Tanuj created LOG4J2-2864:
-----------------------------

             Summary: Getting java.lang.ClassNotFoundException: 
com.mongodb.MongoClient while using mongodb-driver-sync(4.0.4) instead of 
mongo-java-driver
                 Key: LOG4J2-2864
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2864
             Project: Log4j 2
          Issue Type: Bug
          Components: Appenders, MongoDB
    Affects Versions: 2.13.3, 2.9.1
         Environment: Development.
            Reporter: Tanuj
             Fix For: 2.13.3, 2.9.1


I'm getting the below error while using the log4j2 with mongo-driver-sync 
instead of mongo-java-driver. Although it's working fine with 
mongo-java-driver. I'm trying to upgrade my mongo db with 4.2 and i'm using 
mongo java driver 4.0 that is mongo-driver-sync. So i have removed all the 
previous dependencies including mongo-java-driver. But Logging started giving 
me the below Errors. 
Error:
{code:java}
java.lang.ClassNotFoundException: com.mongodb.MongoClient
    at 
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1365)
    at 
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1188)
    at 
org.apache.logging.log4j.nosql.appender.mongodb.MongoDbProvider$Builder.build(MongoDbProvider.java:298)
    at 
org.apache.logging.log4j.nosql.appender.mongodb.MongoDbProvider$Builder.build(MongoDbProvider.java:132)
    at 
org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:122)
    at 
org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:942)
    at 
org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:882)
    at 
org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:874)
    at 
org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:874)
    at 
org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:498)
    at 
org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:227)
    at 
org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:239)
    at 
org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:530)
    at 
org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:603)
    at 
org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:620)
    at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:226)
    at 
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:152)
    at 
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
    at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
    at 
org.apache.commons.logging.LogFactory$Log4jLog.<clinit>(LogFactory.java:199)
    at 
org.apache.commons.logging.LogFactory$Log4jDelegate.createLog(LogFactory.java:166)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:109)
    at 
org.springframework.web.servlet.DispatcherServlet.<clinit>(DispatcherServlet.java:274)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at 
org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:151)
    at 
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1042)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:983)
    at 
org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4871)
    at 
org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5180)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at 
org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
    at 
org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at 
org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
    at 
java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
    at 
org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
    at 
org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at 
org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
    at 
org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at 
org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
    at 
java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
    at 
org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
    at 
org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at 
org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at 
org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:633)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:343)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:474)

{code}

Log4j2.xml:
{code}
<NoSql name="MongoAppender" bufferSize="10"> <!--Recommended bufferSize 
configuration to reduce frequent write operations. -->
            <MongoDb databaseName="mydb"
                collectionName="logs" server="localhost" port="27017"/>
            <ThresholdFilter level="WARN" onMatch="ACCEPT"
                onMismatch="DENY" />
        </NoSql>
{code}

Dependencies :
{code}
<dependency>
        <groupId>org.mongodb</groupId>
        <artifactId>mongodb-driver-sync</artifactId>
        <version>4.0.4</version>
    </dependency>

 <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-nosql</artifactId>
        <version>2.9.1</version>
    </dependency>
{code}



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