Blog

A comprehensive POV on building an internal developer platform — from self-service pipelines and golden-path blueprints to policy-as-code and a three-phase maturity roadmap.

When compliance or self-selection bias rules out A/B testing, adaptive experimentation with instrumental variables offers a smarter, regulation-safe alternative.

Lift and shift gets you to the cloud, but it won't unlock its value. A practical framework for cloud-native modernization, FinOps, and sustainable transformation.

A self-paced workshop covering the full serverless data lake stack on AWS — S3, Kinesis, Glue, SageMaker, Athena, and QuickSight — with code on GitHub.

AWS Lake Formation promises to cut data lake build time from months to days. Here's what it actually does and why it matters for enterprise data teams.

How to use IAM condition keys and EC2 resource tags to restrict stop, start, and terminate actions to the instance owner only.

Tune JRockit JVM for WebLogic workloads: heap sizing, GC mode selection (-XgcPrio), pause targets, compaction ratios, and Thread Local Area (TLA) settings.

WebLogic Server admin interview Q&A covering clusters, session replication, staging modes, thread dumps, multi data sources, and JVM tuning essentials.

Use WLST addTarget and removeTarget methods via the DeploymentMBean interface to programmatically retarget JDBC data sources across WebLogic server instances.

Configure a JMS messaging bridge between two WebLogic domains with step-by-step setup for bridge destinations, QoS levels, and producer/consumer wiring.

Re-enable WebLogic 8.1-style execute queues in WLS 9.x and 10.x using the Use81StyleExecuteQueues flag in config.xml or as a JVM startup argument.

Sub-deployments in WebLogic JMS co-locate connection factories with queues and topics on a specific JMS server, reducing network hops and enabling migration.

Steps to replace a WebLogic Administration Server in a live domain — create a new admin server, promote it, then delete the original via the console.

Use storeUserConfig in WLST to store encrypted credentials in a config file, then connect without plain-text passwords in scripts or automated deployments.

Quick reference mapping DOS commands to their Unix equivalents — cd, cp, rm, ls, mkdir and more — plus essential Unix-only commands for file management and user information.

WLST script to switch a WebLogic server from Java Logging to Log4j by setting Log4jLoggingEnabled on the LogMBean — step-by-step commands from connect to activate.

BEA-000388 force-shutdown caused by OS signals caught by the JVM. Fix with -Xrs to suppress signal handling, or -XX:+ShowMessageBoxOnError to capture a thread dump before shutdown.

BEA-000627 connection pool exhaustion troubleshooting: tune MaxCapacity, match thread pool size to pool size, set InitialCapacity equal to MaxCapacity, and enable TestConnectionsOnReserve.

WebLogic threads stuck in HashMap.put causing high CPU is a known JVM bug triggered by concurrent RMI serialization. Diagnosis via thread dumps and Oracle patch request.

Curated reference to Sun's comprehensive JVM options list, covering HotSpot flags across multiple JVM versions on SPARC/Solaris — useful for tuning and troubleshooting Java applications.

How WebLogic side-by-side (versioned) deployment works: set the version in MANIFEST.MF, deploy v2 alongside v1, and let WebLogic retire the old version once all active sessions drain.

Complete offline WLST script for WebLogic 11gR1 (10.3.1) that creates a domain with an Admin Server, two Managed Servers, a cluster, and deploys a WAR — no server running required.

How to run WLST on WebLogic 8.1, which lacks built-in scripting support — download jython.jar and wlst.jar and add them to your CLASSPATH before invoking java weblogic.WLST.

WLST script that iterates over every server in a WebLogic domain and updates log severity, file count, and broadcast settings in a single edit session.

WLST script to configure WebLogic AdminServer log rotation, file count, severity levels for stdout, domain log broadcast, and the HTTP access log.

A parable about resilience: three objects face the same boiling water and react differently — a reminder that adversity reveals, and sometimes transforms, character.

WLST script to create a WebLogic multi data source with failover algorithm, pooling two existing data sources and targeting the configuration to a server.

WLST script that reads OpenSessionsCurrentCount, OpenSessionsHighCount, and SessionsOpenedTotalCount from WebAppComponentRuntimeMBean for a deployed app.

Complete WLST script to create a JDBC data source in WebLogic — sets JNDI name, driver, connection pool params, and targets it to multiple servers.

WLST's easeSyntax() command lets you drop parentheses from ls, cd, and get in interactive mode — cutting keystrokes when navigating MBeans.

WLST script that triggers a forced JVM garbage collection on a WebLogic server via cmo.runGC() — useful when memory isn't releasing under normal conditions.

Step-by-step guide to registering a WebLogic Managed Server as a Windows service, with proper dependency and startup delay on the Admin Server service.

A ready-to-run batch script that registers a WebLogic Admin Server as a Windows service using installSvc.cmd — no manual steps required.

First post on a new technical blog covering Oracle WebLogic, WLST scripting, and JVM tuning tips for middleware engineers.