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Error while starting mule. Mule application keeps restarting in Studio

公開日: Aug 6, 2025
解決策

SYMPTOM

You are trying to run a mule project and the application builds normally, but startup fails with "Error while starting mule" and continuously restarts. Exception stack trace shows a java.lang.NullPointerException at org.mule.tooling.core.utils.VMUtils.getVMArguments .
Example log shows 
!ENTRY org.mule.tooling.runtime 4 0 2021-10-26 11:51:45.683
!MESSAGE Error while starting mule
!STACK 0
java.lang.NullPointerException
at org.mule.tooling.core.utils.VMUtils.getVMArguments(VMUtils.java:110)
at org.mule.tooling.runtime.launch.MuleRuntimeProcessLaunchDelegate.getVMArguments(MuleRuntimeProcessLaunchDelegate.java:1112)
at org.mule.tooling.runtime.launch.MuleRuntimeProcessLaunchDelegate.doLaunch(MuleRuntimeProcessLaunchDelegate.java:461)
at org.mule.tooling.runtime.launch.MuleRuntimeProcessLaunchDelegate.performLegacyDeployment(MuleRuntimeProcessLaunchDelegate.java:395)
at org.mule.tooling.runtime.launch.MuleRuntimeProcessLaunchDelegate.launch(MuleRuntimeProcessLaunchDelegate.java:287)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:803)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:716)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1021)
at org.eclipse.debug.internal.ui.DebugUIPlugin$2.run(DebugUIPlugin.java:1224)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

CAUSE

Your project or workspace has been corrupted.

SOLUTION

Export the project as a jar file with project sources. Right-click on the project on the 'Package Explorer' view, left hand side --> Select "Export..." --> Select Mule/Anypoint Studio Project to Mule Deployable Archive.
Then switch to a new workspace and reimport it again in that new workspace.
ナレッジ記事番号

001122504

 
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