Muitilile error during generation openapi client from swagger

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#6,455 opened on May 16, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 42/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Quiet
Tech stack: java, openapi
Domain: api

Research direction

Unpack test-github-api.zip, enter the test-github-api directory, and run mvn clean install to reproduce the generated-client compilation errors. Inspect the generated RepositoryCreatedAt.java, RepositoryPushedAt.java, JSON.java, and budget model files, along with the OpenAPI schema that produced them. Done means the reported generated Java sources compile without the missing methods and ContentDirectory class errors.

Written by the indexing model from the issue text.

Description

feature

Hi
I am generating client using openapi toolkit base on your swagger schema. I and during compilation getting multiple errors

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.11.0:compile (default-compile) on project test-github-api: Compilation failure: Compilation failure:
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/model/RepositoryCreatedAt.java:[118,39] cannot find symbol
[ERROR] symbol: method validateJsonElement(com.google.gson.JsonElement)
[ERROR] location: class java.time.OffsetDateTime
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/model/RepositoryCreatedAt.java:[242,27] cannot find symbol
[ERROR] symbol: method validateJsonElement(com.google.gson.JsonElement)
[ERROR] location: class java.time.OffsetDateTime
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/model/RepositoryPushedAt.java:[118,39] cannot find symbol
[ERROR] symbol: method validateJsonElement(com.google.gson.JsonElement)
[ERROR] location: class java.time.OffsetDateTime
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/model/RepositoryPushedAt.java:[247,27] cannot find symbol
[ERROR] symbol: method validateJsonElement(com.google.gson.JsonElement)
[ERROR] location: class java.time.OffsetDateTime
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/JSON.java:[79,94] cannot find symbol
[ERROR] symbol: class ContentDirectory
[ERROR] location: package api.github.com.generated.model
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/model/BillingUpdateBudgetOrg200ResponseBudget.java:[461,15] cannot find symbol
[ERROR] symbol: method validateJsonElement(com.google.gson.JsonElement)
[ERROR] location: class java.lang.String
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/model/Budget.java:[397,13] cannot find symbol
[ERROR] symbol: method validateJsonElement(com.google.gson.JsonElement)
[ERROR] location: class java.lang.String
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/model/GetBudget.java:[464,13] cannot find symbol
[ERROR] symbol: method validateJsonElement(com.google.gson.JsonElement)
[ERROR] location: class java.lang.String
[ERROR] /Users/arseniy/MyPrj/git/test-github-api/target/generated-sources/openapi/src/gen/java/main/api/github/com/generated/model/BillingUpdateBudgetOrgRequest.java:[432,15] cannot find symbol
[ERROR] symbol: method validateJsonElement(com.google.gson.JsonElement)
[ERROR] location: class java.lang.String
[ERROR] -> [Help 1]

How to reproduce:

open zip file test-github-api.zip
cd test-github-api
mvn clean install

Thanks
Arseniy Isakov

test-github-api.zip

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