Maven Project is not downloading dependent Jar from pom.xml

[murali jackson]

Hi All,

I am trying to learn Maven Project by writing basic program.
I have added slf4j as dependency in the pom.xml. But when i give mvn install or mvn compile in the command line, it is not even trying to download the jar from repository and throws class not found exception.
Not sure what is the mistake im doing, please throw some light..

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.maven.hello</groupId>
  <artifactId>HelloWorld</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>HelloWorld</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
<dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>   
    <dependency>
   <groupId>org.slf4j</groupId>
   <artifactId>slf4j-api</artifactId>
   <version>1.6.1</version>      
    </dependency>
  </dependencies>
</project>

package com.maven.hello;

import org.slf4j.*;

/**
 * Hello world!
 *
 */
public class App
{
    public static void main( String[] args )
    {


       Logger log = LoggerFactory.getLogger(App.class);



    }
}

C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld>mvn compile
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building HelloWorld 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ HelloWorld
 ---
[debug] execute contextualize
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\MyStudies\MavenProjects\MavenHello
World\HelloWorld\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ HelloWorld --
-
[INFO] Compiling 1 source file to C:\MyStudies\MavenProjects\MavenHelloWorld\Hel
loWorld\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[3,0] package org.slf4j does not exist
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[15,7] cannot find symbol
symbol  : class Logger
location: class com.maven.hello.App
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[15,20] cannot find symbol
symbol  : variable LoggerFactory
location: class com.maven.hello.App
[INFO] 3 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.293s
[INFO] Finished at: Sun Jun 11 19:35:23 CDT 2017
[INFO] Final Memory: 13M/19M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.
3.2:compile (default-compile) on project HelloWorld: Compilation failure: Compil
ation failure:
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[3,0] package org.slf4j does not exist
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[15,7] cannot find symbol
[ERROR] symbol  : class Logger
[ERROR] location: class com.maven.hello.App
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[15,20] cannot find symbol
[ERROR] symbol  : variable LoggerFactory
[ERROR] location: class com.maven.hello.App
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
ch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureExc
eption
C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld>

[Jeanne Boyarsky]

That dependency looks right. Can you run Maven in debug mode (-X -e flags) and show the output?

Note that a "class not found" error is an actual runtime error. You are getting an actual missing dependency error.

Also note that the URL property is meant to be the URL for your project. It's optional but if you are using it, it wouldn't be the Maven URL.

[murali jackson]

Jeanne Boyarsky wrote:That dependency looks right. Can you run Maven in debug mode (-X -e flags) and show the output?

Note that a "class not found" error is an actual runtime error. You are getting an actual missing dependency error.

Also note that the URL property is meant to be the URL for your project. It's optional but if you are using it, it wouldn't be the Maven URL.

Hi Jeanne,

Thanks for the advise ...

As you said  the URL is optional and I dont need that now.
I have ran the compile in debug mode, please find the output below.

 java.compiler=j9jit24, maven.build.version=Apache Maven 3.0.4 (r1232337; 2012-0
1-17 02:44:56-0600), os.encoding=UTF8, com.ibm.util.extralibs.properties=, env.D
N=CN=S\,Murali,OU=TCS,OU=Managed Services,OU=US,DC=cna,DC=com, com.ibm.jcl.check
ClassPath=, env.WINDOWS_TRACING_FLAGS=3, env.PATH=C:\Program Files (x86)\Java\jr
e6\bin\;C:\Oracle\Ora10g\BIN\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32
\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Sybase\Ocs-12_0\dll\;C:\Syb
ase\Ocs-12_0\bin\;C:\Sybase\Asep\;C:\Sybase\SQLRemote\dll\;c:\Program Files (x86
)\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files (x86)\Microsoft SQL Serv
er\100\DTS\Binn\;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSSh
ell\Common7\IDE\;C:\Program Files\TortoiseSVN\bin;C:\unified-desktop (only for R
AD Plugins)\rad\win64\jdk\ibm\jdk6\jre\bin;C:\unified-desktop (only for RAD Plug
ins)\rad\win64\jdk\ibm\jdk6\bin;C:\Program Files\jEdit;C:\Program Files (x86)\Ap
ache Software Foundation\Tomcat 7.0\lib;C:\MyStudies\maven\apache-maven-3.5.0\bi
n;, user.language=en, com.ibm.oti.vm.bootstrap.library.path=C:\unified-desktop (
only for RAD Plugins)\rad\win64\jdk\ibm\jdk6\jre\bin\default;C:\unified-desktop
(only for RAD Plugins)\rad\win64\jdk\ibm\jdk6\jre\bin, env.WINDIR=C:\WINDOWS, su
n.boot.library.path=C:\unified-desktop (only for RAD Plugins)\rad\win64\jdk\ibm\
jdk6\jre\bin\default;C:\unified-desktop (only for RAD Plugins)\rad\win64\jdk\ibm
\jdk6\jre\bin, classworlds.conf=C:\MyStudies\maven\apache-maven-3.5.0\bin\..\bin
\m2.conf, env.SEE_MASK_NOZONECHECKS=0, java.version=1.6.0, env.PROCESSOR_IDENTIF
IER=Intel64 Family 6 Model 61 Stepping 4, GenuineIntel, user.timezone=America/Ch
icago, env.INCLUDE=C:\Sybase\Ocs-12_0\include\, env.TEMP=C:\Users\cac6584\AppDat
a\Local\Temp, sun.arch.data.model=64, env.WINDOWS_TRACING_LOGFILE=C:\BVTBin\Test
s\installpackage\csilogfile.log, java.endorsed.dirs=C:\unified-desktop (only for
 RAD Plugins)\rad\win64\jdk\ibm\jdk6\jre\lib\endorsed, com.ibm.oti.vm.library.ve
rsion=24, env.VSEDEFLOGDIR=C:\ProgramData\McAfee\DesktopProtection, env.HOMEDRIV
E=C:, sun.jnu.encoding=Cp1252, env.SYSTEMDRIVE=C:, jxe.current.romimage.version=
15, file.separator=\, java.specification.name=Java Platform API Specification, j
ava.class.version=50.0, user.country=US, java.home=C:\unified-desktop (only for
RAD Plugins)\rad\win64\jdk\ibm\jdk6\jre, env.APPDATA=C:\Users\cac6584\AppData\Ro
aming, env.PUBLIC=C:\Users\Public, java.vm.info=JRE 1.6.0 IBM J9 2.4 Windows 7 a
md64-64 jvmwa6460sr15-20131016_170922 (JIT enabled, AOT enabled)
J9VM - 20131016_170922
JIT  - r9_20130920_46510ifx2
GC   - GA24_Java6_SR15_20131016_1337_B170922, env.OS=Windows_NT, os.version=6.1
build 7601 Service Pack 1, env.USERID=CAC6584, java.awt.fonts=, path.separator=;
, java.vm.version=2.4, java.util.prefs.PreferencesFactory=java.util.prefs.Window
sPreferencesFactory, user.variant=, env.USERPROFILE=C:\Users\cac6584, env.LIB=C:
\Sybase\Ocs-12_0\lib\, console.encoding=Cp437, env.JAVA_HOME=C:\unified-desktop
(only for RAD Plugins)\rad\win64\jdk\ibm\jdk6\, java.awt.printerjob=sun.awt.wind
ows.WPrinterJob, env.TMP=C:\Users\cac6584\AppData\Local\Temp, env.PROGRAMFILES=C
:\Program Files, sun.io.unicode.encoding=UnicodeLittle, awt.toolkit=sun.awt.wind
ows.WToolkit, java.assistive=ON, ibm.signalhandling.sigint=true, user.home=C:\Us
ers\cac6584, env.SRV1=KCH1R400, env.COMMONPROGRAMFILES=C:\Program Files\Common F
iles, com.ibm.cpu.endian=little, env.SESSIONNAME=Console, java.specification.ven
dor=Sun Microsystems Inc., env.CLASSPATH=C:\Sybase\Asep\monclass.zip;C:\Sybase\A
sep\3pclass.zip;C:\unified-desktop (only for RAD Plugins)\rad\win64\jdk\ibm\jdk6
\jre\bin;C:\unified-desktop (only for RAD Plugins)\rad\win64\jdk\ibm\jdk6\bin;C:
\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\lib;C:\MyStudies\mave
n\apache-maven-3.5.0\bin;, ibm.signalhandling.sigchain=true, env.M2_HOME=C:\MySt
udies\maven\apache-maven-3.5.0\bin\.., java.vendor.url=http://www.ibm.com/, java
.library.path=C:\unified-desktop (only for RAD Plugins)\rad\win64\jdk\ibm\jdk6\j
re\bin\default;C:\unified-desktop (only for RAD Plugins)\rad\win64\jdk\ibm\jdk6\
jre\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files (x86)\Java\jre6\bin\;C:\
Oracle\Ora10g\BIN\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WI
NDOWS\System32\WindowsPowerShell\v1.0\;C:\Sybase\Ocs-12_0\dll\;C:\Sybase\Ocs-12_
0\bin\;C:\Sybase\Asep\;C:\Sybase\SQLRemote\dll\;c:\Program Files (x86)\Microsoft
 SQL Server\100\Tools\Binn\;c:\Program Files (x86)\Microsoft SQL Server\100\DTS\
Binn\;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7
\IDE\;C:\Program Files\TortoiseSVN\bin;C:\unified-desktop (only for RAD Plugins)
\rad\win64\jdk\ibm\jdk6\jre\bin;C:\unified-desktop (only for RAD Plugins)\rad\wi
n64\jdk\ibm\jdk6\bin;C:\Program Files\jEdit;C:\Program Files (x86)\Apache Softwa
re Foundation\Tomcat 7.0\lib;C:\MyStudies\maven\apache-maven-3.5.0\bin;;., env.N
UMBER_OF_PROCESSORS=4, env.COMMONPROGRAMFILES(X86)=C:\Program Files (x86)\Common
 Files, env.USERDNSDOMAIN=CNA.COM, env.PSMODULEPATH=C:\WINDOWS\system32\WindowsP
owerShell\v1.0\Modules\, env.CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworld
s.launcher.Launcher, env.MAVEN_CMD_LINE_ARGS=-X compile, java.vm.vendor=IBM Corp
oration, java.fullversion=JRE 1.6.0 IBM J9 2.4 Windows 7 amd64-64 jvmwa6460sr15-
20131016_170922 (JIT enabled, AOT enabled)
J9VM - 20131016_170922
JIT  - r9_20130920_46510ifx2
GC   - GA24_Java6_SR15_20131016_1337_B170922, java.runtime.name=Java(TM) SE Runt
ime Environment, maven.home=C:\MyStudies\maven\apache-maven-3.5.0\bin\.., env.TI
MEZONE=Central Daylight Time, java.class.path=C:\MyStudies\maven\apache-maven-3.
5.0\bin\..\boot\plexus-classworlds-2.4.jar, sun.java.command=org.codehaus.plexus
.classworlds.launcher.Launcher -X compile, env.PROGRAMW6432=C:\Program Files, ma
ven.version=3.0.4, env.PROGRAMFILES(X86)=C:\Program Files (x86), env.MAVEN_JAVA_
EXE="C:\unified-desktop (only for RAD Plugins)\rad\win64\jdk\ibm\jdk6\\bin\java.
exe", java.vm.specification.name=Java Virtual Machine Specification, env.LOGONSE
RVER=\\VSKCH1S128, java.vm.specification.version=1.0, env.PROCESSOR_ARCHITECTURE
=AMD64, env.COMMONPROGRAMW6432=C:\Program Files\Common Files, sun.cpu.endian=lit
tle, env.HOME=U:, env.FULLNAME=S,Murali (TCS) (Contractor), java.io.tmpdir=C:\Us
ers\cac6584\AppData\Local\Temp\, env.UATDATA=C:\WINDOWS\CCM\UATData\D9F8C395-CAB
8-491d-B8AC-179A1FE1BE77, env.PROCESSOR_REVISION=3d04, env.SHARED=S:, java.jcl.v
ersion=20131015_01, env.PROGRAMDATA=C:\ProgramData, env.COMSPEC=C:\WINDOWS\syste
m32\cmd.exe, ibm.system.encoding=Cp1252, ibm.signalhandling.rs=false, java.awt.g
raphicsenv=sun.awt.Win32GraphicsEnvironment, os.arch=amd64, java.ext.dirs=C:\uni
fied-desktop (only for RAD Plugins)\rad\win64\jdk\ibm\jdk6\jre\lib\ext, user.dir
=C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld, env.LOCALAPPDATA=C:\User
s\cac6584\AppData\Local, env.SYBASE=C:\Sybase\, line.separator=
, java.vm.name=IBM J9 VM, env.CLASSWORLDS_JAR="C:\MyStudies\maven\apache-maven-3
.5.0\bin\..\boot\plexus-classworlds-2.4.jar", env.PATHEXT=.COM;.EXE;.BAT;.CMD;.V
BS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC, com.ibm.oti.shared.enabled=false, com.ibm.vm.bi
tmode=64, env.MACHTYPE=Notebook, env.FAXSVR=KCH1F001, env.ERROR_CODE=0, jxe.lowe
st.romimage.version=15, env.USERNAME=cac6584, file.encoding=Cp1252, env.USERDOMA
IN=CNAW2K, com.ibm.oti.configuration=scar, java.specification.version=1.6, com.i
bm.oti.jcl.build=20131016_170922, env.USERSID=S-1-5-21-1757981266-1417001333-725
345543-353470, env.=C:=C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld, en
v.PROCESSOR_LEVEL=6}
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[DEBUG] resource with targetPath null
directory C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\resourc
es
excludes []
includes []
[INFO] skip non existing resourceDirectory C:\MyStudies\MavenProjects\MavenHello
World\HelloWorld\src\main\resources
[DEBUG] no use filter components
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ HelloWorld --
-
[DEBUG] org.apache.maven.plugins:maven-compiler-plugin:jar:2.3.2:
[DEBUG]    org.apache.maven:maven-plugin-api:jar:2.0.6:compile
[DEBUG]    org.apache.maven:maven-artifact:jar:2.0.6:compile
[DEBUG]    org.apache.maven:maven-core:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-settings:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.6:compi
le
[DEBUG]       org.apache.maven:maven-profile:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-model:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-repository-metadata:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-error-diagnostics:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-project:jar:2.0.6:compile
[DEBUG]          org.apache.maven:maven-plugin-registry:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-plugin-descriptor:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-artifact-manager:jar:2.0.6:compile
[DEBUG]       org.apache.maven:maven-monitor:jar:2.0.6:compile
[DEBUG]    org.apache.maven:maven-toolchain:jar:1.0:compile
[DEBUG]    org.codehaus.plexus:plexus-utils:jar:2.0.5:compile
[DEBUG]    org.codehaus.plexus:plexus-compiler-api:jar:1.8.1:compile
[DEBUG]    org.codehaus.plexus:plexus-compiler-manager:jar:1.8.1:compile
[DEBUG]    org.codehaus.plexus:plexus-compiler-javac:jar:1.8.1:runtime
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-compiler-p
lugin:2.3.2
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plug
ins:maven-compiler-plugin:2.3.2
[DEBUG]   Imported:  < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-compiler-pl
ugin:2.3.2
[DEBUG]   Included: org.apache.maven.plugins:maven-compiler-plugin:jar:2.3.2
[DEBUG]   Included: org.codehaus.plexus:plexus-utils:jar:2.0.5
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-api:jar:1.8.1
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-manager:jar:1.8.1
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-javac:jar:1.8.1
[DEBUG]   Excluded: org.apache.maven:maven-plugin-api:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-artifact:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-core:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-settings:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.6

[DEBUG]   Excluded: org.apache.maven:maven-profile:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-model:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-repository-metadata:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-error-diagnostics:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-project:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-plugin-registry:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-plugin-descriptor:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-artifact-manager:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-monitor:jar:2.0.6
[DEBUG]   Excluded: org.apache.maven:maven-toolchain:jar:1.0
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-compiler-plugin:2.3.2:co
mpile from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-compile
r-plugin:2.3.2, parent: sun.misc.Launcher$AppClassLoader@65f065f0]
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-compiler-plugin:2.3.2:c
ompile' with basic configurator -->
[DEBUG]   (f) basedir = C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld
[DEBUG]   (f) buildDirectory = C:\MyStudies\MavenProjects\MavenHelloWorld\HelloW
orld\target
[DEBUG]   (f) classpathElements = [C:\MyStudies\MavenProjects\MavenHelloWorld\He
lloWorld\target\classes]
[DEBUG]   (f) compileSourceRoots = [C:\MyStudies\MavenProjects\MavenHelloWorld\H
elloWorld\src\main\java]
[DEBUG]   (f) compilerId = javac
[DEBUG]   (f) debug = true
[DEBUG]   (f) encoding = UTF-8
[DEBUG]   (f) failOnError = true
[DEBUG]   (f) fork = false
[DEBUG]   (f) generatedSourcesDirectory = C:\MyStudies\MavenProjects\MavenHelloW
orld\HelloWorld\target\generated-sources\annotations
[DEBUG]   (f) optimize = false
[DEBUG]   (f) outputDirectory = C:\MyStudies\MavenProjects\MavenHelloWorld\Hello
World\target\classes
[DEBUG]   (f) outputFileName = HelloWorld-1.0-SNAPSHOT
[DEBUG]   (f) projectArtifact = com.maven.hello:HelloWorld:jar:1.0-SNAPSHOT
[DEBUG]   (f) session = org.apache.maven.execution.MavenSession@41c641c6
[DEBUG]   (f) showDeprecation = false
[DEBUG]   (f) showWarnings = false
[DEBUG]   (f) source = 1.5
[DEBUG]   (f) staleMillis = 0
[DEBUG]   (f) target = 1.5
[DEBUG]   (f) verbose = false
[DEBUG] -- end configuration --
[DEBUG] Using compiler 'javac'.
[DEBUG] Source directories: [C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWor
ld\src\main\java]
[DEBUG] Classpath: [C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\target
\classes]
[DEBUG] Output directory: C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\
target\classes
[DEBUG] Classpath:
[DEBUG]  C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\target\classes
[DEBUG] Source roots:
[DEBUG]  C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java
[DEBUG] Command line options:
[DEBUG] -d C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\target\classes
-classpath C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\target\classes;
 -sourcepath C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java
; C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\maven\
hello\App.java -g -nowarn -target 1.5 -source 1.5 -encoding UTF-8
[INFO] Compiling 1 source file to C:\MyStudies\MavenProjects\MavenHelloWorld\Hel
loWorld\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[3,0] package org.slf4j does not exist
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[15,7] cannot find symbol
symbol  : class Logger
location: class com.maven.hello.App
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[15,20] cannot find symbol
symbol  : variable LoggerFactory
location: class com.maven.hello.App
[INFO] 3 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.230s
[INFO] Finished at: Sun Jun 11 22:53:41 CDT 2017
[INFO] Final Memory: 13M/21M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.
3.2:compile (default-compile) on project HelloWorld: Compilation failure: Compil
ation failure:
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[3,0] package org.slf4j does not exist
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[15,7] cannot find symbol
[ERROR] symbol  : class Logger
[ERROR] location: class com.maven.hello.App
[ERROR] \MyStudies\MavenProjects\MavenHelloWorld\HelloWorld\src\main\java\com\ma
ven\hello\App.java:[15,20] cannot find symbol
[ERROR] symbol  : variable LoggerFactory
[ERROR] location: class com.maven.hello.App
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal o
rg.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on
 project HelloWorld: Compilation failure
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:213)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:84)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:59)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBu
ild(LifecycleStarter.java:183)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(Lifecycl
eStarter.java:161)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:60)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:37)
        at java.lang.reflect.Method.invoke(Method.java:611)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Laun
cher.java:290)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.jav
a:230)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(La
uncher.java:409)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:
352)
Caused by: org.apache.maven.plugin.CompilationFailureException: Compilation fail
ure
        at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompiler
Mojo.java:656)
        at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:128)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(Default
BuildPluginManager.java:101)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:209)
        ... 19 more
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureExc
eption
C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld>

[Jeanne Boyarsky]

murali jackson wrote:I have ran the compile in debug mode, please find the output below.

What do you mean by "running the compile"?

Have you tried running mvn clean install in debug mode? That's where it would show the attempted (or failed attempted) download of the dependency.

[John Joe]

Just give it a try

 <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.6.1</version>
        </dependency>

[murali jackson]

Jeanne Boyarsky wrote:

murali jackson wrote:I have ran the compile in debug mode, please find the output below.

What do you mean by "running the compile"?

Have you tried running mvn clean install in debug mode? That's where it would show the attempted (or failed attempted) download of the dependency.

Hi Jeanne,

Now its working, I don't know for sure what mistake I did before. Downloaded Maven again and ran the same command now its working..

Thanks very much for assisting me on this ...

C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld>mvn compile
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building HelloWorld 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-simple/1.6.1/sl
f4j-simple-1.6.1.pom
Downloaded: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-simple/1.6.1/slf
4j-simple-1.6.1.pom (2 KB at 4.4 KB/sec)
Downloading: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-parent/1.6.1/sl
f4j-parent-1.6.1.pom
Downloaded: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-parent/1.6.1/slf
4j-parent-1.6.1.pom (10 KB at 82.8 KB/sec)
Downloading: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-api/1.6.1/slf4j
-api-1.6.1.pom
Downloaded: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-api/1.6.1/slf4j-
api-1.6.1.pom (3 KB at 21.3 KB/sec)
Downloading: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-simple/1.6.1/sl
f4j-simple-1.6.1.jar
Downloading: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-api/1.6.1/slf4j
-api-1.6.1.jar
Downloaded: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-simple/1.6.1/slf
4j-simple-1.6.1.jar (8 KB at 15.3 KB/sec)
Downloaded: http://repo.maven.apache.org/maven2/org/slf4j/slf4j-api/1.6.1/slf4j-
api-1.6.1.jar (25 KB at 29.1 KB/sec)
[INFO]
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ HelloWorld
 ---
[debug] execute contextualize
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\MyStudies\MavenProjects\MavenHello
World\HelloWorld\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ HelloWorld --
-
[INFO] Compiling 1 source file to C:\MyStudies\MavenProjects\MavenHelloWorld\Hel
loWorld\target\classes
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.964s
[INFO] Finished at: Thu Jun 15 14:04:21 CDT 2017
[INFO] Final Memory: 15M/24M
[INFO] ------------------------------------------------------------------------
C:\MyStudies\MavenProjects\MavenHelloWorld\HelloWorld>

[murali jackson]

John Joe wrote:Just give it a try

 <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-simple</artifactId>
            <version>1.6.1</version>
        </dependency>

Its working now John I have posted the status in the above thread.
Thanks !!!

[Jeanne Boyarsky]

Glad to hear it is working now. I suspect your settings.xml got corrupted if a reinstall fixed the problem.

[murali jackson]

Jeanne Boyarsky wrote:Glad to hear it is working now. I suspect your settings.xml got corrupted if a reinstall fixed the problem.

Ok Jeane ..