错误描述：
A composition unit with name MyApp already exists. Select a different application name.
分析：应用部署失败，应用相关的目录文件留在was中。
问题解决：
删除was下残留的应用相关目录。
路径：
<profile name>/config/cells/qcell/blas
<profile name>/config/cells/qcell/cus 英文摘录：
Resolving the problem
The manual workaround is to delete the /blas and /cus directories for the bad application from the configuration.
The resources will be located in the config directory of the profile.:
<profile name>/config/cells/qcell/blas <profile name>/config/cells/qcell/cus The WebSphere Application Server team has built interim fixes for this defect for WebSphere Application Server V7.0.0.7 and V7.0.0.11. If needed, these interim fixes can be obtained from the WebSphere Application Server Support through a PMR Request. Obtaining PM20642 will help avoid the out of sync configuration during failed deployments. 参考链接：