Could not initialize class org.elasticsearch.threadpool.ThreadPool

Elastic Stack Elasticsearch
1

I am upgrading the elasticsearch version from 1.* to 2.1.1. I am using it in a storm topology:

<dependency>
	<groupId>org.elasticsearch</groupId>
	<artifactId>elasticsearch</artifactId>
	<version>2.1.1</version>
</dependency>

java version "1.8.0_45"
I am using shade plugin. the following code failed with NoClassDef exception:

Settings settings = Settings.settingsBuilder().put("cluster.name", elasticSearchCluster)
				.put("client.transport.ping_timeout", this.clientTimeout).build();
		TransportClient transportClient = TransportClient.builder().settings(settings).build();

java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.threadpool.ThreadPool
	at org.elasticsearch.client.transport.TransportClient$Builder.build(TransportClient.java:130)

What I am missing here?

Thanks,
Chen

2

It seems missing guava dependency. After adding guava dependency, the error disappeared.

<dependency>
	<groupId>com.google.guava</groupId>
	<artifactId>guava</artifactId>
	<version>19.0</version>
</dependency>