Failed to execute goal 'convertSwagger2markup': Type of parameter 'revokeApplications' must not be blank

[nagendradarla]

Swgger UI is failng when a @RequestParam 'revokeApplications' is added to the REST end point.

My Plugin versions:
<spring.boot.version>2.0.4.RELEASE</spring.boot.version>
<springfox.swagger2.version>2.9.2</springfox.swagger2.version>
<swagger2markup.version>1.3.1</swagger2markup.version>

[ERROR] Failed to execute goal io.github.swagger2markup:swagger2markup-maven-plugin:1.3.1:convertSwagger2markup (default) on project uam-service: Failed to execute goal 'convertSwagger2markup': Type of parameter 'revokeApplications' must not be blank -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal io.github.swagger2markup:swagger2markup-maven-plugin:1.3.1:convertSwagger2markup (default) on project uam-service: Failed to execute goal 'convertSwagger2markup'
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: org.apache.maven.plugin.MojoFailureException: Failed to execute goal 'convertSwagger2markup'
at io.github.swagger2markup.Swagger2MarkupMojo.execute (Swagger2MarkupMojo.java:74)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: java.lang.NullPointerException: Type of parameter 'revokeApplications' must not be blank
at org.apache.commons.lang3.Validate.notBlank (Validate.java:448)
at io.github.swagger2markup.internal.type.BasicType. (BasicType.java:41)
at io.github.swagger2markup.internal.adapter.ParameterAdapter.getType (ParameterAdapter.java:176)
at io.github.swagger2markup.internal.adapter.ParameterAdapter. (ParameterAdapter.java:57)
at io.github.swagger2markup.internal.component.ParameterTableComponent.apply (ParameterTableComponent.java:91)
at io.github.swagger2markup.internal.component.PathOperationComponent.buildParametersSection (PathOperationComponent.java:198)
at io.github.swagger2markup.internal.component.PathOperationComponent.apply (PathOperationComponent.java:100)
at io.github.swagger2markup.internal.document.PathsDocument.applyPathOperationComponent (PathsDocument.java:223)
at io.github.swagger2markup.internal.document.PathsDocument.buildOperation (PathsDocument.java:207)
at io.github.swagger2markup.internal.document.PathsDocument.lambda$null$1 (PathsDocument.java:133)
at java.lang.Iterable.forEach (Iterable.java:75)
at io.github.swagger2markup.internal.document.PathsDocument.lambda$buildsPathsSection$2 (PathsDocument.java:133)
at java.util.TreeMap.forEach (TreeMap.java:1005)
at io.github.swagger2markup.internal.document.PathsDocument.buildsPathsSection (PathsDocument.java:127)
at io.github.swagger2markup.internal.document.PathsDocument.apply (PathsDocument.java:103)
at io.github.swagger2markup.Swagger2MarkupConverter.applyPathsDocument (Swagger2MarkupConverter.java:197)
at io.github.swagger2markup.Swagger2MarkupConverter.toFolder (Swagger2MarkupConverter.java:182)
at io.github.swagger2markup.Swagger2MarkupMojo.execute (Swagger2MarkupMojo.java:69)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
[ERROR]
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]

[nagendradarla]

This issue is coming up when below REST end point is added.

public ResponseEntity<UsersImportResults> importUsersCsv
        (@ApiParam(name="file", value="csv file " +
                "columns = username,email,firstName,lastName,company,organization,department,phone,address")
         @RequestParam("file") MultipartFile file,
         @ApiParam(value = "Revoke Applications")
         @RequestParam(value = "revokeApplications", required = false, defaultValue = "true") Boolean revokeApplications) { }