be correlated first.



Component Interaction

AIX

WebSphereApplication

Server

WebSphereProcess Server

DB2 UniversalDatabase

ProcessChoreographer

BPC Log

AppServer

Log

AIXLog

DB2Log



Example: Disk Full

AIX: file system full error

DB2: tablespace full error

WebSphere Application Server: transaction rollback exception

Process Choreographer: audit log exception



Correlating Log File Information

Problem:

– Propriatory log formats

– Non-uniform/component specific log content

Idea:

– Introduce common format (skeleton / basis)

– Agree on common content

– Agree on common usage of values



Common Base Events (CBEs)

Eclipse Hyades project (now: Test and Performance Tools Platform)

Fixed content:

– Name, time, identification, severity

– Source component identification

– Situation

Variable content:

– Extended context elements

– Extended data elements

– Extended properties



Advantages of Common Base Events

Analysis tools from multiple sources/vendors

Enable Cross-component analysis

Extensible: Generate CBEs in your application



Generic Log Adapter

Componentspecific

log file entry

CBEbased

log file entryTransformation Rules

Component specificadapterplugin



Example: DB2 log



Log and Trace Analyzer

AIX

DB2

WAS

BPC

Log & TraceAnalyzer

...

Correlation Rules

FlowVisualization



Questions?

Friedemann Schwenkreis - [email protected]

www.eclipse.org/tptp/home/documents/eclipseCon2005/index.htmlwww.ibm.com/software/awdtools/architect/swarchitect/index.html

WebSphere Process Server © 2005 IBM Corporation HPTSSeptember 2005 Cross-Component Problem...

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