關於maven的tomcat7插件之deploy命令I/O exception

[INFO] --- tomcat7-maven-plugin:2.2:deploy (default-cli) @ RestApi ---
[INFO] Deploying war to http://localhost:8080/  
Uploading: http://localhost:8080/manager/text/deploy?path=%2F


[INFO] I/O exception (java.net.SocketException) caught when processing request: Connection reset by peer: socket write error
[INFO] Retrying request
Uploading: http://localhost:8080/manager/text/deploy?path=%2F


[INFO] I/O exception (java.net.SocketException) caught when processing request: Connection reset by peer: socket write error
[INFO] Retrying request
Uploading: http://localhost:8080/manager/text/deploy?path=%2F


[INFO] I/O exception (java.net.SocketException) caught when processing request: Connection reset by peer: socket write error
[INFO] Retrying request
Uploading: http://localhost:8080/manager/text/deploy?path=%2F


[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------

這個是因爲在webapps下已經存在了這個項目。無法執行覆蓋更新命令，需要執行redeploy命令纔可以覆蓋更新。或者執行undeploy先卸載存在的項目，然後再執行deploy即可。