Weblogic Server System Administration – Top Ten Fundamental Concepts

1. Weblogic Server System Administration – Top Ten Fundamental Concepts Shyam Kumar, AST Corporation Abhay Kumar, AST Corporation

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3. Weblogic Server – Introduction • #1 in worldwide Application Server Software • The Foundation for Oracle Applications and Middleware Technologies Platform • The Foundation for Cloud Applications and Application Infrastructure Consolidation • Supported features such as • Java EE Standards • Scalability/Clustering • Monitoring & Management • Enterprise Security • Enterprise Messaging • Linear Scalability • Coherence etc… • Latest Version 12.1.2

4. Quick Poll? • How many of you are using J2EE application servers such as JBOSS, Oracle iAS, WebSpehere? • How many of you have been using WebLogicServer? • How many of you are planning to use WebLogicServer?

5. Weblogic System Administration –Top 10 Fundamentals Concepts • These are the concepts for Weblogic Server Administration based on our experience in implementing and supporting Weblogic Server platform • These are generic concepts that would apply in any Oracle Middleware/Applications Implementations • These are the Tips and Tricks

6. #10 – Administration Console Elements • Change Center – Lock to make any Change in Weblogic Server • Howdo I – The Panel includes the context sensitive link to Online Help • Domain Structure – Admin Console Pages Tree Structure • System Status – Reports the Health of system • Tool Bar – Appears on the top of Console.

8. #9 –Weblogic Domains - Fundamentals!! • Weblogic Server administration domain is a logically related group of Weblogic Server resources. • Domains include a special Weblogic Server instance called the Administration Server, which is the central point from which you configure and manage all resources in the domain. • Contents of a Domain – • Administration Server • Managed Servers • Resource Services

9. #9 – Weblogic Domain Architecture!! • Depending on your particular business needs and system administration practices, you might decide to organize your domains based on criteria such as: • Logical divisions of applications • Physical location • Size

11. #8 – Resource Management • Mbean Mgmt/SNMP • JDBC - Connection pool waiters • JDBC - Active Connections Current Count • JVM - Heap Size • JVM - Garbage Collection • JMS – ConnectionsCurrentCount • JMS – MessagesCurrentCount • Threads – PendingRequestCurrentCount • Threads - QueueLength • Monitoring file system space, CPU and Memory

12. #8 – Resource ManagementJDBC Monitoring

13. #8 – Resource ManagementJVM Monitoring

14. #8 – Resource ManagementJMS Monitoring

15. #8 – Resource ManagementThread Monitoring

16. #7 – Installation of JVM, WLS, etc. Use standard paths between environments • Folder Case Sensitivity - DO NOT use Upper and Lower Case • Be consistent between the paths • Use Environment variables consistently – JAVA_HOME, DOMAIN_HOME, etc. • Check for port conflicts before installing and configuring domain • Use JRockitas JVM and tune your JVM as per you Application requirements

17. #6 – Thread Dumps for Troubleshoot& Debug WLS Why Take Thread Dumps? • To understand what is actively executed in the system when under load • When system is sluggish or slow or hangs • Java Virtual Process running but Server or App itself not responding • Pages take forever to load • Response time increases • Application and or Server behavior erratic • Just to observe hot spots (frequently executed code) under load • For Performance tuning & for Dependency analysis • To capture snapshot of running state in server

18. #6 – Thread Dumps for Troubleshoot& Debug WLS • Methods to obtain thread dumps for analysis: • Use WLS Admin Console - Login to AdminConsole—>Server —> Monitoring —> Threads • WLST – create .py script • Weblogic.admin(WLS 8.1 and under) java Weblogic.Admin-url t3://localhost:7001 -username Weblogic -password Weblogic1 THREAD_DUMP • Jrockit JVM jrcmd PID print_threads • Oracle/Sun Java JVM kill -3 PID • Windows – control + break in wls startup cmd script – startWeblogic.cmd, startmanagedWeblogic.cmd • Process Explorer

19. #6 – Thread Dumps for Troubleshoot& Debug WLS • Always take 4 or 5 thread dumps within a 20-25 sec period • Locking States

20. #6 – Thread Dumps from Weblogic Console

21. #5 – Log File Management • Consistent log locations across environments • Shared file system/folder • Leverage log rotation properly and efficiently • Tools to view logs – WLS Admin Console , EM Console, file system access and 3rd party tools (sawmill for example)

22. #5 – Log File Settings –WLS Console

23. #5 – Log File Settings –Logging.xml

24. #5 – Log File Settings – EM Console Changes made below are reflected in logging.xml

25. #4 – Back-Up/Restore Server Files • Perform a full offline backup shutdown all processes- WLS- Node Managers- Listeners- EM and emAgent- OHS- WebCache • Perform file system backups using OS tools such as tar: tar -zcvpf backup1.tar ... • Test backup by performing recovery on another computer • Configure automatic backup of WLS configuration it will create config-booted.xml and config-original.xml

26. #3 – Temporary Files andCache Management • Weblogic creates the temporary files in various “temp” folders – “<XYZ>/bea/user_projects/domains/<yourdomain</servers/<yourserver>/tmp” • These Cache would often create issues so it would be recommended to delete all files/folders from “tmp” folders and “Restart” the server.

27. #2 – Weblogic Diagnostic Framework (WLDF) – Watch & Notification • Weblogic Diagnostics Framework (WLDF) consists of a number of components that work together to collect, archive, and access diagnostic information about a WLS Server instance & the applications it hosts such as • Watches and Notifications - The Watch and Notification component of the Weblogic Diagnostics Framework (WLDF) provides the means for monitoring server and application states and then sending notifications based on criteria set in the watches

28. #2 – Weblogic Diagnostic Framework (WLDF) – Watch & Notification • A Watch identifies a situation that you want to trap for monitoring or diagnostic purposes & can be configured to analyze log records, data and events. A watch is specified as a watch rule, which includes: • A watch rule expression • An alarm setting • One or more notification handlers • A notification is an action that is taken when a watch rule expression evaluates to true. WLDF supports the following types of notifications: • Java Management Extensions (JMX) • Java Message Service (JMS) • Simple Mail Transfer Protocol (SMTP), for example, e-mail • Simple Network Management Protocol (SNMP) • Diagnostic Images

29. #2 – Weblogic Diagnostic Framework (WLDF) – Dashboard • Monitoring Dashboard provides views and tools for graphically presenting diagnostic data about servers & applications

30. #1 – Managing Servers using Grid Control Weblogic Server Management Pack (Grid) support features includes • Manage multiple farms and Weblogic Domains centrally • Monitor middleware availability and performance out-of-box; track such data historically, and receive notifications of potential problems • Obtain real-time, in-depth JVM diagnostics without instrumentation overhead • Trace transactions across containers

31. Weblogic Reference Documents • http://docs.oracle.com/cd/E23943_01/wls.htm • http://docs.oracle.com/middleware/1212/wls/NOTES/index.html • http://www.oracle.com/technetwork/middleware/weblogic/documentation/index.html

32. QUESTIONS/COMMENTS

33. THANK YOU Shyam Kumar – skumar@astcorporation.com Abhay Kumar – akumar@astcorporation.com