Getting Exceptions while running a Spring boot app with elasticsearch

Question

I was following this tutorial: https://www.youtube.com/watch?v=IiZZAu2Qtp0&ab_channel=LiliumCode

and the only changes I made were that I was using maven with eclipse instead. The rest of the code is exactly the same. When I run the app I get:

    org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'personController' defined in file [D:\Java Programs\Spring\elasticsearch\target\classes\com\elastic\elasticsearch\controller\PersonController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'personService' defined in file [D:\Java Programs\Spring\elasticsearch\target\classes\com\elastic\elasticsearch\service\PersonService.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personRepository' defined in com.elastic.elasticsearch.repository.PersonRepository defined in @EnableElasticsearchRepositories declared on Config: Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository]: Constructor threw exception; nested exception is org.springframework.data.elasticsearch.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed]; nested: ExecutionException[org.apache.http.ConnectionClosedException: Connection is closed]; nested: ConnectionClosedException[Connection is closed];
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.16.jar:5.3.16]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.16.jar:5.3.16]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.4.jar:2.6.4]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) ~[spring-boot-2.6.4.jar:2.6.4]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) ~[spring-boot-2.6.4.jar:2.6.4]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-2.6.4.jar:2.6.4]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.4.jar:2.6.4]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.4.jar:2.6.4]
    at com.elastic.elasticsearch.ElasticsearchApplication.main(ElasticsearchApplication.java:10) ~[classes/:na]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'personService' defined in file [D:\Java Programs\Spring\elasticsearch\target\classes\com\elastic\elasticsearch\service\PersonService.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personRepository' defined in com.elastic.elasticsearch.repository.PersonRepository defined in @EnableElasticsearchRepositories declared on Config: Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository]: Constructor threw exception; nested exception is org.springframework.data.elasticsearch.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed]; nested: ExecutionException[org.apache.http.ConnectionClosedException: Connection is closed]; nested: ConnectionClosedException[Connection is closed];
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.16.jar:5.3.16]
    ... 19 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personRepository' defined in com.elastic.elasticsearch.repository.PersonRepository defined in @EnableElasticsearchRepositories declared on Config: Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository]: Constructor threw exception; nested exception is org.springframework.data.elasticsearch.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed]; nested: ExecutionException[org.apache.http.ConnectionClosedException: Connection is closed]; nested: ConnectionClosedException[Connection is closed];
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.16.jar:5.3.16]
    ... 33 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository]: Constructor threw exception; nested exception is org.springframework.data.elasticsearch.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed]; nested: ExecutionException[org.apache.http.ConnectionClosedException: Connection is closed]; nested: ConnectionClosedException[Connection is closed];
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:224) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.lambda$instantiateClass$5(RepositoryFactorySupport.java:578) ~[spring-data-commons-2.6.2.jar:2.6.2]
    at java.base/java.util.Optional.map(Optional.java:260) ~[na:na]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.instantiateClass(RepositoryFactorySupport.java:578) ~[spring-data-commons-2.6.2.jar:2.6.2]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getTargetRepositoryViaReflection(RepositoryFactorySupport.java:543) ~[spring-data-commons-2.6.2.jar:2.6.2]
    at org.springframework.data.elasticsearch.repository.support.ElasticsearchRepositoryFactory.getTargetRepository(ElasticsearchRepositoryFactory.java:74) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:324) ~[spring-data-commons-2.6.2.jar:2.6.2]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:322) ~[spring-data-commons-2.6.2.jar:2.6.2]
    at org.springframework.data.util.Lazy.getNullable(Lazy.java:230) ~[spring-data-commons-2.6.2.jar:2.6.2]
    at org.springframework.data.util.Lazy.get(Lazy.java:114) ~[spring-data-commons-2.6.2.jar:2.6.2]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:328) ~[spring-data-commons-2.6.2.jar:2.6.2]
    at org.springframework.data.elasticsearch.repository.support.ElasticsearchRepositoryFactoryBean.afterPropertiesSet(ElasticsearchRepositoryFactoryBean.java:69) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.16.jar:5.3.16]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.16.jar:5.3.16]
    ... 44 common frames omitted
Caused by: org.springframework.data.elasticsearch.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed]; nested: ExecutionException[org.apache.http.ConnectionClosedException: Connection is closed]; nested: ConnectionClosedException[Connection is closed];
    at org.springframework.data.elasticsearch.core.ElasticsearchExceptionTranslator.translateExceptionIfPossible(ElasticsearchExceptionTranslator.java:72) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.translateException(ElasticsearchRestTemplate.java:427) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.execute(ElasticsearchRestTemplate.java:410) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at org.springframework.data.elasticsearch.core.RestIndexTemplate.doExists(RestIndexTemplate.java:103) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at org.springframework.data.elasticsearch.core.AbstractIndexTemplate.exists(AbstractIndexTemplate.java:134) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository.<init>(SimpleElasticsearchRepository.java:92) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[na:na]
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[na:na]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211) ~[spring-beans-5.3.16.jar:5.3.16]
    ... 57 common frames omitted
Caused by: org.elasticsearch.ElasticsearchException: java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed
    at org.elasticsearch.client.RestHighLevelClient.performClientRequest(RestHighLevelClient.java:2078) ~[elasticsearch-rest-high-level-client-7.15.2.jar:7.15.2]
    at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1732) ~[elasticsearch-rest-high-level-client-7.15.2.jar:7.15.2]
    at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1717) ~[elasticsearch-rest-high-level-client-7.15.2.jar:7.15.2]
    at org.elasticsearch.client.IndicesClient.exists(IndicesClient.java:963) ~[elasticsearch-rest-high-level-client-7.15.2.jar:7.15.2]
    at org.springframework.data.elasticsearch.core.RestIndexTemplate.lambda$doExists$2(RestIndexTemplate.java:103) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.execute(ElasticsearchRestTemplate.java:408) ~[spring-data-elasticsearch-4.3.2.jar:4.3.2]
    ... 66 common frames omitted
Caused by: java.util.concurrent.ExecutionException: org.apache.http.ConnectionClosedException: Connection is closed
    at org.elasticsearch.common.util.concurrent.BaseFuture$Sync.getValue(BaseFuture.java:262) ~[elasticsearch-7.15.2.jar:7.15.2]
    at org.elasticsearch.common.util.concurrent.BaseFuture$Sync.get(BaseFuture.java:249) ~[elasticsearch-7.15.2.jar:7.15.2]
    at org.elasticsearch.common.util.concurrent.BaseFuture.get(BaseFuture.java:76) ~[elasticsearch-7.15.2.jar:7.15.2]
    at org.elasticsearch.client.RestHighLevelClient.performClientRequest(RestHighLevelClient.java:2075) ~[elasticsearch-rest-high-level-client-7.15.2.jar:7.15.2]
    ... 71 common frames omitted
Caused by: org.apache.http.ConnectionClosedException: Connection is closed
    at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.endOfInput(HttpAsyncRequestExecutor.java:356) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:261) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:87) ~[httpasyncclient-4.1.5.jar:4.1.5]
    at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:40) ~[httpasyncclient-4.1.5.jar:4.1.5]
    at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591) ~[httpcore-nio-4.4.15.jar:4.4.15]
    at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]

My elasticsearch.yml:

# ======================== Elasticsearch Configuration =========================
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
#       Before you set out to tweak and tune the configuration, make sure you
#       understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
cluster.name: elastic_course
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
node.name: crud_node
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
#path.data: /path/to/data
#
# Path to log files:
#
#path.logs: /path/to/logs
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
#bootstrap.memory_lock: true
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# By default Elasticsearch is only accessible on localhost. Set a different
# address here to expose this node on the network:
#
#network.host: 192.168.0.1
#
# By default Elasticsearch listens for HTTP traffic on the first free port it
# finds starting at 9200. Set a specific HTTP port here:
#
#http.port: 9200
#
# For more information, consult the network module documentation.
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when this node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
#discovery.seed_hosts: ["host1"]
#
#discovery.type: single-node
#
# Bootstrap the cluster using an initial set of master-eligible nodes:
#
#cluster.initial_master_nodes: ["node-1"]
#
# For more information, consult the discovery and cluster formation module documentation.
#
# ---------------------------------- Various -----------------------------------
#
# Allow wildcard deletion of indices:
#
#action.destructive_requires_name: false

#----------------------- BEGIN SECURITY AUTO CONFIGURATION -----------------------
#
# The following settings, TLS certificates, and keys have been automatically
# generated to configure Elasticsearch security features on 10-03-2022 10:08:43
#
# --------------------------------------------------------------------------------

# Enable security features
xpack.security.enabled: true

xpack.security.enrollment.enabled: true

# Enable encryption for HTTP API client connections, such as Kibana, Logstash, and Agents
xpack.security.http.ssl:
  enabled: true
  keystore.path: certs/http.p12

# Enable encryption and mutual authentication between cluster nodes
xpack.security.transport.ssl:
  enabled: true
  verification_mode: certificate
  keystore.path: certs/transport.p12
  truststore.path: certs/transport.p12
# Create a new cluster with the current node only
# Additional nodes can still join the cluster later
cluster.initial_master_nodes: ["DESKTOP-0O0S7HQ"]

# Allow HTTP API connections from localhost and local networks
# Connections are encrypted and require user authentication
http.host: [_local_, _site_]

# Allow other nodes to join the cluster from localhost and local networks
# Connections are encrypted and mutually authenticated
#transport.host: [_local_, _site_]

#----------------------- END SECURITY AUTO CONFIGURATION -------------------------

I have tried out searching the exceptions online but nothing seems to work. Please help me in figuring this out. Thank you.

ConnectionClosedException seems to hint at the fac that your Spring Boot application cannot establish a connection to your ES cluster, maybe? — Val
– Val, Commented Mar 15, 2022 at 8:01
When I run the app, on cmd window where ES is running I get "received plaintext http traffic on an https channel, closing connection" message. Is this helpful? — Siddhant Sharma
– Siddhant Sharma, Commented Mar 15, 2022 at 8:18
Yes, it looks like you're using ES8, so you can find the answer to your question in this thread: stackoverflow.com/q/71469707/4604579 (hint: SSL/TLS is on by default in ES8) — Val
– Val, Commented Mar 15, 2022 at 8:20
Yes I can access through https but I want the application to run. The application is not running and when I run I get the above exception in eclipse and the plaintext message on the cmd window. — Siddhant Sharma
– Siddhant Sharma, Commented Mar 15, 2022 at 8:28
...which means the application is accessing ES using http instead of https — Val
– Val, Commented Mar 15, 2022 at 8:29

Val · Accepted Answer · 2022-03-15 09:47:05Z

1

ConnectionClosedException seems to hint at the fact that your Spring Boot application cannot establish a connection to your ES cluster.

It looks like you're using ES8, which has SSL/TLS on by default, so you would need to configure your Spring Boot application to use SSL instead.

At 6:00 into the video, elasticsearch.url in application.properties should be https://localhost:9200 instead of just localhost:9200.

However, as of March 15th 2022, it doesn't seem like ES 8 is supported by Spring Data ES yet, you might need to revert to the ES 7.15+ release.

edited Mar 15, 2022 at 9:47

answered Mar 15, 2022 at 8:41

Val

218k14 gold badges377 silver badges384 bronze badges

Sign up to request clarification or add additional context in comments.

8 Comments

Siddhant Sharma Over a year ago

I changed the elasticsearch.url as you said but now I get: Caused by: org.springframework.data.elasticsearch.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: java.net.UnknownHostException: No such host is known (localhost:9200); nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: java.net.UnknownHostException: No such host is known (localhost:9200)];

Val Over a year ago

Can you update your question with your elasticsearch.yml configuration?

Siddhant Sharma Over a year ago

I have added my config file.

Val Over a year ago

Which Spring Boot and Spring Data ES versions do you use?

Siddhant Sharma Over a year ago

spring boot: 2.6.4, spring data ES: 4.3.2

|

zenuve · Accepted Answer · 2022-08-01 16:58:13Z

A working spring boot client config with SpringBoot 2.7.1 and Elastic 8.3.3

//Below 3 lines are added to make elastic client version 7.17.4 compatible with elastic server version 8x
 HttpHeaders compatibilityHeaders = new HttpHeaders();
        compatibilityHeaders.add("Accept", "application/vnd.elasticsearch+json;compatible-with=7");
        compatibilityHeaders.add("Content-Type", "application/vnd.elasticsearch+json;"
                + "compatible-with=7");

        final ClientConfiguration clientConfiguration =
                ClientConfiguration
                        .builder()
                        .connectedTo(<HostName without https://> + ":" + <Port>)
                        .usingSsl()
                        .withBasicAuth(esConnectionDetails.getUsername(), esConnectionDetails.getPassword())
                        .withDefaultHeaders(compatibilityHeaders)    // this variant for imperative code
                        .build();

RestHighLevelClient = RestClients.create(clientConfiguration).rest();

Reference:- https://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/#elasticsearch.clients.rest

Sabab Ali Khan · Accepted Answer · 2023-06-26 16:51:04Z

Above will get issue related to SSL certificates. To configure SSL in configuration use the below code.

              @Bean
              @Override
              public RestHighLevelClient elasticsearchClient() {
              RestHighLevelClient client = null;
              try {
                  final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
                  credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("elastic", "fdfd65645thtyhu768"));
    
                  SSLContextBuilder sslBuilder = SSLContexts.custom().loadTrustMaterial(null, (x509Certificates, s) -> true);
                  final SSLContext sslContext = sslBuilder.build();
                  client = new RestHighLevelClient(RestClient.builder(new HttpHost("localhost", 9200, "https"))
                            .setHttpClientConfigCallback(new HttpClientConfigCallback() {
                                 @Override
                                 public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
                                      return httpClientBuilder.setSSLContext(sslContext)
                                               .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
                                               .setDefaultCredentialsProvider(credentialsProvider);
                                 }
                            }).setRequestConfigCallback(new RestClientBuilder.RequestConfigCallback() {
                                 @Override
                                 public RequestConfig.Builder customizeRequestConfig(
                                          RequestConfig.Builder requestConfigBuilder) {
                                      return requestConfigBuilder.setConnectTimeout(5000).setSocketTimeout(120000);
                                 }
                            }));
                   System.out.println("elasticsearch client created");
                  return client;
              } catch (Exception exp) {
                   System.out.println("Exception while client init {}", exp.getMessage());
              }
              return client;
         }

As it’s currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center.

Collectives™ on Stack Overflow

Getting Exceptions while running a Spring boot app with elasticsearch

3 Answers 3

8 Comments

Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

8 Comments

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related