Yes, exactly. And I changed DiskStoreCommandsDUnitTest to be Serializable so it
serializes when the lambdas are executed. Otherwise an exception like this is
thrown:
```
org.apache.geode.test.dunit.RMIException: While invoking
org.apache.geode.management.internal.cli.commands.DiskStoreCommandsDUnitTest$$Lambda$53/48305285.run
in VM 1 running on Host localhost with 4 VMs
at org.apache.geode.test.dunit.VM.execute(VM.java:537)
at org.apache.geode.test.dunit.VM.invoke(VM.java:425)
at org.apache.geode.test.dunit.VM.invoke(VM.java:401)
at org.apache.geode.test.dunit.VM.invoke(VM.java:360)
at
org.apache.geode.test.junit.rules.VMProvider.invoke(VMProvider.java:85)
at
org.apache.geode.management.internal.cli.commands.DiskStoreCommandsDUnitTest.validateDiskStoreDiskDirectoryPath(DiskStoreCommandsDUnitTest.java:488)
Caused by: java.rmi.MarshalException: error marshalling arguments; nested
exception is:
java.io.NotSerializableException:
org.apache.geode.management.internal.cli.commands.DiskStoreCommandsDUnitTest
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:158)
at
java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:227)
at
java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:179)
at com.sun.proxy.$Proxy32.executeMethodOnObject(Unknown Source)
at org.apache.geode.test.dunit.VM.execute(VM.java:534)
```
[ Full content available at: https://github.com/apache/geode/pull/3027 ]
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