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Avoid multiple warnings related to jackson-module-kotlin in Jackson2ObjectMapperBuilder [SPR-16497] #21040

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spring-issuemaster opened this issue Feb 14, 2018 · 1 comment
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@spring-issuemaster spring-issuemaster commented Feb 14, 2018

Rossen Stoyanchev opened SPR-16497 and commented

The following message appears repeatedly:

16:21:15.415 [main] WARN  org.springframework.http.converter.json.Jackson2ObjectMapperBuilder - For Jackson Kotlin classes support please add "com.fasterxml.jackson.module:jackson-module-kotlin" to the classpath

It seems we would be able to do some detection on startup and report only once, at least per Jackson2ObjectMapperBuilder initialization.


Affects: 5.0.3

Issue Links:

  • #20217 Log a warning in Jackson builder when Kotlin is used without jackson-module-kotlin

Referenced from: commits 7baf33f

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@mauhiz mauhiz commented Jan 10, 2020

For people who reach this page wondering how to silence the warn:

  @Bean
  fun configureJackson2() = Jackson2ObjectMapperBuilderCustomizer { it.findModulesViaServiceLoader(true) }
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