Oracle WebLogic Server: Troubleshooting Methodologies

Introduction to Diagnostic Patterns Overview of Patterns What is a Pattern Identifying Support Pattern Methodology Why Use Support Patterns Identifying Support Pattern Resources Common Diagnostic Tools JVM Management: Java SE 6.0 Monitoring and Management Architecture Identifying Processes and Threads Obtaining a Thread Dump Using WLS Memory: Define Java Heap Garbage Collection Review Configuring JRockit Heap Server Core Dump Pattern Identifying Server Core Dump Pattern Symptoms and Causes of a Server Core Dump Identifying Why Core File is Not Produced Investigating Causes of Server Core Dump Overview of Investigation Overview of Core File Tools Overview of Standard Investigation Tools Creating Troubleshooting Checklist Generic Server Hang Pattern Symptoms and Causes of a Server Hang Investigation of Server Hang Basic Investigation Steps View the Execute Threads Thread Dump on a Running Server Analysis and Troubleshooting Investigation Results Setting Server Thread Counts Troubleshooting Strategy Identifying High CPU Usage Pattern and Describing Resolution Steps Identifying High CPU Usage Pattern Review: Processes and Threads Investigating High CPU Usage: On Solaris, Linux, and Windows OS Analyzing the Server Instance to Determine What Threads are Causing the Issue Using the Analyzed Information to Identify Areas Where Performance Tuning is Required Analyzing and Diagnosing Out of Memory/Memory Leak Patterns Review of General Memory Concepts: Java Heap, Native Memory, and Memory Leaks Investigating Java Heap Out of Memory Errors Review Garbage Collection and Object References Symptoms, Causes, and Troubleshooting of Out of Memory in Java Heap Investigating Out of Native Memory Conditions Review: Process Size, Virtual vs. Physical Memory Symptoms, Causes, and Troubleshooting of Native Out of Memory Conditions

Generic JDBC Pattern Understanding Generic JDBC Pattern Review: JDBC Database, Datasources, Connection Pool, and Statement Cache Investigating JDBC Problems Server Startup: Failed Pool Creation Causes of Resource Exceptions Overview of Insufficient Connections Troubleshooting WebLogic Server Crashes Troubleshooting WebLogic Server or Application Hangs and Memory Leaks Troubleshooting Too Many Open Files Pattern Symptoms, Causes, and Troubleshooting of Too Many Open Files Problem Identifying a WebLogic System That Has Too Many Files Open Using Available Tools to Determine Which Component Has Too Many Files Open and What the Files Are Describing and Diagnosing Class Exception Patterns Describing Class Cast Exception Pattern Investigating Class Exceptions and Errors Adding Application Code Diagnostics Identifying Different Class Loaders Describing Known WLS Issues Understanding and Troubleshooting Class Casting Issues Understanding and Troubleshooting Basic Class Loader Issues Understanding Symptoms, Causes, and Tools to Troubleshoot Multicast Patterns Reviewing a WebLogic Server Cluster and Clustered Server Communication Describing Multicast Problems and Investigation Configuration Errors and Physical Network Problems Multicast Timeouts Clustering Heartbeat Problems and Multicast Storms Testing and Debugging Multicast Patterns Discussing Some of the Potential Multicast Issues that Can Occur in a WebLogic Server Cluster Understanding the Processes Involved in Identifying and Resolving the Issues General Diagnostics for Proxy Plug-ins Pattern Diagnosing and Troubleshooting Proxy Plug-ins Pattern Gathering Plug-in Diagnostics Switching on Debugging for the WebLogic Server Proxy Knowing Where to Look in the WebLogic Server Console and Proxy Logs for Issues Identifying, Investigating, and Diagnosing HTTP Session Replication Failures Pattern Reviewing HTTP Session Replication Failures Pattern Causes, Symptoms, and Examples of HTTP Session Replication Failure Investigating HTTP Session Replication Failures Gathering Diagnostics: Enable Debug Understanding How the WebLogic Server Proxy Server Works with Respect to HTTP Session Replication and Failover Discussing Various Aspects of HTTP Session Replication Configuration and Operation