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Posted to issues@maven.apache.org by "Eran Harel (JIRA)" <ji...@codehaus.org> on 2010/12/30 12:55:57 UTC
[jira] Created: (MJAR-140) Performance degredation
Performance degredation
------------------------
Key: MJAR-140
URL: http://jira.codehaus.org/browse/MJAR-140
Project: Maven 2.x Jar Plugin
Issue Type: Bug
Affects Versions: 2.3.1
Reporter: Eran Harel
I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
As a result I get the following warning:
{code}
[WARNING] *****************************************************************
[WARNING] * Your build is requesting parallel execution, but project *
[WARNING] * contains the following plugin(s) that are not marked as *
[WARNING] * @threadSafe to support parallel building. *
[WARNING] * While this /may/ work fine, please look for plugin updates *
[WARNING] * and/or request plugins be made thread-safe. *
[WARNING] * If reporting an issue, report it against the plugin in *
[WARNING] * question, not against maven-core *
[WARNING] *****************************************************************
[WARNING] The following plugins are not marked @threadSafe in DataBuilder:
[WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
[WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
[WARNING] *****************************************************************
{code}
I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
The build takes about x 1.5 longer now.
I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Commented: (MJAR-140) Performance degredation
Posted by "Eran Harel (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=249963#action_249963 ]
Eran Harel commented on MJAR-140:
---------------------------------
BTW, the 2.3.1 jar-plugin version has the same effect on maven 2.2.1 if it helps.
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: http://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x Jar Plugin
> Issue Type: Bug
> Affects Versions: 2.3.1
> Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Commented: (MJAR-140) Performance degredation
Posted by "Kristian Rosenvold (JIRA)" <ji...@codehaus.org>.
[ https://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=272150#comment-272150 ]
Kristian Rosenvold commented on MJAR-140:
-----------------------------------------
Yes, but it's not a simple answer.
The update to PlexusIoResourceCollection was done to achieve file attribute correctness. So the incorrect behaviour was fast but the correct behaviour is slower.
But all is not entirely lost. I have published pleus-archiver 2.0, plexus-io 2.0 and plexus-utils 3.0. If you add all of these to your plugin dependencies you will get an improvement in performance. To get back to the "original" speed you will actually have to use java 1.7. plexus-io 2.0 supports native file attributes through the java 1.7 api's. So with java 1.7 you should see little or no difference in performance from 2.2. For java 1.5/1.6, plexus-io 2.0 now forks the two "ls" forks in parallel, which should help some on the observed slowdown.
The slowdown affects all posix compliant systems.
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: https://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x JAR Plugin
> Issue Type: Bug
> Affects Versions: 2.3, 2.3.1
> Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Commented: (MJAR-140) Performance degredation
Posted by "Kristian Rosenvold (JIRA)" <ji...@codehaus.org>.
[ https://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=276639#comment-276639 ]
Kristian Rosenvold commented on MJAR-140:
-----------------------------------------
2.3.2 is available now
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: https://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x JAR Plugin
> Issue Type: Bug
> Affects Versions: 2.3, 2.3.1
> Reporter: Eran Harel
> Assignee: Kristian Rosenvold
> Fix For: 2.3.2
>
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Commented: (MJAR-140) Performance degredation
Posted by "Eran Harel (JIRA)" <ji...@codehaus.org>.
[ https://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=276628#comment-276628 ]
Eran Harel commented on MJAR-140:
---------------------------------
When will the 2.3.2 / 2.4 artifacts be available in the maven repository?
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: https://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x JAR Plugin
> Issue Type: Bug
> Affects Versions: 2.3, 2.3.1
> Reporter: Eran Harel
> Assignee: Kristian Rosenvold
> Fix For: 2.3.2
>
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Closed: (MJAR-140) Performance degredation
Posted by "Kristian Rosenvold (JIRA)" <ji...@codehaus.org>.
[ https://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kristian Rosenvold closed MJAR-140.
-----------------------------------
Resolution: Fixed
Fix Version/s: 2.4
Assignee: Kristian Rosenvold
I'm closing this as fixed with the 2.4 release. It is not /as/ fast as 2.3 (unless you use java7), but it's at least better. And correctnes is better than fast.
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: https://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x JAR Plugin
> Issue Type: Bug
> Affects Versions: 2.3, 2.3.1
> Reporter: Eran Harel
> Assignee: Kristian Rosenvold
> Fix For: 2.4
>
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Issue Comment Edited: (MJAR-140) Performance degredation
Posted by "Kristian Rosenvold (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=269849#action_269849 ]
Kristian Rosenvold edited comment on MJAR-140 at 6/8/11 5:21 PM:
-----------------------------------------------------------------
It would seem to me like this degradation occured when plexus-archiver switched to using PlexusIoProxyResourceCollection (0c17e83ae31786fd96f24d7ed5484e0e5df99a47) which possibly retrieves quite a lot of information we dont use. Especially on Linux this can be bad since plexus-io still uses forks to determine file attributes, which I am still not sure if we use/need.
was (Author: krosenvold):
It would seem to me like this degradation occured when plexus-archiver switched to using PlexusIoProxyResourceCollection which possibly retrieves quite a lot of information we dont use. Especially on Linux this can be bad since plexus-io still uses forks to determine file attributes, which I am still not sure if we use/need.
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: http://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x JAR Plugin
> Issue Type: Bug
> Affects Versions: 2.3, 2.3.1
> Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Updated: (MJAR-140) Performance degredation
Posted by "Dennis Lundberg (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dennis Lundberg updated MJAR-140:
---------------------------------
Affects Version/s: 2.3
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: http://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x Jar Plugin
> Issue Type: Bug
> Affects Versions: 2.3, 2.3.1
> Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Commented: (MJAR-140) Performance degredation
Posted by "Dennis Lundberg (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=249966#action_249966 ]
Dennis Lundberg commented on MJAR-140:
--------------------------------------
Can you please try with version 2.3 of the plugin to see what results you get?
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: http://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x Jar Plugin
> Issue Type: Bug
> Affects Versions: 2.3.1
> Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Commented: (MJAR-140) Performance degredation
Posted by "Erez Mazor (JIRA)" <ji...@codehaus.org>.
[ https://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=272148#comment-272148 ]
Erez Mazor commented on MJAR-140:
---------------------------------
Any updates on this issue?
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: https://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x JAR Plugin
> Issue Type: Bug
> Affects Versions: 2.3, 2.3.1
> Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Commented: (MJAR-140) Performance degredation
Posted by "Kristian Rosenvold (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=269849#action_269849 ]
Kristian Rosenvold commented on MJAR-140:
-----------------------------------------
It would seem to me like this degradation occured when plexus-archiver switched to using PlexusIoProxyResourceCollection which possibly retrieves quite a lot of information we dont use. Especially on Linux this can be bad since plexus-io still uses forks to determine file attributes, which I am still not sure if we use/need.
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: http://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x JAR Plugin
> Issue Type: Bug
> Affects Versions: 2.3, 2.3.1
> Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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[jira] Commented: (MJAR-140) Performance degredation
Posted by "Eran Harel (JIRA)" <ji...@codehaus.org>.
[ http://jira.codehaus.org/browse/MJAR-140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=249970#action_249970 ]
Eran Harel commented on MJAR-140:
---------------------------------
2.2 results:
{code}
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2:25.773s
[INFO] Finished at: Thu Dec 30 12:24:16 IST 2010
[INFO] Final Memory: 1001M/1575M
{code}
2.3 results
{code}
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4:30.299s
[INFO] Finished at: Thu Dec 30 15:06:08 IST 2010
[INFO] Final Memory: 1014M/1831M
[INFO] ------------------------------------------------------------------------
{code}
> Performance degredation
> ------------------------
>
> Key: MJAR-140
> URL: http://jira.codehaus.org/browse/MJAR-140
> Project: Maven 2.x Jar Plugin
> Issue Type: Bug
> Affects Versions: 2.3.1
> Reporter: Eran Harel
>
> I migrated maven to version 3.0.1 in order to utilize the parallel build experimental feature.
> As a result I get the following warning:
> {code}
> [WARNING] *****************************************************************
> [WARNING] * Your build is requesting parallel execution, but project *
> [WARNING] * contains the following plugin(s) that are not marked as *
> [WARNING] * @threadSafe to support parallel building. *
> [WARNING] * While this /may/ work fine, please look for plugin updates *
> [WARNING] * and/or request plugins be made thread-safe. *
> [WARNING] * If reporting an issue, report it against the plugin in *
> [WARNING] * question, not against maven-core *
> [WARNING] *****************************************************************
> [WARNING] The following plugins are not marked @threadSafe in DataBuilder:
> [WARNING] org.apache.maven.plugins:maven-eclipse-plugin:2.8
> [WARNING] org.apache.maven.plugins:maven-jar-plugin:2.2
> [WARNING] *****************************************************************
> {code}
> I upgraded the maven-jar-plugin to the latest version (2.3.1), and the message is gone, but now the builds take much longer: minutes added!!!
> The build takes about x 1.5 longer now.
> I also compared the maven 3 parallel build time with the new jar-plugin VS a serial build with the old 2.2 plugin version I had. The results are that same, while when using the parallel build with the 2.2 plugin I see a significant ~30% performance boost.
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