# Issue with elastic search 5.0.0 - java.lang.ClassNotFoundException: org.apache.logging.log4j.core.async.DaemonThreadFactory

**URL:** <https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345>\
**Category:** Elasticsearch\
**Created:** [October 29, 2016, 3:32pm UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345 "2016-10-29T15:32:17Z")\
**Posts on this page:** 10\
**Page:** 1

<div class="post-metadata">

**Author:** ![lao](https://avatars.discourse-cdn.com/v4/letter/l/4da419/32.png) [@lao](https://discuss.elastic.co/u/lao)\
**Post date:** [October 29, 2016, 3:32pm UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/1 "2016-10-29T15:32:17Z")

</div>

ERROR Could not reconfigure JMX java.lang.NoClassDefFoundError: org/apache/logging/log4j/core/async/DaemonThreadFactory  
at org.apache.logging.log4j.core.jmx.Server.createExecutor(Server.java:81)  
at org.apache.logging.log4j.core.jmx.Server.(Server.java:66)  
at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:541)  
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.logging.log4j.LogManager.getLogger(LogManager.java:551)  
at org.elasticsearch.common.logging.ESLoggerFactory.getLogger(ESLoggerFactory.java:49)  
at org.elasticsearch.common.logging.Loggers.getLogger(Loggers.java:105)  
at org.elasticsearch.common.logging.Loggers.getLogger(Loggers.java:72)  
at org.elasticsearch.common.component.AbstractComponent.(AbstractComponent.java:37)  
at org.elasticsearch.plugins.PluginsService.(PluginsService.java:110)  
at org.elasticsearch.client.transport.TransportClient.newPluginService(TransportClient.java:81)  
at org.elasticsearch.client.transport.TransportClient.buildTemplate(TransportClient.java:106)  
at org.elasticsearch.client.transport.TransportClient.(TransportClient.java:228)  
at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:69)  
at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:65)

pom.xml:

```
	<!-- https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch -->
	<dependency>
		<groupId>org.elasticsearch</groupId>
		<artifactId>elasticsearch</artifactId>
		<version>5.0.0</version>
	</dependency>
	<!-- https://mvnrepository.com/artifact/org.elasticsearch.client/transport -->
	<dependency>
		<groupId>org.elasticsearch.client</groupId>
		<artifactId>transport</artifactId>
		<version>5.0.0</version>
	</dependency>
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-api</artifactId>
		<version>2.7</version>
	</dependency>
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-core</artifactId>
		<version>2.7</version>
	</dependency>
```

---

<div class="post-metadata">

**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\
**Post date:** [October 29, 2016, 10:28pm UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/2 "2016-10-29T22:28:22Z")

</div>

> [@lao](#):
>
> Could not reconfigure JMX java.lang.NoClassDefFoundError: org/apache/logging/log4j/core/async/DaemonThreadFactory

Have you tried the system property `-DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector`  
as documented in [Log4j – Log4j 2 Lock-free Asynchronous Loggers for Low-Latency Logging](https://logging.apache.org/log4j/2.x/manual/async.html) ?

---

<div class="post-metadata">

**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\
**Post date:** [October 29, 2016, 10:32pm UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/3 "2016-10-29T22:32:46Z")

</div>

And you need to add a dependency to disruptor 3+, of course

```auto
<dependency>
    <groupId>com.lmax</groupId>
    <artifactId>disruptor</artifactId>
    <version>3.3.6</version>
</dependency>

```

---

<div class="post-metadata">

**Author:** ![fabiocatalao](https://avatars.discourse-cdn.com/v4/letter/f/779978/32.png) [@fabiocatalao](https://discuss.elastic.co/u/fabiocatalao)\
**Post date:** [October 31, 2016, 10:51am UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/4 "2016-10-31T10:51:58Z")

</div>

I'm having the same problem with org/apache/logging/log4j/core/async/DaemonThreadFactory.

1. I've added the attached dependencies to my pom;
2. I've created a basic log42j.xml config file;
3. I've set the DLog4jContextSelector system property.

Is there anything that I'm forgetting to do?

```
<dependencies>
	<dependency>
		<groupId>org.elasticsearch.client</groupId>
		<artifactId>transport</artifactId>
		<version>5.0.0</version>
	</dependency>
	<dependency>
		<groupId>org.elasticsearch</groupId>
		<artifactId>elasticsearch</artifactId>
		<version>5.0.0</version>
	</dependency>
	<dependency>
		<groupId>org.elasticsearch.plugin</groupId>
		<artifactId>transport-netty4-client</artifactId>
		<version>5.0.0</version>
		<type>jar</type>
	</dependency>
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-api</artifactId>
		<version>2.7</version>
	</dependency>
	<dependency>
		<groupId>org.apache.logging.log4j</groupId>
		<artifactId>log4j-core</artifactId>
		<version>2.7</version>
	</dependency>
	<dependency>
		<groupId>com.lmax</groupId>
		<artifactId>disruptor</artifactId>
		<version>3.3.6</version>
	</dependency>
</dependencies>
```

---

<div class="post-metadata">

**Author:** ![fabiocatalao](https://avatars.discourse-cdn.com/v4/letter/f/779978/32.png) [@fabiocatalao](https://discuss.elastic.co/u/fabiocatalao)\
**Post date:** [October 31, 2016, 12:26pm UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/5 "2016-10-31T12:26:34Z")

</div>

In order to run my app, I've temporarily disabled JMX.  
I've now the following arguments:

```
-DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector
-Dlog4j2.disable.jmx=true
-Dlog4j.configurationFile=log4j2.xml
```

---

<div class="post-metadata">

**Author:** ![msorah](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/msorah/32/61566_2.png) [@msorah](https://discuss.elastic.co/u/msorah)\
**Post date:** [November 1, 2016, 7:12pm UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/6 "2016-11-01T19:12:18Z")

</div>

Change the log4j versions to 2.6.2. DaemonThreadFactory is not in version 2.7 of log4j but is in 2.6.2

---

<div class="post-metadata">

**Author:** ![escay](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/escay/32/12344_2.png) [@escay](https://discuss.elastic.co/u/escay)\
**Post date:** [November 3, 2016, 10:29am UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/7 "2016-11-03T10:29:54Z")

</div>

Using log4j 2.6.2 indeed seems to work, I used the following dependencies for running integration tests:

```
<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.dummy</groupId>
    <artifactId>test.es.integration.tests</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>6.8.8</version>
        </dependency>
        <dependency>
            <groupId>org.elasticsearch.test</groupId>
            <artifactId>framework</artifactId>
            <version>5.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.6.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.6.2</version>
        </dependency>
    </dependencies>
</project>

```

Using log4j 2.7 I can make it work by disabling the JMX as follows:

```
<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.dummy</groupId>
    <artifactId>test.es.integration.tests</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.19.1</version>
                <configuration>
                    <systemPropertyVariables>
                        <!-- Disable JMX logging, because of Could not reconfigure JMX java.lang.NoClassDefFoundError: org/apache/logging/log4j/core/async/DaemonThreadFactory -->
                        <log4j2.disable.jmx>true</log4j2.disable.jmx>
                    </systemPropertyVariables>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>6.8.8</version>
        </dependency>
        <dependency>
            <groupId>org.elasticsearch.test</groupId>
            <artifactId>framework</artifactId>
            <version>5.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.7</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.7</version>
        </dependency>
    </dependencies>
</project>

```

I also tried setting the

`<Log4jContextSelector>org.apache.logging.log4j.core.async.AsyncLoggerContextSelector</Log4jContextSelector>`

and adding the disruptor dependency. This only works when the Log4J jmx is disabled. Otherwise I still get the

ERROR Could not reconfigure JMX java.lang.NoClassDefFoundError: org/apache/logging/log4j/core/async/DaemonThreadFactory

It also seems ES 5.0 is expecting Log4j version 2.6.2 and not yet 2.7.  
See [https://github.com/elastic/elasticsearch/pull/20805](https://github.com/elastic/elasticsearch/pull/20805) with targets of ES 5.1 an ES 6.0.  
So it is probably advised to use the 2.6.2 version and choose yourself if you want the low latency logging or not.

---

<div class="post-metadata">

**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\
**Post date:** [November 4, 2016, 12:22pm UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/8 "2016-11-04T12:22:31Z")

</div>

The issue here is indeed that you have the wrong version of the Log4j dependency, it should be 2.6.2, not 2.7 for the 5.0.0 release. The other stuff about async and the LMAX disruptor is not the problem. This is the ideal option.

If for some reason this option is not available to you, you can also set the system property `log4j2.is.webapp=true` or `log4j2.jmx.notify.async=false` (either will be fine).

---

<div class="post-metadata">

**Author:** ![anand\_rathi](https://avatars.discourse-cdn.com/v4/letter/a/8c91f0/32.png) [@anand\_rathi](https://discuss.elastic.co/u/anand_rathi)\
**Post date:** [January 12, 2017, 1:57am UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/9 "2017-01-12T01:57:49Z")

</div>

After adding correct log4j configuration this error goes away  
  
org.apache.logging.log4j  
log4j-api  
2.7  
  
  
org.apache.logging.log4j  
log4j-core  
2.7

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 10:04pm UTC](https://discuss.elastic.co/t/issue-with-elastic-search-5-0-0-java-lang-classnotfoundexception-org-apache-logging-log4j-core-async-daemonthreadfactory/64345/10 "2017-07-05T22:04:16Z")

</div>