Error while using Java High Level Rest Client

Elastic Stack Elasticsearch
1

Hi,
I am trying to develop a spring boot based elasticsearch project and I am trying to use Java High Level Rest Client in the same.
I am initializing the client like this:

RestHighLevelClient client = new RestHighLevelClient(
				RestClient.builder(
                                    new HttpHost("localhost", 9200, "http"), 
                                    new HttpHost("localhost", 9201, "http"))
                                  );

But I am encountering an exception caused by:

Caused by: java.lang.ClassNotFoundException: org.apache.lucene.util.Version
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_151]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_151]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) ~[na:1.8.0_151]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_151]
	... 54 common frames omitted

My pom.xml has the following dependencies:

        <dependency>
			<groupId>org.elasticsearch</groupId>
			<artifactId>elasticsearch</artifactId>
			<version>6.2.2</version>
		</dependency>
        <dependency>
			<groupId>org.elasticsearch.client</groupId>
			<artifactId>elasticsearch-rest-high-level-client</artifactId>
			<version>6.2.2</version>
		</dependency>

I have also tried adding

	<repositories>
		<repository>
			<id>elastic-lucene-snapshots</id>
			<name>Elastic Lucene Snapshots</name>
			<url>http://s3.amazonaws.com/download.elasticsearch.org/lucenesnapshots/00142c9</url>
			<releases>
				<enabled>true</enabled>
			</releases>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>

as mentioned in the documentation but the exception is still there.
I have also checked the mvn dependency:tree and lucene-core and other dependencies are there.
Please help me out.

2

Please format your code, logs or configuration files using </> icon as explained in this guide and not the citation button. It will make your post more readable.

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Please update your post and remove all the bold (**) you tried to add.

3

Hi David,
I have updated the query as suggested by you.
Thanks for the input.

4

Much better. Thanks!

Can you share the full dependency:tree ?

5

mvn dependency tree

+- org.elasticsearch:elasticsearch:jar:6.2.2:compile
 |  +- org.elasticsearch:elasticsearch-core:jar:6.2.2:compile
 |  +- org.apache.lucene:lucene-core:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-analyzers-common:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-backward-codecs:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-grouping:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-highlighter:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-join:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-memory:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-misc:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-queries:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-queryparser:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-sandbox:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-spatial:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-spatial-extras:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-spatial3d:jar:7.2.1:compile
 |  +- org.apache.lucene:lucene-suggest:jar:7.2.1:compile
 |  +- org.elasticsearch:securesm:jar:1.2:compile
 |  +- org.elasticsearch:elasticsearch-cli:jar:6.2.2:compile
 |  |  \- net.sf.jopt-simple:jopt-simple:jar:5.0.2:compile
 |  +- com.carrotsearch:hppc:jar:0.7.1:compile
 |  +- joda-time:joda-time:jar:2.9.9:compile
 |  +- org.yaml:snakeyaml:jar:1.19:compile
 |  +- com.fasterxml.jackson.core:jackson-core:jar:2.9.4:compile
 |  +- com.fasterxml.jackson.dataformat:jackson-dataformat-smile:jar:2.9.4:compile
 |  +- com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:jar:2.9.4:compile
 |  +- com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:jar:2.9.4:compile
 |  +- com.tdunning:t-digest:jar:3.0:compile
 |  +- org.hdrhistogram:HdrHistogram:jar:2.1.9:compile
 |  +- org.apache.logging.log4j:log4j-api:jar:2.10.0:compile
 |  \- org.elasticsearch:jna:jar:4.5.1:compile
 +- org.springframework.boot:spring-boot-starter-web:jar:2.0.0.RELEASE:compile
 |  +- org.springframework.boot:spring-boot-starter:jar:2.0.0.RELEASE:compile
 |  |  +- org.springframework.boot:spring-boot:jar:2.0.0.RELEASE:compile
 |  |  +- org.springframework.boot:spring-boot-autoconfigure:jar:2.0.0.RELEASE:compile
 |  |  +- org.springframework.boot:spring-boot-starter-logging:jar:2.0.0.RELEASE:compile
 |  |  |  +- ch.qos.logback:logback-classic:jar:1.2.3:compile
 |  |  |  |  \- ch.qos.logback:logback-core:jar:1.2.3:compile
 |  |  |  +- org.apache.logging.log4j:log4j-to-slf4j:jar:2.10.0:compile
 |  |  |  \- org.slf4j:jul-to-slf4j:jar:1.7.25:compile
 |  |  \- javax.annotation:javax.annotation-api:jar:1.3.2:compile
 |  +- org.springframework.boot:spring-boot-starter-json:jar:2.0.0.RELEASE:compile
 |  |  +- com.fasterxml.jackson.core:jackson-databind:jar:2.9.4:compile
 |  |  |  \- com.fasterxml.jackson.core:jackson-annotations:jar:2.9.0:compile
 |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.9.4:compile
 |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.9.4:compile
 |  |  \- com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.9.4:compile
 |  +- org.springframework.boot:spring-boot-starter-tomcat:jar:2.0.0.RELEASE:compile
 |  |  +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.5.28:compile
 |  |  +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.5.28:compile
 |  |  \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.5.28:compile
 |  +- org.hibernate.validator:hibernate-validator:jar:6.0.7.Final:compile
 |  |  +- javax.validation:validation-api:jar:2.0.1.Final:compile
 |  |  +- org.jboss.logging:jboss-logging:jar:3.3.2.Final:compile
 |  |  \- com.fasterxml:classmate:jar:1.3.4:compile
 |  +- org.springframework:spring-web:jar:5.0.4.RELEASE:compile
 |  |  \- org.springframework:spring-beans:jar:5.0.4.RELEASE:compile
 |  \- org.springframework:spring-webmvc:jar:5.0.4.RELEASE:compile
 |     +- org.springframework:spring-aop:jar:5.0.4.RELEASE:compile
 |     +- org.springframework:spring-context:jar:5.0.4.RELEASE:compile
 |     \- org.springframework:spring-expression:jar:5.0.4.RELEASE:compile
 +- org.springframework.boot:spring-boot-starter-test:jar:2.0.0.RELEASE:test
 |  +- org.springframework.boot:spring-boot-test:jar:2.0.0.RELEASE:test
 |  +- org.springframework.boot:spring-boot-test-autoconfigure:jar:2.0.0.RELEASE:test
 |  +- com.jayway.jsonpath:json-path:jar:2.4.0:test
 |  |  +- net.minidev:json-smart:jar:2.3:test
 |  |  |  \- net.minidev:accessors-smart:jar:1.2:test
 |  |  |     \- org.ow2.asm:asm:jar:5.0.4:test
 |  |  \- org.slf4j:slf4j-api:jar:1.7.25:compile
 |  +- junit:junit:jar:4.12:test
 |  +- org.assertj:assertj-core:jar:3.9.1:test
 |  +- org.mockito:mockito-core:jar:2.15.0:test
 |  |  +- net.bytebuddy:byte-buddy:jar:1.7.10:test
 |  |  +- net.bytebuddy:byte-buddy-agent:jar:1.7.10:test
 |  |  \- org.objenesis:objenesis:jar:2.6:test
 |  +- org.hamcrest:hamcrest-core:jar:1.3:test
 |  +- org.hamcrest:hamcrest-library:jar:1.3:test
 |  +- org.skyscreamer:jsonassert:jar:1.5.0:test
 |  |  \- com.vaadin.external.google:android-json:jar:0.0.20131108.vaadin1:test
 |  +- org.springframework:spring-core:jar:5.0.4.RELEASE:compile
 |  |  \- org.springframework:spring-jcl:jar:5.0.4.RELEASE:compile
 |  +- org.springframework:spring-test:jar:5.0.4.RELEASE:test
 |  \- org.xmlunit:xmlunit-core:jar:2.5.1:test
 +- org.springframework.boot:spring-boot-starter-actuator:jar:2.0.0.RELEASE:compile
 |  +- org.springframework.boot:spring-boot-actuator-autoconfigure:jar:2.0.0.RELEASE:compile
 |  |  \- org.springframework.boot:spring-boot-actuator:jar:2.0.0.RELEASE:compile
 |  \- io.micrometer:micrometer-core:jar:1.0.1:compile
 |     \- org.latencyutils:LatencyUtils:jar:2.0.3:compile
 \- org.elasticsearch.client:elasticsearch-rest-high-level-client:jar:6.2.2:compile
    +- org.elasticsearch.client:elasticsearch-rest-client:jar:6.2.2:compile
    |  +- org.apache.httpcomponents:httpclient:jar:4.5.5:compile
    |  +- org.apache.httpcomponents:httpcore:jar:4.4.9:compile
    |  +- org.apache.httpcomponents:httpasyncclient:jar:4.1.3:compile
    |  +- org.apache.httpcomponents:httpcore-nio:jar:4.4.9:compile
    |  +- commons-codec:commons-codec:jar:1.11:compile
    |  \- commons-logging:commons-logging:jar:1.1.3:compile
    +- org.elasticsearch.plugin:parent-join-client:jar:6.2.2:compile
    |  +- org.locationtech.spatial4j:spatial4j:jar:0.6:compile
    |  +- com.vividsolutions:jts:jar:1.13:compile
    |  \- org.apache.logging.log4j:log4j-core:jar:2.10.0:compile
    +- org.elasticsearch.plugin:aggs-matrix-stats-client:jar:6.2.2:compile
    \- org.elasticsearch.plugin:rank-eval-client:jar:6.2.2:compile
6

Nothing looks wrong as far as I can tell. May be share a minimalist sample project on github we can look at?

Note: I never tried with Spring boot yet with the High Level client. That's on my TODO list though :slight_smile:

7

Hi David,
I have pushed a basic version of the project on github.
Please find it here SpringBoot-ES

8

Well, I solved it.
RCA
Actually, it all started when I included

        <dependency>
			<groupId>org.elasticsearch.client</groupId>
			<artifactId>elasticsearch-rest-high-level-client</artifactId>
			<version>6.2.2</version>
		</dependency>

and it uses elasticsearch:5.6.8 and joda-time:2.9.9. then I started getting following exception

java.lang.ClassNotFoundException: org.joda.time.format.ISODateTimeFormat

To eliminate that I included

        <dependency>
			<groupId>org.elasticsearch</groupId>
			<artifactId>elasticsearch</artifactId>
			<version>6.2.2</version>
		</dependency>

and then I started getting

Caused by: java.lang.ClassNotFoundException: org.apache.lucene.util.Version
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_151]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_151]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) ~[na:1.8.0_151]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_151]
	... 54 common frames omitted

Actually, the problem was not with Lucene but with joda-time:2.9.9 in the first place.
So, to solve that include

		<dependency>
			<groupId>joda-time</groupId>
			<artifactId>joda-time</artifactId>
			<version>2.9.4</version>
		</dependency>

and remove

        <dependency>
			<groupId>org.elasticsearch</groupId>
			<artifactId>elasticsearch</artifactId>
			<version>6.2.2</version>
		</dependency>

from your pom.xml.

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9

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