Oracle WebLogic Server 14c: Troubleshooting Workshop

Course Introduction

• Objectives
• Target Audience
• Course Schedule
• Course Practices
• For More Information
• Related Training

Troubleshooting: Overview

• Objectives
• Troubleshooting
• 1. Define the Problem
• 2. Gather Detailed Information: Interview Questions
• 2. Gather Detailed Information: Collect Data
• 3. Consider Probable Causes
• 4. Choose a Likely Cause and Devise a Plan: Nonreproducible Problem
• 4. Choose a Likely Cause and Devise a Plan: Reproducible Problem
• 5. Implement the Plan: Nonreproducible Problem
• 5. Implement the Plan: Reproducible Problem
• 6. Observe the Results
• 7. Repeat If the Problem Is Unsolved
• 8. Document the Solution
• Troubleshooting Tools
• Giving Information to Oracle Support: RDA
• Summary
• Practice 2-1: Accessing and Setting Up the Practice Environment
• Practice 2-2: <OPTIONAL> Running RDA

WebLogic Server Diagnostic Framework

• Objectives
• WebLogic Server Diagnostic Framework (WLDF)
• WLDF Architecture
• WebLogic Server Logging: Review
• Subsystem Debugging: Review
• WLDF Configuration: Overview
• Diagnostic Images
• Diagnostic Archives
• Diagnostic Modules
• Harvester Architecture
• Metric Collector Definitions
• Policies and Actions
• Policy Alarms
• Built-in Diagnostic System Modules
• Creating Diagnostic System Modules
• Controlling Diagnostic System Modules
• Monitoring Dashboard: Review
• Quiz
• Summary
• Practice 3-1: Harvesting Diagnostic Metrics
• Practice 3-2: Monitoring Diagnostic Metrics

Diagnostic Instrumentation

• Objectives
• Instrumentation Scenarios
• Instrumentation Architecture
• Instrumentation Architecture Diagram
• Types of Diagnostic Monitors
• Available Diagnostic Monitor Actions
• Available Delegating Diagnostic Monitors
• How Diagnostic Code Is Inserted: Aspect-Oriented Programming (AOP)
• Custom Monitors
• When Call and Execute Joinpoints Are Executed: Example
• Instrumentation and Request Performance
• Practice 4-1: Configuring and Monitoring Diagnostic Events
• Diagnostic Context
• Diagnostic Context ID
• Request Dyeing
• Available Dyes
• Event Filtering
• Event Throttling
• Tracing Requests
• Adding Context ID to Log Listings
• Quiz
• Summary
• Practice 4-2: Tracing a Client Request

JVM Troubleshooting

• Objectives
• JVM and JVM Memory
• Garbage Collection
• Sun HotSpot Garbage Collection
• Garbage Collection (GC) Types
• Setting JVM Arguments: Review
• Some Basic HotSpot JVM Arguments
• Out of Memory
• Out-of-Memory Response
• Memory Leak
• JVM Crash
• JVM Error Log
• JVM Tool Varieties
• JVM Crash Actions
• Verbose GC
• JVM Profiling
• Open Source JVM Profiling Tools
• HotSpot JVM Diagnostic Tools: Overview
• Java VisualVM
• Management Communication
• Java Mission Control
• Java Flight Recorder
• Integration of JFR and WLDF
• Admin Console JVM Monitoring: Review
• Quiz
• Summary:
• Practice 5-1: Troubleshooting a JVM

Troubleshooting Servers

• Objectives
• WebLogic Server Startup Issues: Review
• Boot Identity Errors
• WebLogic Server Native Libraries
• Setting the Native Library Path
• Causes of Unresponsive Servers
• WebLogic Server Threads
• Execute Thread State
• Creating and Using a Thread Dump
• Reading a Thread Dump Entry
• Java Deadlock Concepts
• Stuck Thread Detection
• Overload Protection
• Configuring Overload Protection
• Changing Priorities: Work Managers
• Server WLDF Image
• Quiz
• Summary
• Practice 6-1: Investigating Server Problems

Troubleshooting Applications

• Objectives
• WebLogic Server Deployment: Review
• Application Staging
• Deployment Errors
• Shared Library: Review
• Library Errors
• Deployment Debug Flags
• Application Error Handling
• Application Monitoring: Review
• Java Exception-Handling Concepts
• Exception Chains
• Java Stack Trace
• ClassNotFoundException and NoClassDefFoundError
• Class Cast Exception
• Null Pointer Exception
• Stack Overflow Errors
• Too Many Open Files Exceptions
• CLASSPATH: Review
• WebLogic Server Start Script: Review
• Viewing the WebLogic Server CLASSPATH
• Manifest Files and the CLASSPATH
• Domain Libraries
• Java Class Loaders
• Searching Class Loaders
• Searching Class Loaders: Example
• Default Class Loader Hierarchy
• Prefer Web Application Classes
• Prefer Enterprise Application Classes
• Client Library Errors
• Quiz
• Summary
• Practice 7-1: Investigating Application Problems

Troubleshooting JDBC

• Objectives
• JDBC: Review
• Data Sources: Review
• JDBC Runtime Attributes
• JDBC WLDF Image
• JDBC WLDF Diagnostic Monitor: Review
• Data Source Diagnostic Profiling
• Configuring Data Source Diagnostic Profiling
• JDBC Debug Flags
• Common Configuration Errors
• Configuration Error Examples
• Insufficient Connection Errors
• Connection Leaks
• Database Cursor Considerations
• Common Connection Errors
• Statement Timeout
• Data Sources and Database Availability
• Retry Frequency and Login Timeout
• Connection Testing: Review
• Testing Trusted Connections
• Firewall Considerations
• Java Persistence API (JPA): Overview
• JPA Configuration: Overview
• Troubleshooting JPA: Overview
• Quiz
• Summary
• Practice 8-1: Investigating JDBC Problems

Troubleshooting Node Manager

• Objectives
• Node Manager (NM): Review
• NM Architecture Per Machine: Review
• NM Architecture Per Domain: Review
• Java-Based NM Configuration: Review
• Other Node Manager Properties: Review
• Configuring Java Node Manager Logging
• Java Node Manager Availability
• Node Manager Server Start and Health Monitoring Parameters: Review
• Monitoring Node Managers
• Common Configuration Errors
• Comparing the nodemanager.properties Settings to Defaults for the Java NM
• Node Manager Authentication
• Node Manager Trusted Domains
• Enrolling Node Manager with a Domain: Review
• Server Boot Identity
• Configuring Node Manager SSL
• Quiz
• Summary
• Practice 9-1: Investigating Node Manager Problems

Troubleshooting Clusters

• Objectives
• Cluster: Review
• Proxy Plug-in: Review
• Oracle HTTP Server (OHS): Review
• OHS: Review
• OHS Logs
• Starting and Stopping OHS: Review
• OHS Plug-in Configuration: Review
• Some Plug-in Parameters: Review
• Proxy Connection Architecture
• Dynamic Server List: Review
• Connection Parameters
• Common Connectivity Issues
• Proxy SSL Issues
• Proxy Debug Page
• Oracle Diagnostic Logging Directives
• Practice 10-1: Investigating Proxy Problems
• Cluster Communication: Review
• Multicast Architecture: Review
• Unicast Architecture: Review
• Session Management: Review
• Session Persistence: Review
• Session Monitoring Attribute
• Session Instrumentation
• Cluster Debug Flags
• Typical Cluster Heartbeat Trace
• Typical Replication Trace: Primary
• Typical Replication Trace: Secondary
• Common Replication Issues
• Serialization Overview
• Serialization Debug Messages
• Quiz
• Summary
• Practice 10-2: Investigating Cluster Replication Problems

Troubleshooting Security

• Objectives
• WebLogic Server Security Realm: Review
• Security Store: Review
• Authentication Providers: Review
• Available Authentication Providers: Review
• External LDAP Authentication Providers: Review
• Common LDAP Issues: Review (When an External LDAP Is Configured)
• Database Store Cache Synchronization Issues
• Default Authenticator: Embedded LDAP
• Embedded LDAP Backups
• Lost Admin Password in the Embedded LDAP
• Embedded LDAP Synchronization Issues
• Security Realm Debug Flags
• Typical Authentication Trace
• LDAP Trace Log
• Typical Role Mapping Trace
• Typical Authorization Trace
• Authentication Troubleshooting
• Auditing Provider: Review
• Security Audit Events: Review
• Configuration Auditing
• Quiz
• Summary
• Practice 11-1: Troubleshooting Changes by Using Auditing
• Practice 11-2: <OPTIONAL> Recovering the Lost Admin Password

Oracle Cloud

• Agenda
• What is Cloud?
• What is Cloud Computing?
• History – Cloud Evolution
• Components of Cloud Computing
• Characteristics of Cloud
• Cloud Deployment Models
• Cloud Service Models
• Industry Shifting from On-Premises to the Cloud
• Oracle IaaS Overview
• Oracle PaaS Overview
• Oracle SaaS Overview
• Summary

Oracle Java Cloud Service Overview

• Objectives
• Introducing Java Cloud Service Your platform for running business applications
• in the cloud
• Java Cloud Service: Three Options
• Java Cloud Service Main Use Cases
• Java Cloud Service Feature: Provisioning
• Java Cloud Service Feature: Patching
• Java Cloud Service Feature: Backup/Restore
• Java Cloud Service Feature: Scaling
• Oracle Coherence Option: Data Caching & Scaling
• Oracle Coherence Option: Your Cloud Data Grid
• How You Interact with Java Cloud Service
• Speaking of Dev Environments… Developer Cloud Service
• Java Cloud Service On-Premises!
• Summary