This bug is for 5.5.26 which is still missing in the version list of bugzilla. When deploying a webapp via the deploy upload in the manager webapp gui the following exception gets thrown: java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream org.apache.commons.fileupload.DefaultFileItemFactory.createItem(DefaultFileItemFactory.java:103) org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:350) org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:302) org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:166) javax.servlet.http.HttpServlet.service(HttpServlet.java:710) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) This is due to a missing dependency of commons-fileupload. Between TC 5.5.25 and 5.5.26 commons-fileupload has been updated from version 1.0 to 1.2. commons-fileupload unbundled some commons-io classes between 1.0 and 1.1, so we need to bundle commons-io with the manager webapp. Problem can be fixed by including commons-io version 1.4 in the manager webapp.
Fix applied. Expected to be part of a future release 5.5.27.
The problematic release seems to stay on tomcat download page for quite a while. Wouldn't it be nice to add that to 5.5.26 README, or make the known issue outstanding to those who download the release?