Spring Boot Root-Cause DiagnosisJunsoo Kim
Turn an unclear Spring Boot failure into a concrete diagnosis: reproduction result, root-cause evidence, affected path, fix feasibility, and the exact next action.
Starting at $200 guarantees that diagnostic package for one supplied issue within three active diagnostic hours. When the cause is locally reproducible and a narrow safe change fits, the patch and up to two focused tests are included. A separately written fix project is the path when implementation exceeds the diagnosis scope.
PF06 is a self-initiated isolated Spring Boot and Java 21 demonstration. It recreates an input-validation 500, changes the agreed behavior to 400 for invalid input, 409 for duplicates, and 201 for a valid request, and verifies it with five MockMvc tests. It demonstrates my debugging method; it is not a production-client claim.
Send the failing command or request, sanitized logs, and version details so I can confirm the diagnosis scope.
What you receive
• Reproduction result: exact attempt, command or request, environment, and observed behavior
• Root-cause evidence: category, traced failure path, and affected component
• Fix feasibility: safe patch path, dependency or access blocker, and risk
• Exact next action: concrete implementation or verification step
• Narrow source patch and up to two focused tests when safely feasible
What I need from you
1. Repository snapshot or minimal reproducer for a patch, or sufficient sanitized evidence for diagnosis
2. Exact failing request or command plus the build and test command
3. JDK, Spring Boot, Maven or Gradle, database, and relevant library versions
4. Sanitized logs or stack trace plus expected versus actual behavior, with secrets removed
Scope and support
A production emergency, major-version migration, architecture-wide refactor, external-account permission failure, large untested legacy rescue, cloud or infrastructure repair, production database migration, or penetration test requires a separate engagement. A patch also requires a runnable repository or minimal reproducer.
The starting service includes one consolidated revision round. For 14 calendar days after delivery, I correct omissions or defects reproducible with the agreed evidence and environment at no added charge. New symptoms, changed dependencies, or a different endpoint are separate scope.
FAQs
Example work
Junsoo's other services
Starting at$200
Duration5 days
Tags
Java
Spring Boot
Backend Engineer
Software Developer
JUnit
Maven
Service provided by
Junsoo Kim Seoul, South Korea
Spring Boot Root-Cause DiagnosisJunsoo Kim
Starting at$200
Duration5 days
Tags
Java
Spring Boot
Backend Engineer
Software Developer
JUnit
Maven
Turn an unclear Spring Boot failure into a concrete diagnosis: reproduction result, root-cause evidence, affected path, fix feasibility, and the exact next action.
Starting at $200 guarantees that diagnostic package for one supplied issue within three active diagnostic hours. When the cause is locally reproducible and a narrow safe change fits, the patch and up to two focused tests are included. A separately written fix project is the path when implementation exceeds the diagnosis scope.
PF06 is a self-initiated isolated Spring Boot and Java 21 demonstration. It recreates an input-validation 500, changes the agreed behavior to 400 for invalid input, 409 for duplicates, and 201 for a valid request, and verifies it with five MockMvc tests. It demonstrates my debugging method; it is not a production-client claim.
Send the failing command or request, sanitized logs, and version details so I can confirm the diagnosis scope.
What you receive
• Reproduction result: exact attempt, command or request, environment, and observed behavior
• Root-cause evidence: category, traced failure path, and affected component
• Fix feasibility: safe patch path, dependency or access blocker, and risk
• Exact next action: concrete implementation or verification step
• Narrow source patch and up to two focused tests when safely feasible
What I need from you
1. Repository snapshot or minimal reproducer for a patch, or sufficient sanitized evidence for diagnosis
2. Exact failing request or command plus the build and test command
3. JDK, Spring Boot, Maven or Gradle, database, and relevant library versions
4. Sanitized logs or stack trace plus expected versus actual behavior, with secrets removed
Scope and support
A production emergency, major-version migration, architecture-wide refactor, external-account permission failure, large untested legacy rescue, cloud or infrastructure repair, production database migration, or penetration test requires a separate engagement. A patch also requires a runnable repository or minimal reproducer.
The starting service includes one consolidated revision round. For 14 calendar days after delivery, I correct omissions or defects reproducible with the agreed evidence and environment at no added charge. New symptoms, changed dependencies, or a different endpoint are separate scope.
FAQs
Example work
Junsoo's other services
$200