Unable to use JSON required for Android client

### Jenkins and plugins versions report

Jenkins 2.514
Java 21
Docker Plugin 1274.vc0203fdf2e74

### What Operating System are you using (both controller, and any agents involved in the problem)?

Ubuntu in your docker container

### Reproduction steps

First seen on Devops ToolBox application on android, then I reproduced it using curl.
`curl -u admin http://host:port/job/TCK%20Externals%20deploy/api/json`

### Expected Results

JSON response.

### Actual Results

Html containing just a general error message (the client app was unable to parse it)
```
Oops!
A problem occurred while processing the request
Logging ID=f058ccc2-abdd-4be3-a247-cc181a15526b
```

And this stacktrace on the server:
```
2025-06-16 09:27:25.039+0000 [id=45] WARNING o.e.j.e.n.ContextHandler$APIContext#log: Error while serving http://192.168.13.78:8500/job/TCK%20Externals%20deploy/api/json
org.kohsuke.stapler.export.NotExportableException: class com.nirima.jenkins.plugins.docker.DockerTemplate doesn't have @ExportedBean
at org.kohsuke.stapler.export.Property.writeValue(Property.java:307)
at org.kohsuke.stapler.export.Property.writeValue(Property.java:176)
at org.kohsuke.stapler.export.Property.writeTo(Property.java:160)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:239)
at org.kohsuke.stapler.export.Property.writeValue(Property.java:311)
at org.kohsuke.stapler.export.Property.writeBuffered(Property.java:182)
at org.kohsuke.stapler.export.Property.writeValue(Property.java:243)
at org.kohsuke.stapler.export.Property.writeValue(Property.java:176)
at org.kohsuke.stapler.export.Property.writeTo(Property.java:160)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:239)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:235)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:235)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:235)
at org.kohsuke.stapler.export.Model.writeTo(Model.java:210)
at org.kohsuke.stapler.ResponseImpl.writeOne(ResponseImpl.java:350)
at org.kohsuke.stapler.ResponseImpl.serveExposedBean(ResponseImpl.java:339)
at org.kohsuke.stapler.ResponseImpl.serveExposedBean(ResponseImpl.java:290)
at hudson.model.Api.doJsonImpl(Api.java:259)
at hudson.model.Api.doJson(Api.java:239)
at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(Unknown Source)
at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:484)
Caused: java.lang.reflect.InvocationTargetException
at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:488)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:497)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:218)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:140)
at org.kohsuke.stapler.MetaClass$12.doDispatch(MetaClass.java:686)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:937)
at org.kohsuke.stapler.MetaClass$2.doDispatch(MetaClass.java:244)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:937)
at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:369)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:937)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:721)
at org.kohsuke.stapler.Stapler.service(Stapler.java:253)
at Jenkins Main ClassLoader//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:587)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHolder.handle(ServletHolder.java:765)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1668)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:204)
at PluginClassLoader for metrics//jenkins.metrics.impl.MetricsFilter.doFilter(MetricsFilter.java:125)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
at jenkins.util.HttpServletFilter$1.doFilter(HttpServletFilter.java:77)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:207)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at jenkins.ErrorAttributeFilter.doFilter(ErrorAttributeFilter.java:29)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:160)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:94)
at jenkins.security.AcegiSecurityExceptionFilter.doFilter(AcegiSecurityExceptionFilter.java:52)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:54)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:125)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:114)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:105)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:235)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:229)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at jenkins.security.BasicHeaderProcessor.success(BasicHeaderProcessor.java:148)
at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:95)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:117)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:63)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at hudson.security.ChainedServletFilter2.doFilter(ChainedServletFilter2.java:111)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:173)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at org.kohsuke.stapler.UncaughtExceptionFilter.doFilter(UncaughtExceptionFilter.java:26)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:86)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:31)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:38)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler.doHandle(ServletHandler.java:526)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.handle(ScopedHandler.java:127)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.security.SecurityHandler.handle(SecurityHandler.java:574)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HandlerWrapper.handle(HandlerWrapper.java:124)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextHandle(ScopedHandler.java:197)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.SessionHandler.doHandle(SessionHandler.java:612)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextHandle(ScopedHandler.java:195)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.doHandle(ContextHandler.java:1045)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:164)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler.doScope(ServletHandler.java:483)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:162)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.SessionHandler.doScope(SessionHandler.java:589)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:162)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.doScope(ContextHandler.java:966)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.handle(ScopedHandler.java:125)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.handle(ContextHandler.java:1719)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1565)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel.dispatch(HttpChannel.java:724)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel.handle(HttpChannel.java:512)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler$CoreContextHandler$CoreToNestedHandler.handle(ContextHandler.java:3029)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1071)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:611)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.Server.handle(Server.java:182)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:678)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:416)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:322)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:480)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:443)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:293)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.produce(AdaptiveExecutionStrategy.java:195)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:981)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1211)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1166)
at java.base/java.lang.Thread.run(Unknown Source)
2025-06-16 09:27:25.041+0000 [id=45] WARNING h.i.i.InstallUncaughtExceptionHandler#handleException: Caught unhandled exception with ID f058ccc2-abdd-4be3-a247-cc181a15526b
org.kohsuke.stapler.export.NotExportableException: class com.nirima.jenkins.plugins.docker.DockerTemplate doesn't have @ExportedBean
at org.kohsuke.stapler.export.Property.writeValue(Property.java:307)
at org.kohsuke.stapler.export.Property.writeValue(Property.java:176)
at org.kohsuke.stapler.export.Property.writeTo(Property.java:160)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:239)
at org.kohsuke.stapler.export.Property.writeValue(Property.java:311)
at org.kohsuke.stapler.export.Property.writeBuffered(Property.java:182)
at org.kohsuke.stapler.export.Property.writeValue(Property.java:243)
at org.kohsuke.stapler.export.Property.writeValue(Property.java:176)
at org.kohsuke.stapler.export.Property.writeTo(Property.java:160)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:239)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:235)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:235)
at org.kohsuke.stapler.export.Model.writeNestedObjectTo(Model.java:235)
at org.kohsuke.stapler.export.Model.writeTo(Model.java:210)
at org.kohsuke.stapler.ResponseImpl.writeOne(ResponseImpl.java:350)
at org.kohsuke.stapler.ResponseImpl.serveExposedBean(ResponseImpl.java:339)
at org.kohsuke.stapler.ResponseImpl.serveExposedBean(ResponseImpl.java:290)
at hudson.model.Api.doJsonImpl(Api.java:259)
at hudson.model.Api.doJson(Api.java:239)
at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(Unknown Source)
at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:484)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:497)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:218)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:140)
at org.kohsuke.stapler.MetaClass$12.doDispatch(MetaClass.java:686)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
Caused: jakarta.servlet.ServletException
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:851)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:937)
at org.kohsuke.stapler.MetaClass$2.doDispatch(MetaClass.java:244)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:937)
at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:369)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:61)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:800)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:937)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:721)
at org.kohsuke.stapler.Stapler.service(Stapler.java:253)
at Jenkins Main ClassLoader//jakarta.servlet.http.HttpServlet.service(HttpServlet.java:587)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHolder.handle(ServletHolder.java:765)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1668)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:204)
at PluginClassLoader for metrics//jenkins.metrics.impl.MetricsFilter.doFilter(MetricsFilter.java:125)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
at jenkins.util.HttpServletFilter$1.doFilter(HttpServletFilter.java:77)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:201)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:207)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at jenkins.ErrorAttributeFilter.doFilter(ErrorAttributeFilter.java:29)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:160)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:94)
at jenkins.security.AcegiSecurityExceptionFilter.doFilter(AcegiSecurityExceptionFilter.java:52)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:54)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:125)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:114)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:105)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:235)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:229)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at jenkins.security.BasicHeaderProcessor.success(BasicHeaderProcessor.java:148)
at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:95)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:117)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:63)
at hudson.security.ChainedServletFilter2$1.doFilter(ChainedServletFilter2.java:99)
at hudson.security.ChainedServletFilter2.doFilter(ChainedServletFilter2.java:111)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:173)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at org.kohsuke.stapler.UncaughtExceptionFilter.doFilter(UncaughtExceptionFilter.java:26)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:86)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:31)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:38)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1638)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler.doHandle(ServletHandler.java:526)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.handle(ScopedHandler.java:127)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.security.SecurityHandler.handle(SecurityHandler.java:574)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HandlerWrapper.handle(HandlerWrapper.java:124)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextHandle(ScopedHandler.java:197)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.SessionHandler.doHandle(SessionHandler.java:612)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextHandle(ScopedHandler.java:195)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.doHandle(ContextHandler.java:1045)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:164)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.servlet.ServletHandler.doScope(ServletHandler.java:483)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:162)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.SessionHandler.doScope(SessionHandler.java:589)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.nextScope(ScopedHandler.java:162)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.doScope(ContextHandler.java:966)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ScopedHandler.handle(ScopedHandler.java:125)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler.handle(ContextHandler.java:1719)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1565)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel.dispatch(HttpChannel.java:724)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.HttpChannel.handle(HttpChannel.java:512)
at Jenkins Main ClassLoader//org.eclipse.jetty.ee9.nested.ContextHandler$CoreContextHandler$CoreToNestedHandler.handle(ContextHandler.java:3029)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1071)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:611)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.Server.handle(Server.java:182)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:678)
at Jenkins Main ClassLoader//org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:416)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:322)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:99)
at Jenkins Main ClassLoader//org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:480)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:443)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:293)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.produce(AdaptiveExecutionStrategy.java:195)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:981)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1211)
at Jenkins Main ClassLoader//org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1166)
at java.base/java.lang.Thread.run(Unknown Source)
```
which was followed yet by another one about uncaught exception causing ServletException which is probably not interesting.

### Anything else?

_No response_

### Are you interested in contributing a fix?

_No response_

Start with the reported /job/TCK%20Externals%20deploy/api/json curl reproduction and the stack trace showing DockerTemplate failing export because it lacks @ExportedBean. Trace DockerTemplate through the plugin's API serialization path and verify completion by rerunning the request and confirming it returns valid JSON rather than the HTML error.

Written by the indexing model from the issue text.