# java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.transport.client.PreBuiltTransportClient **URL:** \ **Category:** Elasticsearch\ **Created:** [March 7, 2017, 9:34am UTC](https://discuss.elastic.co/t/java-lang-noclassdeffounderror-could-not-initialize-class-org-elasticsearch-transport-client-prebuilttransportclient/77624 "2017-03-07T09:34:39Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![ahmad](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@ahmad](https://discuss.elastic.co/u/ahmad)\ **Post date:** [March 7, 2017, 9:34am UTC](https://discuss.elastic.co/t/java-lang-noclassdeffounderror-could-not-initialize-class-org-elasticsearch-transport-client-prebuilttransportclient/77624/1 "2017-03-07T09:34:39Z")
java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.transport.client.PreBuiltTransportClient at storm.packetstorm.ESBolt.prepare(ESBolt.java:176) ~[enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] at org.apache.storm.daemon.executor$fn\_\_7945$fn\_\_7958.invoke(executor.clj:795) ~[enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] at org.apache.storm.util$async\_loop$fn\_\_625.invoke(util.clj:482) [enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] at clojure.lang.AFn.run(AFn.java:22) [enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] at java.lang.Thread.run(Thread.java:745) [?:1.8.0\_121] 7693 [Thread-21-es-writer-cardinalities-executor[7 7]] ERROR o.a.s.util - Async loop died! java.lang.NoClassDefFoundError: org/elasticsearch/plugins/NetworkPlugin at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0\_121] at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[?:1.8.0\_121] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0\_121] at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[?:1.8.0\_121] at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[?:1.8.0\_121] at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[?:1.8.0\_121] at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[?:1.8.0\_121] at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0\_121] at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[?:1.8.0\_121] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0\_121] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[?:1.8.0\_121] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0\_121] at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:84) ~[enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] at storm.packetstorm.ESBolt.prepare(ESBolt.java:176) ~[enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] at org.apache.storm.daemon.executor$fn\_\_7945$fn\_\_7958.invoke(executor.clj:795) ~[enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] at org.apache.storm.util$async\_loop$fn\_\_625.invoke(util.clj:482) [enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] at clojure.lang.AFn.run(AFn.java:22) [enrich-topology-0.2.0-SNAPSHOT-jar-with-dependencies.jar:?] * * * Getting above error even after adding maven dependency. Am I still missing something ??I am using elasticsearch 5.2.2. any help will be greatly appreciated. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 4, 2017, 9:34am UTC](https://discuss.elastic.co/t/java-lang-noclassdeffounderror-could-not-initialize-class-org-elasticsearch-transport-client-prebuilttransportclient/77624/2 "2017-04-04T09:34:51Z")
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