How to re-index all resources in GREG 4.0.0

If you need to re-index all resources in greg 4.0.0, here I have explain how you can do that. 

This can be easily done by editing registry.xml located at CARBON_HOME/repository/conf folder. In registry.xml go to the indexingConfiguration section and then change the resource name of lastAccessTimeLocation to some other value.

Default value:

<lastAccessTimeLocation>/_system/local/repository/components/org.wso2.carbon.registry/indexing/lastaccesstime</lastAccessTimeLocation>

New Value (after changing the resource name):

<lastAccessTimeLocation>/_system/local/repository/components/org.wso2.carbon.registry/indexing/newlastaccesstime</lastAccessTimeLocation>

Now restart the server, then greg will re-index all resources from scratch.