Question

I have trouble creating the log file

I added in my pom.xml

<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.16</version>
</dependency>

then I placed log4j.properies under resources folder

# Define the root logger with appender file
log = /home/soumya/log4j
log4j.rootLogger = DEBUG, FILE

# Define the file appender
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=${log}/log.out

# Define the layout for file appender
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%m%n

Then in My java code I use

public class Test
{
static Logger logger = Logger.getLogger(Test.class.getName());
 public void testLog(){
 logger.info("testing ..!!!");
}

But when running I got below error and the log file is not created !!!

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation

My maven version is Apache Maven 2.2.1 (rdebian-6) and I am using ecclipse Indigo
Appreciate any help

Answer 1

SLF4j library needs to be included manually in your pom.xml

        <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>1.6.1</version>
        </dependency>
        <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>jcl-over-slf4j</artifactId>
                <version>1.6.1</version>
        </dependency>
        <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>1.6.1</version>
        </dependency>