# Build from source but NoClassDefFoundError:ExtendedPluginsClassLoader **URL:** \ **Category:** Elasticsearch\ **Created:** [May 23, 2018, 2:01am UTC](https://discuss.elastic.co/t/build-from-source-but-noclassdeffounderror-extendedpluginsclassloader/132912 "2018-05-23T02:01:38Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![golmic](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/golmic/32/31494_2.png) [@golmic](https://discuss.elastic.co/u/golmic)\ **Post date:** [May 23, 2018, 2:01am UTC](https://discuss.elastic.co/t/build-from-source-but-noclassdeffounderror-extendedpluginsclassloader/132912/1 "2018-05-23T02:01:38Z")
**Elasticsearch version** (`bin/elasticsearch --version`): Version: 6.2.4 **Plugins installed** : [] None **JVM version** (`java -version`): java version "10.0.1" 2018-04-17 Java(TM) SE Runtime Environment 18.3 (build 10.0.1+10) Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.1+10, mixed mode) **OS version** (`uname -a` if on a Unix-like system): MacBook-Pro.local 17.5.0 Darwin Kernel Version 17.5.0 **Description of the problem including expected versus actual behavior** : I want to build ES and debug.ES6.2.4 **Steps to reproduce** : 1. download `https://github.com/elastic/elasticsearch/archive/v6.2.4.zip` and unzip 2. `cd` && `gradle idea` 3. `brew install elasticsearch` 4. [https://www.elastic.co/downloads/elasticsearch](https://www.elastic.co/downloads/elasticsearch) and download `https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.4.zip` copy elasticsearch-6.2.4’s modules and plugins to `/usr/local/var/elasticsearch` in idea, ```auto -Des.path.conf=/usr/local/etc/elasticsearch/ -Des.path.home=/usr/local/var/elasticsearch/ -Dlog4j2.disable.jmx=true ``` run `elasticsearch-6.2.4/server/src/main/java/org/elasticsearch/bootstrap/Elasticsearch.java` **Provide logs (if relevant)**: ```auto [2018-05-22T13:52:44,399][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [] fatal error in thread [main], exiting java.lang.NoClassDefFoundError: org/elasticsearch/plugins/ExtendedPluginsClassLoader at org.elasticsearch.plugins.PluginsService.loadBundle(PluginsService.java:494) ~[main/:?] at org.elasticsearch.plugins.PluginsService.loadBundles(PluginsService.java:422) ~[main/:?] at org.elasticsearch.plugins.PluginsService.(PluginsService.java:146) ~[main/:?] at org.elasticsearch.node.Node.(Node.java:303) ~[main/:?] at org.elasticsearch.node.Node.(Node.java:246) ~[main/:?] at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:213) ~[main/:?] at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:213) ~[main/:?] at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:323) ~[main/:?] at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[main/:?] at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[main/:?] at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[main/:?] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[main/:?] at org.elasticsearch.cli.Command.main(Command.java:90) ~[main/:?] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[main/:?] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85) ~[main/:?] Caused by: java.lang.ClassNotFoundException: org.elasticsearch.plugins.ExtendedPluginsClassLoader at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582) ~[?:?] at jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190) ~[?:?] at java.lang.ClassLoader.loadClass(ClassLoader.java:499) ~[?:?] ... 15 more ``` ---
**Author:** ![golmic](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/golmic/32/31494_2.png) [@golmic](https://discuss.elastic.co/u/golmic)\ **Post date:** [May 24, 2018, 4:57am UTC](https://discuss.elastic.co/t/build-from-source-but-noclassdeffounderror-extendedpluginsclassloader/132912/2 "2018-05-24T04:57:24Z")
please help me ---
**Author:** ![rjernst](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rjernst/32/6363_2.png) [@rjernst](https://discuss.elastic.co/u/rjernst)\ **Post date:** [May 26, 2018, 1:54am UTC](https://discuss.elastic.co/t/build-from-source-but-noclassdeffounderror-extendedpluginsclassloader/132912/3 "2018-05-26T01:54:06Z")
> please help me Please be patient. You're steps to reproduce seem to be different ways of installing elasticsearch, but not actually a list of steps to run. > copy elasticsearch-6.2.4’s modules and plugins to /usr/local/var/elasticsearch You should not modify the installation of elasticsearch. That can produce all kinds of weird errors. > run elasticsearch-6.2.4/server/src/main/java/org/elasticsearch/bootstrap/Elasticsearch.java Are you trying to run the Elasticsearch class directly, not with `bin/elasticsearch`? If so, that is unsupported. Elasticsearch requires a very particular java setup, and the bin script sets up this environment (including classpath) as Elasticsearch expects. Please give more detailed reproduction instructions. ---
**Author:** ![golmic](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/golmic/32/31494_2.png) [@golmic](https://discuss.elastic.co/u/golmic)\ **Post date:** [May 26, 2018, 2:47am UTC](https://discuss.elastic.co/t/build-from-source-but-noclassdeffounderror-extendedpluginsclassloader/132912/4 "2018-05-26T02:47:09Z")
hi! Thanks for reply. What I want to do is debug the Elasticsearch, which means I want to follow the step to find out what Elasticsearch does when I index a document or search. I use IntelliJ IDEA help me to do this. > Are you trying to run the Elasticsearch class directly, not with bin/elasticsearch I don't know what should I do after runing `gradle idea`. How to run the Elasticsearch class directly ? Thank you very much. ---
**Author:** ![rjernst](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rjernst/32/6363_2.png) [@rjernst](https://discuss.elastic.co/u/rjernst)\ **Post date:** [May 30, 2018, 7:58am UTC](https://discuss.elastic.co/t/build-from-source-but-noclassdeffounderror-extendedpluginsclassloader/132912/5 "2018-05-30T07:58:20Z")
For the stated purpose, it is best to checkout elasticsearch from GitHub. Once you have done this, `./gradlew idea` is only initialized the IntelliJ project. You then need to follow the instructions in the [CONTRIBUTING guide](https://github.com/elastic/elasticsearch/blob/master/CONTRIBUTING.md) for importing the project into IntelliJ. You can then add a "Remote" debug configuration in IntelliJ, [run elasticsearch from source](https://github.com/elastic/elasticsearch/blob/master/TESTING.asciidoc#launching-and-debugging-from-an-ide) and run the debug action in IntelliJ. . ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [June 27, 2018, 7:58am UTC](https://discuss.elastic.co/t/build-from-source-but-noclassdeffounderror-extendedpluginsclassloader/132912/6 "2018-06-27T07:58:22Z")
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