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missing org/eclipse/m2e/core/embedder/IMavenExecutionContextFactory [duplicate]

My pom.xml contains only one reference to SLF4J:
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-jdk14</artifactId>
<version>1.5.10</version>
</dependency>
I am getting this error:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J:
See http://www.slf4j.org/codes.html#StaticLoggerBinder for further
details.
I checked that URL and indeed it provides a solution: "Placing one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem. "
My question is: which classpath?
The system's %CLASSPATH%? (I don't have one! I will need to create it specifically for this)
Eclipse's project .classpath? (I think I tried this but it didn't help)
Other?
I found quite a few postings on the subject here on SO, but they all quote the same answer: "place ... on the class path".
Which classpath?

First of all in order to add SLF4J you should put ONE and only ONE of these dependencies in your pom.xml. It depends on what implementation you choose to use. Every dependency you add in the pom.xml is added automatically in the classpath. As long as you are using Eclipse there is no need to modify the system's %CLASSPATH%?
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version></version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version></version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version></version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-jdk14</artifactId>
<version></version>
<scope>compile</scope>
</dependency>
Last but not least you will have the error SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
Eclipse Juno and Indigo, when using the bundled maven version(m2e), are not suppressing the message SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". This behaviour is present from the m2e version 1.1.0.20120530-0009 and onwards.
Although, this is indicated as an error your logs will be saved normally. The highlighted error will still be present until there is a fix of this bug. More about this in the m2e support site.
The current available solution in order to suppress this message is to use an external maven version rather than the bundled version of Eclipse. You can find about this solution and more details regarding this bug in the question below.
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". error

Problem:
I'm using Maven to manage my dependencies. In my case, the reason I was getting this error was because I had more than one slf4j-simple jar in my system on my class path. The SLF4J documentation states:
Placing one (and only one) of slf4j-nop.jar slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem.
Solution:
Search for the following jars in your file system and remove all copies other than the one in .m3:
slf4j-nop
slf4j-simple
slf4j-log4j12
slf4j-jdk14
logback-classic

How do I fix "SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder"."

I have an application that has the following error message:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
This message occurs after I attempt to run any script for the application. I have found that, as it says, it does not create logs, so I have come up empty handed when something fails.
I am running this in Amazon Linux 2 which is closest to CentOS and Redhat.
I have found the following resources:
This issue is addressed here: http://www.slf4j.org/codes.html#StaticLoggerBinder
I can get the jar I need from here: https://repo1.maven.org/maven2/org/slf4j/slf4j-simple/1.6.2/slf4j-simple-1.6.2.jar
After taking this jar and dropping it into my application's /lib, nothing changes.
Other articles describe adding this file to the class path. In Linux, I get this:
# java -classpath /opt/opendj/lib/slf4j-simple-1.6.2.jar org.slf4j.impl.StaticLoggerBinder
Error: Could not find or load main class org.slf4j.impl.StaticLoggerBinder
# java -jar /opt/opendj/lib/slf4j-simple-1.6.2.jar org.slf4j.impl.StaticLoggerBinder
no main manifest attribute, in /opt/opendj/lib/slf4j-simple-1.6.2.jar
Am I trying to add it to the class path right?
If needed, you can reproduce this issue by doing the following:
Steps to reproduce the behavior:
Install a fresh version of OpenDJ onto CentOS or Amazon Linux2 EC2 Instance. Install java 1.8.0
specifically java-1.8.0-openjdk
Install the server in any configuration, then run a status script.
Expected behavior
Logs should generate and no warning message can be presented.

Firstly, you should take a look here : https://www.slf4j.org/codes.html
Also,you can try adding these SLF4J maven dependencies into your pom and let me know if this works:
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.13.3</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.13.3</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>2.13.3</version>
</dependency>
Note: Consider that the maven dependencies versions are being updated, then maybe you prefer use the lates version of the dependencies(for example for log4j-api is 2.17.0)
On the other hand, this post could help you as well:
https://mkyong.com/java/log4j2-failed-to-load-class-org-slf4j-impl-staticloggerbinder/

In my case I was getting this error while using MavenCli lib. I had missed to add maven-compat lib in pom.xml. Below is full sample code I had used.
Sample code :
MavenCli mavenCli=new MavenCli();
mavenCli.doMain(new String[]{"clean","install"}, path_of_project_dir, System.out, System.out);
Dependency required :
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-embedder</artifactId>
<version>3.6.3</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.30</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-compat</artifactId>
<version>3.6.3</version>
</dependency>

In my case, I was using the logback in a spring-boot app and faced this issue. It was related to incompatible versions of slf4j and logback which were coming from third party libraries. I excluded all of them and used these:
<!-- logging dependencies-->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>${logback.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
${logback.version} and ${slf4j.version} are coming from spring-boot-dependencies-2.X.X.pom file.

I hope it will help :)
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>2.0.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic -->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.4.5</version>
</dependency>

Why adding a dependency to slf4j-log4j12 does not make slf4j work properly?

I have a project using slf4j. So I need to provide an underlying framework.
I wanted to use log4j, so I specified the following dependency in my pom.xml, as specified here :
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.8.0-beta2</version>
</dependency>
But I still have the following error message :
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
which shouldn't appear anymore, according to this.
If I change the dependency to this one, found on the net, it works :
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.21</version>
</dependency>
Does anyone have an explanation ?

The issue simply came from using a beta version of slf4j. Specifying a dependency to a stable version makes it work correctly :
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.25</version>
</dependency>

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder", nothing helps

I created default Drools project, tried to launch it, but I have this error:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
what's wrong? I didn't change anything in project. Btw I have no pom.xml file, should I create one?
I checked some solutions, but nothing helps, please help

Add a runtime dependency to logback-classic. Or if you don't use maven/gradle/etc, then add the logback-classic jar in your classpath.
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<scope>runtime</scope>
</dependency>
See http://www.slf4j.org for more information and other options.

Eclipse - Failed to load class "org.slf4j.impl.StaticLoggerBinder" [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
SLF4J: Failed to load class org.slf4j.impl.StaticLoggerBinder error
I am using eclipse juno to run someone's else Java code using maven(m2eclipse plugin). But I am getting following message:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
On the official website, I found the following fix for this problem:
This error is reported when the org.slf4j.impl.StaticLoggerBinder class could not be loaded into memory.
This happens when no appropriate SLF4J binding could be found on the class path.
Placing one (and only one) of slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem.
So I copied slf4j-simple.jar in "C:\Program Files\Java\jdk1.7.0_07\lib". But I am still getting error.
Please guide me what is correct solution. I am a Java newbie.
Also can someone please mention what exactly should be the value for JAVA_HOME, CLASSPATH and CLASS variables. I am confused whether it should be path of jre or jdk or any?
UPDATE:
Following dependency for slf4j are there in project pom.xml.
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.5.6</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.5.6</version>
</dependency>
I have updated my project. Also the slf4j-api-1.5.6.jar and slf4j-simple-1.5.6.jar are showing up in "Maven dependencies" in my project. And org.slf4j.impl.StaticLoggerBinder.class is also present in slf4j-simple-1.5.6.jar

Eclipse Juno, Indigo and Kepler when using the bundled maven version(m2e), are not suppressing the message SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". This behaviour is present from the m2e version 1.1.0.20120530-0009 and onwards.
Although, this is indicated as an error your logs will be saved normally. The highlighted error will still be present until there is a fix of this bug. More about this in the m2e support site.
The current available solution is to use an external maven version rather than the bundled version of Eclipse. You can find about this solution and more details regarding this bug in the question below which i believe describes the same problem you are facing.
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". error

Did you update the project (right-click on the project, "Maven" > "Update project...")? Otherwise, you need to check if pom.xml contains the necessary slf4j dependencies, e.g.:
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.0</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.0</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.0</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>

After placing the jar file in desired location, you need to add the jar file by right click on
Project --> properties --> Java Build Path --> Libraries --> Add Jar.