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My Maven-managed Java 8/11 web app refuses to start in Tomcat 9. The code compiles cleanly, dependencies resolve, yet as soon as I hit catalina run the server aborts during start-up. I need a fresh pair of eyes to identify and fix whatever configuration detail is blocking the boot sequence. What you’ll be diving into: • Multi-module Maven project (Java 8 baseline, also builds under 11) • Standard war packaging, no Spring Boot embedded server • Tomcat 9 installed outside the project, launched via startup scripts on macOS and a staging Linux box Scope of work 1. Analyse startup logs and pinpoint the failing component or mis-configured resource ([login to view URL], [login to view URL], [login to view URL], or Maven plugin settings). 2. Apply the fix or guide me to adjust the configuration so the application deploys and Tomcat reaches “Server startup in … ms”. 3. Document the changes clearly so I can replicate them on both environments. Acceptance The job is done once the war deploys automatically through mvn clean package and Tomcat starts without errors. If you’ve wrestled with Tomcat 9 and Maven overlays before, this should be quick; I just need the blocker removed so development can continue.
Project ID: 40692647
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A multi-module Maven WAR that compiles cleanly but aborts during Tomcat 9 boot is almost always one of two things: a servlet-api or jsp-api dependency missing <scope>provided</scope>, so a second copy of the container classes ships inside WEB-INF/lib and collides with Tomcat's own, or classes compiled for Java 11 landing on a Tomcat running under Java 8, which surfaces as UnsupportedClassVersionError. Send me [login to view URL] from a failed start, the output of mvn dependency:tree, and java -version from the JVM Tomcat actually runs on. I can usually name the cause from the first stack trace. You get the config change plus written steps for both your macOS box and the Linux staging box, so you can reproduce it in either environment. If it turns out to be something deeper than configuration, I will tell you that plainly rather than guess. Can start today.
₹7,500 INR in 2 days
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34 freelancers are bidding on average ₹7,003 INR for this job

With nearly two decades of professional experience, I am well-positioned to resolve your Tomcat 9 startup issue and get your development back on track. Despite my background in Artificial Intelligence and Machine Learning, my expertise extends far beyond that. Over the years, I've honed my skills in web development, backend programming, cloud deployment and much more. This collective knowledge will be invaluable as I analyze your startup logs, identify the problem area, and suggest a solution. Working with Tomcat 9 and Maven overlays is nothing new to me. In my previous roles at multinational software companies and as the CTO of an AI startup, I designed and built full-stack SaaS applications from scratch, which includes resolving a significant number of startup issues. Besides troubleshooting technical problems effectively, I have a broad-based understanding that allows me to document solutions clearly for others to replicate easily. To sum it up, alongside holding a Bachelor's degree in Computer Science and a PhD in AI, I bring vast experience encompassing different sectors of technology to bear on this task. My strong problem-solving skills paired with deep expertise in technological matters makes me an ideal candidate to resolve your Tomcat 9 startup issue promptly and competently. Let's get your project running smoothly again!
₹1,500 INR in 7 days
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Already where on this issue the same issue is faced on oracle weblogic server . After taking a look i think we can solve it
₹7,000 INR in 7 days
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This is not big issue, I can resolve this asap. Give me a chance to try. I faced such type of issue in past experience
₹6,000 INR in 2 days
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Hi I have the experience dealing with these issues. I can look through your project and help resolve this . It would need a review of logs and then look through the config files and also your web.xml. If you can share the code access and whatever is needed I can get this fixed for you. Thanks, b
₹9,000 INR in 1 day
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Hi, I have worked on Java web applications and understand the kind of Tomcat startup issue you are facing. I can analyze the startup logs, identify the configuration or deployment problem, and fix it so your Maven-managed application starts successfully on Tomcat 9. I will check the relevant configuration files, Maven settings, and deployment process, then clearly document the changes so you can replicate them on both macOS and Linux. I am confident I can handle this task and get your application running properly. Thank you.
₹5,500 INR in 7 days
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INTRO Recently helped a similar business solve the challenge of Tomcat startup failures, turning a frustrating process into a smoother and more effective solution that supported their development goals. I can help you create a practical, professional solution built around what you actually need to achieve, not simply complete the project. MIDDLE I noticed you specifically mentioned analyzing startup logs and pinpointing the failing component. That is important because the right approach here is not just about fixing the startup issue; it is about creating a clean, user-friendly, seamless experience that ensures your application deploys correctly. I bring experience in troubleshooting Tomcat and Maven projects, and we have 75+ 5-star reviews on similar projects and rank in the top 1% among 75 million users! OUTRO If you message me, I can share how I would approach this and where I see the biggest opportunity to solve the challenge effectively. Regards, VutomiM1
₹6,250 INR in 7 days
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Your app builds successfully, so I would start with the first Tomcat startup exception and the deployed WAR/configuration rather than changing application code blindly. I work on commercial Java systems, including legacy-code stabilization, integrations and production fixes. My Freelancer portfolio includes enterprise Java work at Kaufland and EPAM, and legacy stabilization at Nexo. For this task I will: 1. Trace the failing startup component using the complete catalina log, effective Maven configuration and WAR contents. 2. Check Java 8/11 compatibility, dependency/classloader conflicts, context resources and deployment configuration; apply a focused fix. 3. Verify a clean Maven package and successful Tomcat 9 deployment, then document the exact changes and repeatable macOS/Linux steps. The fixed price covers the described startup/deployment blocker and handover, with one completion milestone. Delivery is within 2 days after receiving the project, logs and necessary environment access. Any unrelated feature work would be agreed separately. Please share the first exception and its Caused by chain, plus whether both environments fail identically. I can start immediately. Nik
₹12,000 INR in 2 days
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I am well versed in tomcat and java and the older versions especially and can do this quickly. I can go as far back at tomcat 6 and java 7
₹7,000 INR in 2 days
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I would trace the first causal startup exception, then check the effective POM/overlays, packaged WEB-INF libraries, deployment path and Tomcat context/resources against the actual Java runtime. A startup banner alone is not proof that the WAR deployed. INR 7,500 covers one startup blocker for one WAR on your existing macOS and staging Linux setup: a minimal fix or configuration guidance, change log, rollback steps and repeatable checks. It excludes upgrades, new features, CI/CD rebuilds and production administration. Multiple independent faults or unavailable dependencies require re-scoping before acceptance. Before award, please provide a secret-redacted log (including the first Caused by), relevant POM/config excerpts and exact versions, after we agree permitted data handling. Is mvn clean package already wired to deploy, or are you asking to add that step? Packaging alone does not normally deploy to Tomcat. The 2-day period starts after complete materials, reproducible conditions, scope/test criteria and a funded milestone are confirmed. Acceptance: the agreed build/deploy command succeeds, Tomcat has no application deployment errors, and an agreed endpoint responds in both environments. You can execute the checks and return results; changes/restarts require your approval. I agree tool use and data handling with you before processing non-public material. No credentials needed. Free pre-review is limited to confirming scope and feasibility.
₹7,500 INR in 2 days
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