Add config file cause Unable to load error

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, 7.2.X, Master
• Fix Version/s: 7.1.10 DXP FP20, 7.1.10.5 SP5, 7.1.X, 7.2.X, 7.3.X, Master
• Component/s: Application Security > Captcha
• Labels:
  • 7.1-blocker
  • QA-AUTOMATION
  • QA-FP
  • liferay-dxp-71-sp5
  • liferay-fixpack-dxp-20-7110
  • liferay-fixpack-dxp-9-7210
  • pt-upgrade-review
• Branch Version/s:
  7.3.x, 7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Sprint: Iteration 48, Iteration 49
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/95114
• QA Test Name:
  • LocalFile.Captcha#ViewRecaptchaEnabled
• QA Test Score: 4

Step to reproduce:

1. Add com.liferay.captcha.configuration.CaptchaConfiguration.config with maxChallenges="0" to osgi/configs
2. Startup portal
3. Go to Configuration > System Settings > Security Tools > CAPTCHA
4. Set reCAPTCHA Public Key to 6LeIxAcTAAAAAJcZVRqyHh71UMIEGNQ_MXjiZKhI
5. Set reCAPTCHA Private Key to 6LeIxAcTAAAAAGG-vFI1TnRWxMZNFuojJ4WifJWe
6. Click save

Actual result:
Error in console:

19:33:03,497 ERROR [CM Event Dispatcher (Fire ConfigurationEvent: pid=com.liferay.captcha.configuration.CaptchaConfiguration)][SimpleCaptchaImpl:512] Unable to load 
      java.lang.ClassNotFoundException:  cannot be found by com.liferay.captcha.api_2.1.1
      	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:508)
      	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:419)
      	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:411)
      	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:151)
      	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
      	at com.liferay.captcha.simplecaptcha.SimpleCaptchaImpl._loadClass(SimpleCaptchaImpl.java:523)
      	at com.liferay.captcha.simplecaptcha.SimpleCaptchaImpl._getInstance(SimpleCaptchaImpl.java:505)
      	at com.liferay.captcha.simplecaptcha.SimpleCaptchaImpl.initGimpyRenderers(SimpleCaptchaImpl.java:323)
      	at com.liferay.captcha.simplecaptcha.SimpleCaptchaImpl.activate(SimpleCaptchaImpl.java:173)
      	at com.liferay.captcha.simplecaptcha.SimpleCaptchaImpl.activate(SimpleCaptchaImpl.java:185)
      	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.apache.felix.scr.impl.inject.methods.BaseMethod.invokeMethod(BaseMethod.java:228)
      	at org.apache.felix.scr.impl.inject.methods.BaseMethod.access$500(BaseMethod.java:41)
      	at org.apache.felix.scr.impl.inject.methods.BaseMethod$Resolved.invoke(BaseMethod.java:664)
      	at org.apache.felix.scr.impl.inject.methods.BaseMethod.invoke(BaseMethod.java:510)
      	at org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:317)
      	at org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:307)
      	at org.apache.felix.scr.impl.manager.SingleComponentManager.invokeModifiedMethod(SingleComponentManager.java:837)
      	at org.apache.felix.scr.impl.manager.SingleComponentManager.modify(SingleComponentManager.java:792)
      	at org.apache.felix.scr.impl.manager.SingleComponentManager.reconfigure(SingleComponentManager.java:710)
      	at org.apache.felix.scr.impl.manager.SingleComponentManager.reconfigure(SingleComponentManager.java:674)
      	at org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.configurationUpdated(ConfigurableComponentHolder.java:435)
      	at org.apache.felix.scr.impl.manager.RegionConfigurationSupport.configurationEvent(RegionConfigurationSupport.java:317)
      	at org.apache.felix.scr.impl.manager.RegionConfigurationSupport$2.configurationEvent(RegionConfigurationSupport.java:119)
      	at org.apache.felix.cm.impl.ConfigurationManager$FireConfigurationEvent.sendEvent(ConfigurationManager.java:1685)
      	at org.apache.felix.cm.impl.ConfigurationManager$FireConfigurationEvent.run(ConfigurationManager.java:1637)
      	at org.apache.felix.cm.impl.UpdateThread.run0(UpdateThread.java:138)
      	at org.apache.felix.cm.impl.UpdateThread.run(UpdateThread.java:105)
      	at java.lang.Thread.run(Thread.java:745)
          LIFERAY_ERROR: Unable to load 
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