The product setup guide is described on the assumption that the environment is a single tenant.
In the "Multi-tenant by a WAR file", it is not necessary to delete a "File directory under the <%RESIN_HOME%/resin-data>".
To uninstall only a certain tenant, basically there is no problem to only execute undeploy.
Moreover, when deploying again with the same name, some jar files might remain, so please comfirm the webapps directory under the Resin installation destination.
However, when redeployment cannot be done normally in updating or applying an patch, it is necessary to perform undeployment and delete under the resin-data directory for all tenants that are not to be redeployed.
Please refer to this for details.
http://www.intra-mart.jp/download/product/iap/setup/iap_setup_guide/texts/appendix/resin_redeploy.html
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iAP/Accel Platform/All Updates
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