# Graylog fails to connect to Opensearch on port 9200 **URL:** \ **Category:** Graylog Central (peer support)\ **Created:** [April 5, 2025, 12:48am UTC](https://community.graylog.org/t/graylog-fails-to-connect-to-opensearch-on-port-9200/35380 "2025-04-05T00:48:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![reckless](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/reckless/32/17810_2.png) [@reckless](https://community.graylog.org/u/reckless)\ **Post date:** [April 5, 2025, 12:48am UTC](https://community.graylog.org/t/graylog-fails-to-connect-to-opensearch-on-port-9200/35380/1 "2025-04-05T00:48:21Z")
Similar to this one: [Datanode not listening on 9200 - no opensearch](https://community.graylog.org/t/datanode-not-listening-on-9200-no-opensearch/34921) Except in my case I’m upgrading from Graylog 5.x to 6.x, and when I try to open the webbrowser, it simply fails to load. Running on Debian 12, LXC container. Graylog 5.2 worked fine for a very long time. The datanode log: > **/var/log/graylog-datanode/datanode.log** > > ```auto > 2025-04-04T18:46:08.864-05:00 INFO [ImmutableFeatureFlagsCollector] Following feature flags are used: {} > 2025-04-04T18:46:09.194-05:00 INFO [CmdLineTool] Running with JVM arguments: -Dlog4j.configurationFile=file:///etc/graylog/datanode/log4j2.xml -Xms2g -Xmx2g -XX:+UseG1GC -XX:-OmitStackTraceInFastThrow -XX:+UnlockExperimentalVMOptions -Djdk.tls.acknowledgeCloseNotify=true > 2025-04-04T18:46:09.349-05:00 INFO [client] MongoClient with metadata {"driver": {"name": "mongo-java-driver|legacy", "version": "5.2.0"}, "os": {"type": "Linux", "name": "Linux", "architecture": "amd64", "version": "6.8.12-9-pve"}, "platform": "Java/Eclipse Adoptium/17.0.14+7"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@a565cbd, com.mongodb.Jep395RecordCodecProvider@6fc29daa, com.mongodb.KotlinCodecProvider@2f66f0d0]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=1000, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=UNSPECIFIED, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null} > 2025-04-04T18:46:09.353-05:00 INFO [client] MongoClient with metadata {"driver": {"name": "mongo-java-driver", "version": "5.2.0"}, "os": {"type": "Linux", "name": "Linux", "architecture": "amd64", "version": "6.8.12-9-pve"}, "platform": "Java/Eclipse Adoptium/17.0.14+7"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@a565cbd, com.mongodb.Jep395RecordCodecProvider@6fc29daa, com.mongodb.KotlinCodecProvider@2f66f0d0]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=1000, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=UNSPECIFIED, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null} > 2025-04-04T18:46:09.366-05:00 INFO [cluster] Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, cryptd=false, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=21, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=15772835, minRoundTripTimeNanos=0} > 2025-04-04T18:46:09.425-05:00 INFO [MongoDBPreflightCheck] Connected to MongoDB version 7.0.18 > 2025-04-04T18:46:09.588-05:00 INFO [client] MongoClient with metadata {"driver": {"name": "mongo-java-driver|legacy", "version": "5.2.0"}, "os": {"type": "Linux", "name": "Linux", "architecture": "amd64", "version": "6.8.12-9-pve"}, "platform": "Java/Eclipse Adoptium/17.0.14+7"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@a565cbd, com.mongodb.Jep395RecordCodecProvider@6fc29daa, com.mongodb.KotlinCodecProvider@2f66f0d0]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=1000, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=UNSPECIFIED, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null} > 2025-04-04T18:46:09.588-05:00 INFO [cluster] Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, cryptd=false, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=21, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1099932, minRoundTripTimeNanos=0} > 2025-04-04T18:46:09.590-05:00 INFO [client] MongoClient with metadata {"driver": {"name": "mongo-java-driver", "version": "5.2.0"}, "os": {"type": "Linux", "name": "Linux", "architecture": "amd64", "version": "6.8.12-9-pve"}, "platform": "Java/Eclipse Adoptium/17.0.14+7"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@a565cbd, com.mongodb.Jep395RecordCodecProvider@6fc29daa, com.mongodb.KotlinCodecProvider@2f66f0d0]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=1000, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=UNSPECIFIED, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null} > 2025-04-04T18:46:09.616-05:00 INFO [DatanodeDirectories] Opensearch of the node 65745f4a-db8c-49a7-92ed-e4468e7e5b4a uses following directories as its storage: DatanodeDirectories{dataTargetDir='/var/lib/graylog-datanode/opensearch/data', logsTargetDir='/var/log/graylog-datanode/opensearch', configurationSourceDir='Optional[/etc/graylog/datanode]', configurationTargetDir='/var/lib/graylog-datanode/opensearch/config', opensearchProcessConfigurationDir='/var/lib/graylog-datanode/opensearch/config/opensearch'} > 2025-04-04T18:46:09.642-05:00 INFO [OpensearchConfigSync] Directory used for Opensearch process configuration is /var/lib/graylog-datanode/opensearch/config/opensearch > 2025-04-04T18:46:09.656-05:00 INFO [OpensearchConfigSync] Synchronizing Opensearch configuration > 2025-04-04T18:46:09.658-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/log4j2.properties > 2025-04-04T18:46:09.658-05:00 INFO [FullDirSync] Deleting obsolete directory /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-observability > 2025-04-04T18:46:09.668-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-observability/observability.yml > 2025-04-04T18:46:09.668-05:00 INFO [FullDirSync] Deleting obsolete directory /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security > 2025-04-04T18:46:09.670-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/roles.yml > 2025-04-04T18:46:09.670-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/audit.yml > 2025-04-04T18:46:09.671-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/whitelist.yml > 2025-04-04T18:46:09.671-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/opensearch.yml.example > 2025-04-04T18:46:09.671-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/tenants.yml > 2025-04-04T18:46:09.671-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/action_groups.yml > 2025-04-04T18:46:09.671-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/allowlist.yml > 2025-04-04T18:46:09.672-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/internal_users.yml > 2025-04-04T18:46:09.672-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/config.yml > 2025-04-04T18:46:09.672-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/roles_mapping.yml > 2025-04-04T18:46:09.672-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/nodes_dn.yml > 2025-04-04T18:46:09.673-05:00 INFO [FullDirSync] Deleting obsolete file /var/lib/graylog-datanode/opensearch/config/opensearch/jvm.options > 2025-04-04T18:46:09.675-05:00 INFO [FullDirSync] Synchronizing directory /var/lib/graylog-datanode/opensearch/config/opensearch > 2025-04-04T18:46:09.676-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/log4j2.properties > 2025-04-04T18:46:09.677-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/jvm.options > 2025-04-04T18:46:09.677-05:00 INFO [FullDirSync] Synchronizing directory /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-observability > 2025-04-04T18:46:09.678-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-observability/observability.yml > 2025-04-04T18:46:09.679-05:00 INFO [FullDirSync] Synchronizing directory /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security > 2025-04-04T18:46:09.679-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/whitelist.yml > 2025-04-04T18:46:09.680-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/opensearch.yml.example > 2025-04-04T18:46:09.680-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/allowlist.yml > 2025-04-04T18:46:09.681-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/roles_mapping.yml > 2025-04-04T18:46:09.681-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/internal_users.yml > 2025-04-04T18:46:09.682-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/action_groups.yml > 2025-04-04T18:46:09.683-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/audit.yml > 2025-04-04T18:46:09.683-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/config.yml > 2025-04-04T18:46:09.684-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/tenants.yml > 2025-04-04T18:46:09.685-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/nodes_dn.yml > 2025-04-04T18:46:09.685-05:00 INFO [FullDirSync] Synchronizing file /var/lib/graylog-datanode/opensearch/config/opensearch/opensearch-security/roles.yml > 2025-04-04T18:46:09.687-05:00 INFO [OpensearchDistributionProvider] Found following opensearch distributions: [/usr/share/graylog-datanode/dist/opensearch-2.15.0-linux-x64] > 2025-04-04T18:46:09.906-05:00 INFO [DatanodeDirectories] Opensearch of the node 65745f4a-db8c-49a7-92ed-e4468e7e5b4a uses following directories as its storage: DatanodeDirectories{dataTargetDir='/var/lib/graylog-datanode/opensearch/data', logsTargetDir='/var/log/graylog-datanode/opensearch', configurationSourceDir='Optional[/etc/graylog/datanode]', configurationTargetDir='/var/lib/graylog-datanode/opensearch/config', opensearchProcessConfigurationDir='/var/lib/graylog-datanode/opensearch/config/opensearch'} > 2025-04-04T18:46:10.879-05:00 INFO [DbEntitiesScanner] 16 entities have been scanned and added to DB Entity Catalog, it took 835.3 ms > 2025-04-04T18:46:10.921-05:00 INFO [ServerBootstrap] Graylog datanode 6.1.10+a308be3 starting up > 2025-04-04T18:46:10.922-05:00 INFO [ServerBootstrap] JRE: Eclipse Adoptium 17.0.14 on Linux 6.8.12-9-pve > 2025-04-04T18:46:10.922-05:00 INFO [ServerBootstrap] Deployment: deb > 2025-04-04T18:46:10.922-05:00 INFO [ServerBootstrap] OS: Debian GNU/Linux 12 (bookworm) (debian) > 2025-04-04T18:46:10.923-05:00 INFO [ServerBootstrap] Arch: amd64 > 2025-04-04T18:46:10.951-05:00 INFO [PeriodicalsService] Starting 6 periodicals ... > 2025-04-04T18:46:10.951-05:00 INFO [PeriodicalsService] Delaying start of 1 periodicals until this node becomes leader ... > 2025-04-04T18:46:10.952-05:00 INFO [Periodicals] Starting [org.graylog.datanode.bootstrap.preflight.DataNodeCertRenewalPeriodical] periodical in [0s], polling every [1800s]. > 2025-04-04T18:46:10.953-05:00 INFO [Periodicals] Starting [org.graylog.datanode.periodicals.OpensearchNodeHeartbeat] periodical in [0s], polling every [10s]. > 2025-04-04T18:46:11.024-05:00 INFO [Periodicals] Starting [org.graylog.datanode.periodicals.NodePingPeriodical] periodical in [0s], polling every [1s]. > 2025-04-04T18:46:11.024-05:00 INFO [Periodicals] Starting [org.graylog.datanode.bootstrap.preflight.DataNodeConfigurationPeriodical] periodical in [0s], polling every [2s]. > 2025-04-04T18:46:11.025-05:00 INFO [Periodicals] Starting [org.graylog.datanode.periodicals.MetricsCollector] periodical in [0s], polling every [60s]. > 2025-04-04T18:46:11.025-05:00 INFO [Periodicals] Starting [org.graylog2.events.ClusterEventPeriodical] periodical in [0s], polling every [1s]. > 2025-04-04T18:46:11.031-05:00 INFO [SearchableSnapshotsConfigurationBean] Opensearch snapshots not configured, skipping search role and cache configuration. > 2025-04-04T18:46:11.033-05:00 INFO [OpensearchDistributionProvider] Found following opensearch distributions: [/usr/share/graylog-datanode/dist/opensearch-2.15.0-linux-x64] > 2025-04-04T18:46:11.035-05:00 INFO [OpensearchProcessService] > > ======================================================================================================== > It seems you are starting Data node for the first time. The current configuration is not sufficient to > start the indexer process because a security configuration is missing. You have to either provide http > and transport SSL certificates or use the Graylog preflight interface to configure this Data node remotely. > ======================================================================================================== > > 2025-04-04T18:46:11.036-05:00 INFO [JerseyService] Starting Data node REST API > 2025-04-04T18:46:11.036-05:00 INFO [ServerBootstrap] Services started, startup times in ms: {GracefulShutdownService [RUNNING]=0, OpensearchProcessService [RUNNING]=0, PeriodicalsService [RUNNING]=76, OpensearchConfigurationService [RUNNING]=83} > 2025-04-04T18:46:11.037-05:00 INFO [ServerBootstrap] Graylog DataNode datanode up and running. > 2025-04-04T18:46:11.381-05:00 INFO [Version] HV000001: Hibernate Validator 8.0.1.Final > 2025-04-04T18:46:11.560-05:00 INFO [NetworkListener] Started listener bound to [0.0.0.0:8999] > 2025-04-04T18:46:11.561-05:00 INFO [HttpServer] [HttpServer] Started. > 2025-04-04T18:46:11.562-05:00 INFO [JerseyService] Started REST API at <0.0.0.0:8999> > > ``` The server.log post is posted in the next reply in this thread. I know it says in the datanode.log: > _You have to either provide http and transport SSL certificates or use the Graylog preflight interface to configure this Data node remotely._ I’d go through the preflight website GUI but it won’t even load (browser saying it’s unable to connect) How do I get it working again? ---
**Author:** ![reckless](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/reckless/32/17810_2.png) [@reckless](https://community.graylog.org/u/reckless)\ **Post date:** [April 5, 2025, 12:49am UTC](https://community.graylog.org/t/graylog-fails-to-connect-to-opensearch-on-port-9200/35380/2 "2025-04-05T00:49:13Z")
And this is server log: > **/var/log/graylog-server/server.log** > > ```auto > 2025-04-04T18:46:08.700-05:00 INFO [ImmutableFeatureFlagsCollector] Following feature flags are used: {default properties file=[cloud_inputs=on, investigation_report_by_ai=on, data_tiering_cloud=off, composable_index_templates=off, preflight_web=on, data_node_migration=on, remote_reindex_migration=off, instant_archiving=off, configurable_value_units=on, new_report_creation=on, threat_coverage=on]} > 2025-04-04T18:46:09.076-05:00 INFO [CmdLineTool] Loaded plugin: AWS plugins 6.1.10+a308be3 [org.graylog.aws.AWSPlugin] > 2025-04-04T18:46:09.077-05:00 INFO [CmdLineTool] Loaded plugin: Integrations 6.1.10+a308be3 [org.graylog.integrations.IntegrationsPlugin] > 2025-04-04T18:46:09.077-05:00 INFO [CmdLineTool] Loaded plugin: Threat Intelligence Plugin 6.1.10+a308be3 [org.graylog.plugins.threatintel.ThreatIntelPlugin] > 2025-04-04T18:46:09.078-05:00 INFO [CmdLineTool] Loaded plugin: Elasticsearch 7 Support 6.1.10+a308be3 [org.graylog.storage.elasticsearch7.Elasticsearch7Plugin] > 2025-04-04T18:46:09.078-05:00 INFO [CmdLineTool] Loaded plugin: OpenSearch 2 Support 6.1.10+a308be3 [org.graylog.storage.opensearch2.OpenSearch2Plugin] > 2025-04-04T18:46:09.090-05:00 INFO [CmdLineTool] Running with JVM arguments: -Xms2g -Xmx2g -XX:+UseG1GC -XX:-OmitStackTraceInFastThrow -Djdk.tls.acknowledgeCloseNotify=true -Dlog4j2.formatMsgNoLookups=true -Dlog4j.configurationFile=file:///etc/graylog/server/log4j2.xml -Dgraylog2.installation_source=deb > 2025-04-04T18:46:09.213-05:00 INFO [client] MongoClient with metadata {"driver": {"name": "mongo-java-driver|legacy", "version": "5.2.0"}, "os": {"type": "Linux", "name": "Linux", "architecture": "amd64", "version": "6.8.12-9-pve"}, "platform": "Java/Eclipse Adoptium/17.0.14+7"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@59dc36d4, com.mongodb.Jep395RecordCodecProvider@12fcc71f, com.mongodb.KotlinCodecProvider@5679e96b]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=1000, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=UNSPECIFIED, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null} > 2025-04-04T18:46:09.216-05:00 INFO [client] MongoClient with metadata {"driver": {"name": "mongo-java-driver", "version": "5.2.0"}, "os": {"type": "Linux", "name": "Linux", "architecture": "amd64", "version": "6.8.12-9-pve"}, "platform": "Java/Eclipse Adoptium/17.0.14+7"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@59dc36d4, com.mongodb.Jep395RecordCodecProvider@12fcc71f, com.mongodb.KotlinCodecProvider@5679e96b]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=1000, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=UNSPECIFIED, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null} > 2025-04-04T18:46:09.233-05:00 INFO [cluster] Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, cryptd=false, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=21, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=16187996, minRoundTripTimeNanos=0} > 2025-04-04T18:46:09.294-05:00 INFO [MongoDBPreflightCheck] Connected to MongoDB version 7.0.18 > 2025-04-04T18:46:11.143-05:00 INFO [client] MongoClient with metadata {"driver": {"name": "mongo-java-driver|legacy", "version": "5.2.0"}, "os": {"type": "Linux", "name": "Linux", "architecture": "amd64", "version": "6.8.12-9-pve"}, "platform": "Java/Eclipse Adoptium/17.0.14+7"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@59dc36d4, com.mongodb.Jep395RecordCodecProvider@12fcc71f, com.mongodb.KotlinCodecProvider@5679e96b]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=1000, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=UNSPECIFIED, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null} > 2025-04-04T18:46:11.144-05:00 INFO [client] MongoClient with metadata {"driver": {"name": "mongo-java-driver", "version": "5.2.0"}, "os": {"type": "Linux", "name": "Linux", "architecture": "amd64", "version": "6.8.12-9-pve"}, "platform": "Java/Eclipse Adoptium/17.0.14+7"} created with settings MongoClientSettings{readPreference=primary, writeConcern=WriteConcern{w=null, wTimeout=null ms, journal=null}, retryWrites=true, retryReads=true, readConcern=ReadConcern{level=null}, credential=null, transportSettings=null, commandListeners=[], codecRegistry=ProvidersCodecRegistry{codecProviders=[ValueCodecProvider{}, BsonValueCodecProvider{}, DBRefCodecProvider{}, DBObjectCodecProvider{}, DocumentCodecProvider{}, CollectionCodecProvider{}, IterableCodecProvider{}, MapCodecProvider{}, GeoJsonCodecProvider{}, GridFSFileCodecProvider{}, Jsr310CodecProvider{}, JsonObjectCodecProvider{}, BsonCodecProvider{}, EnumCodecProvider{}, com.mongodb.client.model.mql.ExpressionCodecProvider@59dc36d4, com.mongodb.Jep395RecordCodecProvider@12fcc71f, com.mongodb.KotlinCodecProvider@5679e96b]}, loggerSettings=LoggerSettings{maxDocumentLength=1000}, clusterSettings={hosts=[localhost:27017], srvServiceName=mongodb, mode=SINGLE, requiredClusterType=UNKNOWN, requiredReplicaSetName='null', serverSelector='null', clusterListeners='[]', serverSelectionTimeout='30000 ms', localThreshold='15 ms'}, socketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=0, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, heartbeatSocketSettings=SocketSettings{connectTimeoutMS=10000, readTimeoutMS=10000, receiveBufferSize=0, proxySettings=ProxySettings{host=null, port=null, username=null, password=null}}, connectionPoolSettings=ConnectionPoolSettings{maxSize=1000, minSize=0, maxWaitTimeMS=120000, maxConnectionLifeTimeMS=0, maxConnectionIdleTimeMS=0, maintenanceInitialDelayMS=0, maintenanceFrequencyMS=60000, connectionPoolListeners=[], maxConnecting=2}, serverSettings=ServerSettings{heartbeatFrequencyMS=10000, minHeartbeatFrequencyMS=500, serverMonitoringMode=AUTO, serverListeners='[]', serverMonitorListeners='[]'}, sslSettings=SslSettings{enabled=false, invalidHostNameAllowed=false, context=null}, applicationName='null', compressorList=[], uuidRepresentation=UNSPECIFIED, serverApi=null, autoEncryptionSettings=null, dnsClient=null, inetAddressResolver=null, contextProvider=null, timeoutMS=null} > 2025-04-04T18:46:11.147-05:00 INFO [cluster] Waiting for server to become available for operation with ID 11. Remaining time: 29998 ms. Selector: ReadPreferenceServerSelector{readPreference=primary}, topology description: {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING}]. > 2025-04-04T18:46:11.163-05:00 INFO [cluster] Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, cryptd=false, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=21, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=21039597, minRoundTripTimeNanos=0} > 2025-04-04T18:46:11.263-05:00 INFO [IndexerDiscoveryProvider] No indexer hosts configured, using fallback http://127.0.0.1:9200 > 2025-04-04T18:46:11.471-05:00 INFO [ServerBootstrap] Running 2 migrations... > 2025-04-04T18:46:12.930-05:00 INFO [IndexerDiscoveryProvider] No indexer hosts configured, using fallback http://127.0.0.1:9200 > 2025-04-04T18:46:12.988-05:00 ERROR [VersionProbe] Unable to retrieve version from indexer node: Failed to connect to /127.0.0.1:9200. - Connection refused. > 2025-04-04T18:46:12.989-05:00 INFO [VersionProbe] Indexer is not available. Retry #1 > 2025-04-04T18:46:17.990-05:00 ERROR [VersionProbe] Unable to retrieve version from indexer node: Failed to connect to /127.0.0.1:9200. - Connection refused. > 2025-04-04T18:46:17.991-05:00 INFO [VersionProbe] Indexer is not available. Retry #2 > > ``` Only posting in this comment since it couldn’t fit in the original post for some reason. ---
**Author:** ![BusRider](https://avatars.discourse-cdn.com/v4/letter/b/a3d4f5/32.png) [@BusRider](https://community.graylog.org/u/BusRider)\ **Post date:** [June 17, 2025, 3:02pm UTC](https://community.graylog.org/t/graylog-fails-to-connect-to-opensearch-on-port-9200/35380/3 "2025-06-17T15:02:54Z")
Did you ever figure your problem out with this? I’m having the same issue between DataNode stuck at preflight prompt and Graylog not wanting to load.