Anypoint Studio Define Metadata doesn't work, error: Tooling instance could not be started

SYMPTOM

In Studio 7.3.3. when defining Metadata for any component Studio starts calculating the metadata then after a while the following error is thrown in the logs:
 

org.mule.tooling.client.startup.ToolingNotAvailableException: Tooling instance could not be started, another attempt will be made 
at org.mule.tooling.client.startup.ToolingManager.setup(ToolingManager.java:304) 
at org.mule.tooling.client.startup.ToolingManager.getToolingInstance(ToolingManager.java:136) 
at org.mule.tooling.ui.modules.core.metadata.DataSenseJob.run(DataSenseJob.java:83) 
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56) 
Caused by: org.mule.tooling.runtime.controller.MuleControllerException: Timeout while starting mule instance 
at org.mule.tooling.runtime.controller.MuleController.start(MuleController.java:146) 
at org.mule.tooling.client.startup.ToolingManager.setup(ToolingManager.java:296) 
... 3 more 
Caused by: org.awaitility.core.ConditionTimeoutException: Condition with lambda expression in org.mule.tooling.runtime.controller.MuleController was not fulfilled within 90 seconds. 
at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:104) 
at org.awaitility.core.CallableCondition.await(CallableCondition.java:79) 
at org.awaitility.core.CallableCondition.await(CallableCondition.java:27) 
at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:809) 
at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:785) 
at org.mule.tooling.runtime.controller.MuleController.start(MuleController.java:130) 
... 4 more

The error can also be seen within Anypoint Studio.


 

CAUSE

Antivirus software is installed and running on the same system as Anypoint Studio.  When metadata is being defined the Antivirus software locks the metadata tool threads when it tries to calculate the number of inbounds/outbounds threads. If the thread lock is too long, a timeout occurs and kills the tool process.

SOLUTION

The best solution would be to work with your support team to white list Anypoint Studio in your Antivirus software.  Uninstall the offending antivirus software is also a fix but is not recommend.

Increasing Studio Default startup Timeout