httpclient errors while working on upgrading and cleaning up pom file

[Gavin Mogan]

I'm working on upgrading my pom file to work with the new 2.0 style parent plugin and harness but hitting road blocks again. I wasn't getting this error when I was running things on my macbook, but am getting it on my linux desktop.

Tests run: 6, Failures: 0, Errors: 5, Skipped: 0, Time elapsed: 49.411 sec <<< FAILURE! - in InjectedTest

org.jvnet.hudson.test.JellyTestSuiteBuilder$JellyTestSuite(org.jvnet.hudson.test.junit.FailedTest)  Time elapsed: 0.002 sec  <<< ERROR!

java.lang.NoClassDefFoundError: org/apache/http/config/Lookup

Caused by: java.lang.ClassNotFoundException: org.apache.http.config.Lookup

https://gist.github.com/4cb0f65d1abb1c717961386b90209bf3 is current pom file in question.

I've been trying to dig into this, but I can't figure out why this is failing, httpclient seems to be required by various plugins. I'm not directly requiring it, but I've tried and it still gives the error.

Any suggestions on what to do next would be greatly appreciated.

Debugging Information:

$ mvn -v

Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T08:41:47-08:00)

Maven home: /opt/apache-maven-3.3.9

Java version: 1.8.0_31, vendor: Oracle Corporation

Java home: /opt/jdk1.8.0_31/jre

Default locale: en_US, platform encoding: UTF-8

OS name: "linux", version: "3.10.0-327.22.2.el7.x86_64", arch: "amd64", family: "unix"

$ mvn org.apache.maven.plugins:maven-dependency-plugin:2.10:list | grep httpclient

[INFO]    commons-httpclient:commons-httpclient:jar:3.1:compile

[INFO]    org.apache.httpcomponents:httpclient:jar:4.2.5:compile

[Gavin Mogan]

Oh the reason I'm saying its httpclient, which may not be super clear from this error, is that its also erroring when I call jenkinsRule.getWebClient()

ex:

doJobReportTest(hudson.plugins.sauce_ondemand.SauceOnDemandBuildActionTest)  Time elapsed: 10.082 sec  <<< ERROR!

java.lang.NoClassDefFoundError: org/apache/http/conn/HttpClientConnectionManager

        at hudson.plugins.sauce_ondemand.SauceOnDemandBuildActionTest.doJobReportTest(SauceOnDemandBuildActionTest.java:59)

Caused by: java.lang.ClassNotFoundException: org.apache.http.conn.HttpClientConnectionManager

        at hudson.plugins.sauce_ondemand.SauceOnDemandBuildActionTest.doJobReportTest(SauceOnDemandBuildActionTest.java:59)

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[Kanstantsin Shautsou]

You should remember that jenkins has no classloader isolation and your project must use httpclient library version the first loaded into jenkins (could be from core or plugin). 

Check :dependency-tree

[Robert Sandell]

Yes, you most likely have multiple versions of httpclient on your classpath, and the reason for it working on one system but not the other could be because the classpath is constructed in another order, so you get an older version on the classpath before a newer one.

/B

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Robert Sandell

Software Engineer

CloudBees Inc.

[Jesse Glick]

On Mon, Jul 18, 2016 at 5:15 AM, Robert Sandell <rsan...@cloudbees.com> wrote:
> you most likely have multiple versions of httpclient on your classpath

Yes, use `mvn dependency:tree`, and generally either add an
`<exclude>` for the old one, or add an explicit dependency on a newer
one.