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Eric Berry commented on MNG-4211: --------------------------------- We've also seen this issue in 2.1.0, 2.2.0, and 2.2.1. We are using Artifactory (2.0.8) as our maven proxy. We have Artifactory proxied behind Apache using SSL. Here is a sample error we get from Maven, unfortunately (-X is not turned on). This can happen with plugins or dependencies. The solution is to rerun maven 1 or more times until the problem goes away. [INFO] ------------------------------------------------------------------------ [ERROR] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] A required plugin was not found: Plugin could not be found - check that the goal name is correct: File: https://vmswdev1/artifactory/repo/com/ccadllc/firebird/maven/ccad-firebird-maven-flex-plugin/3.1.0-SNAPSHOT/ccad-firebird-maven-flex-plugin-3.1.0-SNAPSHOT.jar does not exist Try downloading the file manually from the project website. Then, install it using the command: mvn install:install-file -DgroupId=com.ccadllc.firebird.maven -DartifactId=ccad-firebird-maven-flex-plugin -Dversion=3.1.0-SNAPSHOT -Dpackaging=maven-plugin -Dfile=/path/to/file Alternatively, if you host your own repository you can deploy the file there: mvn deploy:deploy-file -DgroupId=com.ccadllc.firebird.maven -DartifactId=ccad-firebird-maven-flex-plugin -Dversion=3.1.0-SNAPSHOT -Dpackaging=maven-plugin -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id] com.ccadllc.firebird.maven:ccad-firebird-maven-flex-plugin:maven-plugin:3.1.0-SNAPSHOT from the specified remote repositories: central (https://vmswdev1/artifactory/repo) com.ccadllc.firebird.maven:ccad-firebird-maven-flex-plugin:maven-plugin:3.1.0-SNAPSHOT from the specified remote repositories: central (https://vmswdev1/artifactory/repo) [INFO] ------------------------------------------------------------------------ [INFO] For more information, run Maven with the -e switch > [regression] proxy access broken between maven version 2.0.10 and 2.1. > Probably due to addition of wagon 1.0-beta-4+ > --------------------------------------------------------------------------------------------------------------------- > > Key: MNG-4211 > URL: http://jira.codehaus.org/browse/MNG-4211 > Project: Maven 2 > Issue Type: Bug > Components: Artifacts and Repositories > Affects Versions: 2.1.0, 2.2.0 > Environment: WinXP SP2 > Reporter: Robert Glover Jr > Priority: Blocker > Fix For: 2.2.2 > > Attachments: jira_files_4_total.zip > > > At a large company, maven become impossible to use via proxy when maven > upgraded from 1.0.10 to 2.1. maven has always worked fine via proxy in 2.0.9 > and continues to work fine. however maven via proxy always fails in version > 2.1.0 and higher. > Attached is a zip file containing 1) log of GMAIL chat between the > creater of this JIRA and a maven developer. 2) two console outputs of > running maven 2.2. RC3 showing the proxy failure messages. 3) setting.xml > (with comments stripped out) -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.codehaus.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira