WebLogic Server since 2002 — installation, clustering, tuning, migrations 11g → 14c. Production clusters at T-Mobile, PZU, Wipro and Orange.
From first installation to migration to a newer version. We do what a production engineer does — not a slide-deck consultant.
We move WebLogic from 11g to 12c or 14c — upgrading in place or in parallel, on a fresh install. Always with a rollback plan, tests after the switch and 30 days of monitoring. If your version no longer gets security patches, we plan the migration ahead of time — before an incident forces it.
Deployments in DEV/TEST/PRE/PROD environments. Domain layout, machines, managed servers, clusters, JDBC datasources, SSL keystores, JMS modules.
Managed server clusters with load balancing (round-robin, weight-based, session-based), failover, NodeManager with SSL, multi-DC active-active.
JVM (-Xms/-Xmx, GC G1/ZGC), thread pools, JDBC connection pools, EJB pool sizes, HTTP keep-alive, OS limits. We measure — we don't guess.
JMS modules, queue/topic, distributed destinations, persistence stores, message bridges, store-and-forward. Integrations with SOA Suite and Service Bus.
Authentication providers (LDAP, AD, SAML, OAuth2), SSL/TLS keystores, role-based access, security audit, OWASP scan, Oracle CPU patches.
Oracle Enterprise Manager, stuck thread alerts, heap usage, request count. Integration with Prometheus/Grafana/Splunk for enterprise teams. Custom dashboards.
Body leasing of a WebLogic administrator or full outsourcing of cluster maintenance. Fixed rates, monthly reports, SLA and penalties agreed in the contract.
Describe the problem — an engineer replies within 24 h, not a salesperson.
Write to an engineerActive deployments at clients on 14c, 12c and 11g. Each version has different best practices — we know them firsthand.
New generation: Java SE 17 support, K8s operator, full Jakarta EE alignment. Our deployments at T-Mobile and PZU.
The most common version in Polish enterprise production. Multitenancy, ZDT patching, Resource Groups, Coherence integration.
Still present in older banking and administrative clusters. We support maintenance + migration to 12c/14c with no downtime.
Oracle SOA Suite, Service Bus, HTTP Server, Enterprise Manager, Coherence — the full Oracle middleware stack in one place.
Three answers — a preliminary risk rating and migration target based on Oracle's support policy. The final one comes from a compatibility assessment, not from a promise that nothing in the code will change.
javax.* → jakarta.* changes, JDK updates, descriptors and dependencies. Oracle ships Rewrite WebLogic / OpenRewrite recipes, but the application team still has to be involved.Sources: Oracle Lifetime Support Policy ("Sustaining Support" = no error correction or security patches); Oracle, Fusion Middleware Statement of Direction (13 May 2026); Oracle, End of Premier and Extended Support for Oracle Fusion Middleware 12c (29 Apr 2026); Oracle communication on the 14.1.1 error-correction extension (as of 12 Sep 2026). Confirm the dates against your own support agreement.
A WLS cluster is the centre of the system. We work with the entire surrounding stack — from database to web frontend, on-prem and in the cloud.
Fixed rates, monthly reports, clear responsibility map. You can start with an audit and decide next. Individual quote in 24 h.
One-time — understand the state of your environment before making a decision.
Production support during business hours.
Full on-call duty for business-critical applications.
Regulated environment (KNF, ISO 27001, GDPR) or multi-DC active-active? Let's talk about an Enterprise package — dedicated team, NDA, external audits.
We list only clients who have given consent to be published. Full list of 30+ deployments — under NDA.
Every training is delivered by an engineer with active enterprise client deployments. Not a consultant with a slide deck — an administrator from the WebLogic console. Vouchers, dedicated on-site training.
-Xms/-Xmx, GC algorithm (G1 for most, ZGC for low-latency), heap dump on OOM, JFR. (2) WebLogic — thread pool (work managers, capacity), JDBC pools (initial/max/test on reserve), EJB pools, HTTP keep-alive, session timeout. (3) Application — query optimization (EXPLAIN), N+1, lazy loading, caching strategies. (4) OS/net — ulimit (open files, processes), TCP keepalive, NFS sync mode, storage IOPS. We measure every change before/after (JFR + thread dumps + heap dumps).Five commands, five minutes. Check the state of your environment before calling us — the result will tell you whether you have a real problem or a false alarm.
java weblogic.versioncd $DOMAIN_HOME/bin && ./serverStatus.shjps -l | grep weblogic.Serverjstat -gcutil <PID> 1000 5grep -i "STUCK" $DOMAIN_HOME/servers/*/logs/*.log | tail -20Tell us what you're facing. Your choices in the form build a brief — exactly what the engineer who replies will see.
Your data is safe. It will be used only to handle your request. More info in our privacy policy.
7 questions — reply within 24 business hours, from the owner and engineer with 25 years of experience. Middleware Audit from PLN 4,990 net; scope and quote once the environment is confirmed.
Reply within 24 business hours. Middleware Audit from PLN 4,990 net — scope and quote once the environment is confirmed.
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