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Maven error : Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher [duplicate]

Tags:

java

maven

I'd been stuck with this simple issue for an hour now. Maven was working fine last week, I don't know what went wrong it gives me this error. I tried all the ways to debug and all the solutions found in StackOverflow and many other places. I even tried replacing M2_HOME path with M3_HOME and MAVEN_HOME. Nothing worked. I'm on OS X. Below is the output of few maven commands. I'll be happy to provide more information

$ mvn
Error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher

$ which mvn
/Library/Maven-3.3.3/bin/mvn

$ echo $M2_HOME
/Library/Maven-3.3.3

$ echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home

$ which java
/usr/bin/java

$ /Library/Java/JavaVirtualMachines/jdk1.7.0_75.jdk/Contents/Home/bin/java -version
java version "1.7.0_75"
Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)

$ echo $PATH
/opt/local/bin:/opt/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Tomcat/bin:/Library/Maven-3.3.3/bin

$ java -version
java version "1.7.0_75"
Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)

$  ls -lR /Library/Maven-3.3.3
total 56
-rw-r--r--@  1 USERNAME  wheel  19091 Apr 22 04:58 LICENSE
-rw-r--r--@  1 USERNAME  wheel    182 Apr 22 04:58 NOTICE
-rw-r--r--@  1 USERNAME  wheel   2541 Apr 22 04:55 README.txt
drwxr-xr-x@  8 USERNAME  wheel    272 Oct 14 12:24 bin
drwxr-xr-x@  3 USERNAME  wheel    102 Oct 14 12:24 boot
drwxr-xr-x@  5 USERNAME  wheel    170 Apr 22 04:55 conf
drwxr-xr-x@ 75 USERNAME  wheel   2550 Oct 14 12:24 lib

/Library/Maven-3.3.3/bin:
total 64
-rw-r--r--@ 1 USERNAME  wheel   230 Apr 22 04:58 m2.conf
-rwxr-xr-x@ 1 USERNAME  wheel  7075 Apr 22 04:58 mvn
-rw-r--r--@ 1 USERNAME  wheel  6007 Apr 22 04:58 mvn.cmd
-rwxr-xr-x@ 1 USERNAME  wheel  1796 Apr 22 04:58 mvnDebug
-rw-r--r--@ 1 USERNAME  wheel  1513 Apr 22 04:58 mvnDebug.cmd
-rwxr-xr-x@ 1 USERNAME  wheel  1843 Apr 22 04:58 mvnyjp

/Library/Maven-3.3.3/boot:
total 104
-rw-r--r--@ 1 USERNAME  wheel  52684 Aug 29  2014 plexus-classworlds-2.5.2.jar

/Library/Maven-3.3.3/conf:
total 32
drwxr-xr-x@ 3 USERNAME  wheel    102 Apr 22 04:55 logging
-rw-r--r--@ 1 USERNAME  wheel  10216 Apr 22 04:55 settings.xml
-rw-r--r--@ 1 USERNAME  wheel   3649 Apr 22 04:55 toolchains.xml

/Library/Maven-3.3.3/conf/logging:
total 8
-rw-r--r--@ 1 USERNAME  wheel  1126 Apr 22 04:55 simplelogger.properties

/Library/Maven-3.3.3/lib:
total 18656
-rw-r--r--@ 1 USERNAME  wheel   136324 Jan 29  2015 aether-api-1.0.2.v20150114.jar
-rw-r--r--@ 1 USERNAME  wheel    12637 Apr 22 04:58 aether-api.license
-rw-r--r--@ 1 USERNAME  wheel    36745 Jan 29  2015 aether-connector-basic-1.0.2.v20150114.jar
-rw-r--r--@ 1 USERNAME  wheel    12637 Apr 22 04:58 aether-connector-basic.license
-rw-r--r--@ 1 USERNAME  wheel   172998 Jan 29  2015 aether-impl-1.0.2.v20150114.jar
-rw-r--r--@ 1 USERNAME  wheel    12637 Apr 22 04:58 aether-impl.license
-rw-r--r--@ 1 USERNAME  wheel    30705 Jan 29  2015 aether-spi-1.0.2.v20150114.jar
-rw-r--r--@ 1 USERNAME  wheel    12637 Apr 22 04:58 aether-spi.license
-rw-r--r--@ 1 USERNAME  wheel    25355 Jan 29  2015 aether-transport-wagon-1.0.2.v20150114.jar
-rw-r--r--@ 1 USERNAME  wheel    12637 Apr 22 04:58 aether-transport-wagon.license
-rw-r--r--@ 1 USERNAME  wheel   146876 Jan 29  2015 aether-util-1.0.2.v20150114.jar
-rw-r--r--@ 1 USERNAME  wheel    12637 Apr 22 04:58 aether-util.license
-rw-r--r--@ 1 USERNAME  wheel     4467 May  7  2013 aopalliance-1.0.jar
-rw-r--r--@ 1 USERNAME  wheel    44908 May  7  2013 cdi-api-1.0.jar
-rw-r--r--@ 1 USERNAME  wheel    21837 Apr 22 04:58 cdi-api.license
-rw-r--r--@ 1 USERNAME  wheel    41123 May  7  2013 commons-cli-1.2.jar
-rw-r--r--@ 1 USERNAME  wheel   173587 May  7  2013 commons-io-2.2.jar
-rw-r--r--@ 1 USERNAME  wheel   284220 May  7  2013 commons-lang-2.6.jar
drwxr-xr-x@ 3 USERNAME  wheel      102 Apr 22 04:55 ext
-rw-r--r--@ 1 USERNAME  wheel  2256213 Nov  1  2014 guava-18.0.jar
-rw-r--r--@ 1 USERNAME  wheel     2497 May  7  2013 javax.inject-1.jar
-rw-r--r--@ 1 USERNAME  wheel   293671 Jul 24  2013 jsoup-1.7.2.jar
-rw-r--r--@ 1 USERNAME  wheel     3449 Apr 22 04:58 jsoup.license
-rw-r--r--@ 1 USERNAME  wheel     5848 May  7  2013 jsr250-api-1.0.jar
-rw-r--r--@ 1 USERNAME  wheel    18116 Apr 22 04:58 jsr250-api.license
-rw-r--r--@ 1 USERNAME  wheel    66349 Apr 22 04:57 maven-aether-provider-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-aether-provider.license
-rw-r--r--@ 1 USERNAME  wheel    55090 Apr 22 04:56 maven-artifact-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-artifact.license
-rw-r--r--@ 1 USERNAME  wheel    14964 Apr 22 04:56 maven-builder-support-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-builder-support.license
-rw-r--r--@ 1 USERNAME  wheel   286726 Apr 22 04:58 maven-compat-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-compat.license
-rw-r--r--@ 1 USERNAME  wheel   631881 Apr 22 04:57 maven-core-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-core.license
-rw-r--r--@ 1 USERNAME  wheel    86051 Apr 22 04:58 maven-embedder-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-embedder.license
-rw-r--r--@ 1 USERNAME  wheel   160817 Apr 22 04:56 maven-model-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel   176410 Apr 22 04:56 maven-model-builder-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-model-builder.license
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-model.license
-rw-r--r--@ 1 USERNAME  wheel    46099 Apr 22 04:56 maven-plugin-api-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-plugin-api.license
-rw-r--r--@ 1 USERNAME  wheel    25957 Apr 22 04:57 maven-repository-metadata-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-repository-metadata.license
-rw-r--r--@ 1 USERNAME  wheel    43032 Apr 22 04:57 maven-settings-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    43154 Apr 22 04:57 maven-settings-builder-3.3.3.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-settings-builder.license
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 maven-settings.license
-rw-r--r--@ 1 USERNAME  wheel   375267 Feb 20  2015 org.eclipse.sisu.inject-0.3.0.jar
-rw-r--r--@ 1 USERNAME  wheel    12637 Apr 22 04:58 org.eclipse.sisu.inject.license
-rw-r--r--@ 1 USERNAME  wheel   205404 Feb 20  2015 org.eclipse.sisu.plexus-0.3.0.jar
-rw-r--r--@ 1 USERNAME  wheel    12637 Apr 22 04:58 org.eclipse.sisu.plexus.license
-rw-r--r--@ 1 USERNAME  wheel    13350 May  7  2013 plexus-cipher-1.7.jar
-rw-r--r--@ 1 USERNAME  wheel    21837 Apr 22 04:58 plexus-cipher.license
-rw-r--r--@ 1 USERNAME  wheel     4211 May  7  2013 plexus-component-annotations-1.5.5.jar
-rw-r--r--@ 1 USERNAME  wheel    62458 Oct 29  2014 plexus-interpolation-1.21.jar
-rw-r--r--@ 1 USERNAME  wheel    28555 May  7  2013 plexus-sec-dispatcher-1.3.jar
-rw-r--r--@ 1 USERNAME  wheel    21837 Apr 22 04:58 plexus-sec-dispatcher.license
-rw-r--r--@ 1 USERNAME  wheel   243128 Oct 29  2014 plexus-utils-3.0.20.jar
-rw-r--r--@ 1 USERNAME  wheel   399672 Feb 20  2015 sisu-guice-3.2.5-no_aop.jar
-rw-r--r--@ 1 USERNAME  wheel    26084 Jul 24  2013 slf4j-api-1.7.5.jar
-rw-r--r--@ 1 USERNAME  wheel    14853 Apr 22 04:58 slf4j-api.license
-rw-r--r--@ 1 USERNAME  wheel    10680 Aug 17  2013 slf4j-simple-1.7.5.jar
-rw-r--r--@ 1 USERNAME  wheel    14853 Apr 22 04:58 slf4j-simple.license
-rw-r--r--@ 1 USERNAME  wheel    11432 Apr 21 06:27 wagon-file-2.9.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 wagon-file.license
-rw-r--r--@ 1 USERNAME  wheel  2259073 Apr 21 06:32 wagon-http-2.9-shaded.jar
-rw-r--r--@ 1 USERNAME  wheel    11787 Apr 21 06:27 wagon-http-shared-2.9.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 wagon-http-shared.license
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 wagon-http.license
-rw-r--r--@ 1 USERNAME  wheel    53543 Apr 21 06:27 wagon-provider-api-2.9.jar
-rw-r--r--@ 1 USERNAME  wheel    11358 Apr 22 04:58 wagon-provider-api.license

/Library/Maven-3.3.3/lib/ext:
total 8
-rw-r--r--@ 1 USERNAME  wheel  152 Apr 22 04:55 README.txt
like image 720
Prashanth Avatar asked Oct 14 '15 19:10

Prashanth


2 Answers

Please remove M2_HOME as environment variable, it is already set by the mvn script. The only things you need to do is: add apache-maven-3.x.x/bin to your path, set JAVA_HOME as environment variable. So no need to add %JAVA_HOME%/bin to your path

Try to run mvn -v from /Library/Maven-3.3.3/bin/ folder first to confirm the installation is correct. Try to run mvn with xtrace info (tldp.org/LDP/Bash-Beginners-Guide/html/sect_02_03.html) and verify the commandline built up by Maven. I assume you get an unexpected classpath argument value.

like image 134
Robert Scholte Avatar answered Sep 17 '22 15:09

Robert Scholte


For absolute new people to maven, make sure you download the "Binary archives" from the Maven site, and not the "Source archives".

like image 41
Z3d4s Avatar answered Sep 18 '22 15:09

Z3d4s