CODEWITHSUNDEEP
javaelasticsearch
AS-Sher
AS-Sher

Reputation: 369

Error when trying to use Elasticsearch Transport Client: dependencies not loaded to class path

I am using the following code to create a client on Elasticsearch:

Settings settings = Settings.builder()
    .put("cluster.name", "myClusterName")
    .build();
TransportClient client = new PreBuiltTransportClient(settings)
    .addTransportAddress(newInetSocketTransportAddress(InetAddress.getByName("127.0.0.1"), 9300));

I am getting these errors:

Exception in thread "main" java.lang.NoClassDefFoundError: org/elasticsearch/plugins/ActionPlugin
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.elasticsearch.transport.client.PreBuiltTransportClient.<clinit>(PreBuiltTransportClient.java:54)
    at exadatum.com.exadatum.elastic.testSearch.main(testSearch.java:30)
Caused by: java.lang.ClassNotFoundException: org.elasticsearch.plugins.ActionPlugin
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 14 more

Upvotes: 5

Views: 9349

Answers (1)

Dmitry Minkovsky
Dmitry Minkovsky

Reputation: 38143

Update: this is now documented at

Make sure the client dependency has been added to the class path:

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>transport</artifactId>
    <version>5.0.0-rc1</version>
</dependency>

This dependency may not be loading transitively from child dependencies.

You may also find that the main Elasticsearch and Apache Logging artifacts need to be on the class path as well:

<dependency>
    <groupId>org.elasticsearch</groupId>
    <artifactId>elasticsearch</artifactId>
    <version>5.0.0-rc1</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>

Upvotes: 12

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