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POWhat sort of configuration issues or problems might make Maven Assembly plugin go slowly?
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copied!<p>Our multi-module Maven project used to take 4-6 minutes to build. Over the past few months, it has increased to 20+ minutes per build. One symptom is that sometimes the build appears to pause until I hit <enter>. However, the Maven build still runs fine (6 minutes, no pauses) on our build server.</p> <p>The build command is <code>mvn clean package -D<profile></code></p> <p>Some of our plugins include:</p> <ul> <li>PMD </li> <li>FindBugs </li> <li>Assembly </li> <li>Thrift Compiler</li> <li>jspc-maven-plugin</li> <li>maven-replacer-plugin</li> </ul> <p>Also, we have an internal Nexus repository.</p> <p><strong>Update: Build Logs</strong></p> <p>Local Build: </p> <pre><code>[INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] Project Parent ............................. SUCCESS [17.703s] [INFO] Dependencies ............................... SUCCESS [0.109s] [INFO] Thrift Service ............................. SUCCESS [1:51.141s] [INFO] Thrift API Client Sample ................... SUCCESS [14.219s] [INFO] Application ................................ SUCCESS [14:07.984s] [INFO] Webapps Parent ............................. SUCCESS [1.250s] [INFO] Webapp A ................................... SUCCESS [27.547s] [INFO] Webapp B.................................... SUCCESS [20.672s] [INFO] Webapp C ................................... SUCCESS [1:14.656s] [INFO] Assembly ................................... SUCCESS [5:47.219s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 24:23.234s [INFO] Finished at: Fri Jan 27 10:47:38 EST 2012 [INFO] Final Memory: 25M/66M [INFO] ------------------------------------------------------------------------ </code></pre> <p>Build Server (Team City):</p> <pre><code>[02:16:31]: [INFO] ------------------------------------------------------------------------ [02:16:31]: [INFO] Reactor Summary: [02:16:31]: [INFO] [02:16:31]: [INFO] Project Parent ............................. SUCCESS [3.421s] [02:16:31]: [INFO] Dependencies ............................... SUCCESS [3.157s] [02:16:31]: [INFO] Thrift Service ............................. SUCCESS [41.314s] [02:16:31]: [INFO] Thrift API Client Sample ................... SUCCESS [1.220s] [02:16:31]: [INFO] Application ................................ SUCCESS [4:09.617s] [02:16:31]: [INFO] Webapps Parent ............................. SUCCESS [0.323s] [02:16:31]: [INFO] Webapp A ................................... SUCCESS [12.811s] [02:16:31]: [INFO] Webapp B ................................... SUCCESS [16.496s] [02:16:31]: [INFO] Webapp C ................................... SUCCESS [19.011s] [02:16:31]: [INFO] Assembly ................................... SUCCESS [1:45.872s] [02:16:31]: [INFO] ------------------------------------------------------------------------ [02:16:31]: [INFO] BUILD SUCCESS [02:16:31]: [INFO] ------------------------------------------------------------------------ [02:16:31]: [INFO] Total time: 7:33.655s [02:16:31]: [INFO] Finished at: Wed Jan 25 02:16:31 EST 2012 [02:16:31]: [INFO] Final Memory: 42M/317M [02:16:31]: [INFO] ------------------------------------------------------------------------ </code></pre> <p><strong>Update 2</strong></p> <p>Here is an empirical analysis of where my build is spending most of its time, using timestamp analysis provided by this bash script: <a href="https://gist.github.com/993139" rel="nofollow noreferrer">https://gist.github.com/993139</a></p> <p><img src="https://i.stack.imgur.com/PfPFb.gif" alt="Build Times by Task"></p> <p>It seems to me that I could disable FindBugs, PMD and Unit Tests for some builds. But I need the final build output - the Assembly. So let me focus my question - what can make Assembly Plugin run slowly?</p> <p><strong>Update 3</strong></p> <p>As expected, FindBugs, PMD and unit tests cut the build by over 50%</p> <pre><code>[INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] Project Parent .................................... SUCCESS [13.969s] [INFO] Dependencies ...................................... SUCCESS [0.094s] [INFO] Thrift Service .................................... SUCCESS [47.125s] [INFO] Thrift API Client Sample .......................... SUCCESS [11.922s] [INFO] Application ....................................... SUCCESS [3:10.922s] [INFO] Webapps parent .................................... SUCCESS [0.468s] [INFO] Webapp A .......................................... SUCCESS [18.157s] [INFO] Webapp B .......................................... SUCCESS [18.437s] [INFO] Webapp C .......................................... SUCCESS [1:00.672s] [INFO] Assembly .......................................... SUCCESS [3:55.969s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 9:58.609s [INFO] Finished at: Mon Feb 06 10:21:01 EST 2012 [INFO] Final Memory: 24M/59M [INFO] ---------------------------------------------------------------------- </code></pre> <p>I don't think that Assembly should take 4 minutes. During the assembly phase, I'm seeing a lot of the following:</p> <pre><code>[INFO] --- maven-assembly-plugin:2.2:single (assembly-full) @ assembly --- [INFO] Reading assembly descriptor: C:\projects\my-project\assembly/src/main/assembly/assembly-full.xml [INFO] project-2.9.3-SNAPSHOT/config/ already added, skipping [INFO] project-2.9.3-SNAPSHOT/config/ already added, skipping [INFO] project-2.9.3-SNAPSHOT/ already added, skipping [INFO] project-2.9.3-SNAPSHOT/var/ already added, skipping </code></pre> <p>Repeated with each assembly artifact. Could this somehow be the source of the slowness?</p>

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