So I'm writing a ant build file to run some tests, and I use the following line without any issue for MXUnit:
<taskdef name="mxunittask" classname="org.mxunit.ant.MXUnitAntTask" classpath="../mxunit/ant/lib/mxunit-ant.jar"/>
But when I download dbunit-2.4.8.jar from http://sourceforge.net/projects/dbunit/files/ and put it in the same directory as mxunit-ant.jar, then added the following line to the ANT build file:
<taskdef name="dbunit" classname="org.dbunit.ant.DbUnitTask" classpath="../mxunit/ant/lib/dbunit-2.4.8.jar"/>
For which I see a warning in Eclipse that says:
taskdef A class needed by class
org.dbunit.ant.DbUnitTask cannot be
found: org/slf4j/LoggerFactory
When I extract the jar file it does have the org.dbunit.ant.DbUnitTask class.. so I'm very confused as to what ANT is complaining about.. any idea what the issue is?
It looks like you need to make sure all the dependencies of DbUnit are satisfied, as well as installing the dbunit-2.4.8.jar.
The specific error you quote with class org/slf4j/LoggerFactory not being found suggests that you don't have the SLF4J classes needed. (Probably the latest version of slf4j-api.jar is needed there.)
Related
I have somewhat common problem with ant not being able to find the class org.apache.tools.ant.taskdefs.optional.ssh.SSHExec. However, the common solutions don't work for me:
ensuring that the jsch.jar and ant-jsch.jar exists in the classpath
ensuring that there are not multiple different versions of the mentioned jars
ensuring that ant -diagnostics is infact seeing the jars
I have no idea what I should try out next. The output I get is the good 'ol:
build.xml: Problem: failed to create task or type sshexec
Cause: the class org.apache.tools.ant.taskdefs.optional.ssh.SSHExec was not found.
This looks like one of Ant's optional components.
Action: Check that the appropriate optional JAR exists in
-/usr/share/ant/lib
-/opt/home/myname/.ant/lib
-a directory added on the command line with the -lib argument
Do not panic, this is a common problem.
The commonest cause is a missing JAR.
My setup:
ant version: Apache Ant(TM) version 1.9.2 compiled on January 22 2014
ant-jsch version: 1.9.2
jsch version: 0.1.52
Ant diagnostics log can be found here: http://pastebin.com/q5AURxuk
As seen from the diagnostics log, the jars are there but ant reports:
sshexec : Not Available (the implementation class is not present)
I also extracted the jar file and ensured that the class is there.
Any ideas?
I've been hit by nearly the same problem, especially ant -diagnostics shows that sshexec task is "Not available".
On my system the solution was to install package "ant-optional" additionally (as I've already posted here: ANT can't find specific libraries)
Maybe this helps.
Regards
Came across a problem very similar to yours, problem with SCP rather than SSH but otherwise the same. Tou don't say if you compiled Ant yourself ot used a binary distribution, but or us it turned out to be a problem with the ant-jsch.jar not compiling properly. There was no suggestion of a problem on compile, but the jar was much smaller than expected, only 6k. We fixed the issue by using the ant-jsch.jar from the binary distribution, which is 48k. This was with ant-1.9.4 and ant-1.9.5, Java 1.8.0_45.
I could not find a proper answer to the following question : while creating an executable jar from groovy compiled sources, I cannot simply include groovy-all-version.jar in a lib directory (as I would do in java) but I need to extract all the classes from the jar and package them with my own classes as otherwise I get an exception. This actually is the case with all libraries I may want to use.
Not clear ? Let's see an example.
toto.groovy belonging to package titi is compiled in a build directory which looks like this :
build
lib
groovy-all-1.8.4.jar
titi
toto.class
and a MANIFEST.MF that will be included in the jar contains the lines:
Main-Class: titi.toto
Class-Path: lib/groovy-all-1.8.4.jar
Executable jar creation is done with the following ant target in build.xml:
<jar destfile="${build.exe.dir}/${exe.name}"
basedir="${build.dir}"
manifest="${src.conf.dir}/MANIFEST.MF"
/>
Now if I try to execute the jar, I get
$ java -jar target/toto.jar
Exception in thread "main" java.lang.NoClassDefFoundError: groovy/lang/Script
(I've checked that the groovy.lang.Script class exists.)
On the other hand, if I unjar groovy-all-version.jar in build by adding an unjar task before the jar, execution goes fine. OK, it works, but it slows down the compilation process and I'd like to understand...
Any feedback is highly appreciated.
I tried several ways to install ant and junit on the same server as hudson. I eventually downloaded the Ant source, installed the optional dependencies by using the included fetch.xml file, built the source code, and dropped junit-4.8.1.jar into the lib directory where the compiled ant code [that I just built] is. Then I set ANT_HOME to the ant root directory by using the "export ANT_HOME=/usr/share/ant" command. I also set a Hudson configuration variable of "ANT_HOME" with the same value (/usr/share/ant) and I also put a new file into the /etc/profile.d directory with the export ANT_HOME command as well. At this point I'm not sure what else to try, but Hudson still gives me the error:
BUILD FAILED /var/lib/hudson/jobs/MyProject/build.xml:31: Problem:
failed to create task or type junit Cause: the class
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask was not found.
This looks like one of Ant's optional components. Action: Check that the appropriate optional JAR exists in
-/usr/share/ant/lib
-/var/lib/hudson/.ant/lib
-a directory added on the command line with the -lib argument
Do not panic, this is a common problem. The commonest cause is a
missing JAR.
This is not a bug; it is a configuration problem
I did, in fact, check /usr/share/ant/lib and the class "org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.class" is located in the ant-junit jar file as I confirmed by running the command: jar tfv ant-junit.jar | grep org.apache.tools.ant.taskdefs.optional.junit.JUnitTask
Can someone please tell me what to try, I am not sure where to go from here.
If you are on Ubuntu you can simply apt-get ant; I did that and linked to the junit jar within my project.
Cheers,
Neil
It turns out that hudson itself installs some version of Ant in one of its own libraries. I suppose that somehow caused a conflict because when I got rid of it, things worked. I think it is in /var/hudson or /var/hudson/lib. That path is added to the PATH environment variable during hudson installation. So your choice is either to add your own Ant install to the BEGINNING of the path, to delete hudson's version of Ant, or to delete that part of the PATH.
I'm using a #Grab annotation to grab the definition of an Html parser I can give to the XMLSlurper (I think it's the tagsoup parser) and all is good when I run my script from the cmd line. If I invoke the same script from Ant I get an Ivy NoClassDefFound error. I think it may berelated to having Ivy in Antlib. Is there another way to parse Html without customizing the slurper via #Grab?
This:
#Grab(group='org.ccil.cowan.tagsoup', module='tagsoup', version='1.2' )
doc = new XmlSlurper(new org.ccil.cowan.tagsoup.Parser()).parse(confluenceWebPageInputStream)
Works just fine from the command line but when I run it from an Ant build target:
<target name="update-wiki-chart">
<echo message="Will update chart for version ${version}"/>
<java dir="${basedir}" classname="groovy.lang.GroovyShell">
<arg value="ParseWikiPage.groovy"/>
<classpath refid="groovylib"/>
</java>
</target>
where groovyLib is a path ref pointing to the Groovy-1.8.6 jar downloaded from our internal Nexus repo, I get the NoClassDefFound error. I'm thinking this is probably due to having Ivy installed in Antlib causing the class loader to find it in two places. I just thought of something while writing this post. I can probably run java in forked mode or do something to cause it to not see/share Ant's classpath.It's been a few years since I've wrestled w/ Ant and class loader issues. My project is a little delinquent due to the bug and I'm looking for a quick/easy fix.
I just tried running my groovy on the cmd line via the "java" cmd and loading groovy-all jar in the class path and I realized that I get the NoClassDefFound error there as well. It has nothing to do with collisions with Ivy under Antlib. Rather, I am missing Ivy altogether. I had assumed it was included in Groovy-all.jar. I just need a clever way of passing Ivy from AntLib into my java task to get this all up and running.
Sounds like you're missing one or more jars from the classpath. I'd suggest digging around the classpathref you've labelled "groovylib".
A less error prone way to launch groovy from within ANT using the groovy ANT task.
Here's a similar example to your use-case:
Parse HTML using with an Ant Script
My example uses ivy directly to manage all build dependencies. The Grab annotations are still supported but obviously these would only manage the dependencies of the groovy script.
I'm having problems building my project, using an Ant script, from the command prompt using Ant itself. It can't find a certain import for a particular Java file in my project (which has nearly 5,000 source files as it is). The import is included in a .jar package whose location I have set in the Ant file itself. (As a pathelement, along with other needed JARs that either are fine, or haven't tried to been used when the crash occurs). The crash happens with javac, with the simple message of "import etc.ect.* cannot be found at line etc" Oddly enough, I can build the project just fine from the Ant file using an IDE like Eclipse. Any ideas what could be wrong? Thanks!
Wow, the solution was completely unrelated. It was a dumb fault in the java code where the class was trying to import .* from a directory that only had folders in it. For some reason, Eclipse didn't seem to mind, but javac did!
Eclipse's root classloader contains a lot of classes, when you run ant from console there's much less.
Just tell javac task to use the required .jar, and you'll be fine.
You should post the stack trace, does it say "import required by ..."? ( I forget the exact text). Likely there's a jar that's available in your eclipse environment that is not included in your ant script. Look in the stack trace for the missing class to identify the jar that's not being included in your build.