# Intermittent failure to load the WebUI after upgrade

**URL:** <https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761>\
**Category:** Graylog Central (peer support)\
**Created:** [November 15, 2021, 7:11pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761 "2021-11-15T19:11:55Z")\
**Posts on this page:** 11\
**Page:** 1

<div class="post-metadata">

**Author:** ![kaaroten](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/kaaroten/32/5113_2.png) [@kaaroten](https://community.graylog.org/u/kaaroten)\
**Post date:** [November 15, 2021, 7:11pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/1 "2021-11-15T19:11:55Z")

</div>

Hi,  
This issue has had me pondering for a while now, because I can’t figure out how it happens intermittently but not in a regular way. It just happens at random.  
While the server’s activities seem untouched, I have problems predicting whether the UI will be working or not when I connect.

## The Issue

After upgrading `graylog-server` from the version 4.0.5 to the version 4.2.1 (same issue with the version 4.2.0) I found out that upon restarting the server it worked seamlessly, but for a certain period of time, then the WebUI becomes inaccessible and a blank page presents itself instead.

The blank page contains all the scripts, but no other `<body>` components:

 ![page-source-code](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/2X/7/7bd9d2835f3a310128806bfb015ed6bda4da255a.png)

Unfortunately this status remains for hours.

When the WebUI works as intended, no errors are thrown from the browser console. When it shows the blank page it throws a bunch of javascript errors for every installed plugin:

> **javascript errors on console**
>
> ![web-errors-2](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/2X/b/bb7fad05ef6dd0cf3e081ef2aed9ff78e0585e80.png)

> **collapsed errors**
>
> ![web-errors](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/2X/c/c4b1ff9a73fb4432af20bb1f21d6b641ae6efbee.png)

I really can’t figure the source of this issue out, because, as I said, sometimes it works, sometimes it doesn’t.

## Environmental information

> **server.conf**
>
> ```auto
> is_master = true
> node_id_file = /etc/graylog/server/node-id
> password_secret = <private>
> root_username = admin
> root_password_sha2 = <private>
> root_timezone = Europe/Rome
> 
> bin_dir = /usr/share/graylog-server/bin
> data_dir = /var/lib/graylog-server
> plugin_dir = /usr/share/graylog-server/plugin
> 
> http_bind_address = 192.168.37.45:9000
> http_publish_uri = http://192.168.37.45:9000/
> 
> http_enable_cors = true
> http_enable_gzip = true
> http_max_header_size = 8192
> http_thread_pool_size = 16
> trusted_proxies = 127.0.0.1/32, 0:0:0:0:0:0:0:1/128
> 
> rotation_strategy = count
> elasticsearch_max_docs_per_index = 20000000
> elasticsearch_max_number_of_indices = 20
> retention_strategy = delete
> elasticsearch_shards = 4
> elasticsearch_replicas = 0
> elasticsearch_index_prefix = graylog
> allow_leading_wildcard_searches = true
> allow_highlighting = false
> elasticsearch_analyzer = standard
> 
> output_batch_size = 500
> output_flush_interval = 1
> output_fault_count_threshold = 5
> output_fault_penalty_seconds = 30
> processbuffer_processors = 5
> outputbuffer_processors = 3
> processor_wait_strategy = blocking
> ring_size = 65536
> inputbuffer_ring_size = 65536
> inputbuffer_processors = 2
> inputbuffer_wait_strategy = blocking
> message_journal_enabled = true
> message_journal_dir = /var/lib/graylog-server/journal
> lb_recognition_period_seconds = 3
> 
> mongodb_uri = mongodb://localhost/graylog
> mongodb_max_connections = 1000
> mongodb_threads_allowed_to_block_multiplier = 5
> 
> proxied_requests_thread_pool_size = 32
> enabled_tls_protocols= TLSv1.1,TLSv1.2,TLSv1.3
> auditlog_log4j_enabled = true
> auditlog_log4j_logger_name = graylog-auditlog
> 
> ```

> **server.log (from the last reboot)**
>
> ```auto
> 2021-11-15T01:04:34.539+01:00 INFO [ImmutableFeatureFlagsCollector] Following feature flags are used: {}
> 2021-11-15T01:04:41.704+01:00 INFO [CmdLineTool] Loaded plugin: TelegramNotification 2.3.6 [de.irgendwr.TelegramNotificationPlugin]
> 2021-11-15T01:04:41.709+01:00 INFO [CmdLineTool] Loaded plugin: AWS plugins 4.2.1 [org.graylog.aws.AWSPlugin]
> 2021-11-15T01:04:41.714+01:00 INFO [CmdLineTool] Loaded plugin: Enterprise Integrations 4.2.1 [org.graylog.enterprise.integrations.EnterpriseIntegrationsPlugin]
> 2021-11-15T01:04:41.723+01:00 INFO [CmdLineTool] Loaded plugin: Integrations 4.2.1 [org.graylog.integrations.IntegrationsPlugin]
> 2021-11-15T01:04:41.728+01:00 INFO [CmdLineTool] Loaded plugin: Collector 4.2.1 [org.graylog.plugins.collector.CollectorPlugin]
> 2021-11-15T01:04:41.732+01:00 INFO [CmdLineTool] Loaded plugin: Graylog Enterprise 4.2.1 [org.graylog.plugins.enterprise.EnterprisePlugin]
> 2021-11-15T01:04:41.737+01:00 INFO [CmdLineTool] Loaded plugin: Graylog Enterprise (ES6 Support) 4.2.1 [org.graylog.plugins.enterprise.org.graylog.plugins.enterprise.es6.EnterpriseES6Plugin]
> 2021-11-15T01:04:41.741+01:00 INFO [CmdLineTool] Loaded plugin: Graylog Enterprise (ES7 Support) 4.2.1 [org.graylog.plugins.enterprise.org.graylog.plugins.enterprise.es7.EnterpriseES7Plugin]
> 2021-11-15T01:04:41.746+01:00 INFO [CmdLineTool] Loaded plugin: Threat Intelligence Plugin 4.2.1 [org.graylog.plugins.threatintel.ThreatIntelPlugin]
> 2021-11-15T01:04:41.755+01:00 INFO [CmdLineTool] Loaded plugin: Elasticsearch 6 Support 4.2.1+5442e44 [org.graylog.storage.elasticsearch6.Elasticsearch6Plugin]
> 2021-11-15T01:04:41.761+01:00 INFO [CmdLineTool] Loaded plugin: Elasticsearch 7 Support 4.2.1+5442e44 [org.graylog.storage.elasticsearch7.Elasticsearch7Plugin]
> 2021-11-15T01:04:42.211+01:00 INFO [CmdLineTool] Running with JVM arguments: -Xms1g -Xmx1g -XX:NewRatio=1 -XX:+ResizeTLAB -XX:-OmitStackTraceInFastThrow -Djdk.tls.acknowledgeCloseNotify=true -XX:+UseConcMarkSweepGC -XX:+CMSConcurrentMTEnabled -XX:+CMSClassUnloadingEnabled -Dlog4j.configurationFile=file:///etc/graylog/server/log4j2.xml -Djava.library.path=/usr/share/graylog-server/lib/sigar -Dgraylog2.installation_source=deb
> 2021-11-15T01:04:43.434+01:00 INFO [Version] HV000001: Hibernate Validator null
> 2021-11-15T01:05:13.163+01:00 INFO [InputBufferImpl] Message journal is enabled.
> 2021-11-15T01:05:13.276+01:00 INFO [NodeId] Node ID: 2f4965ee-d80f-4b81-beca-4aa4bb66bb37
> 2021-11-15T01:05:15.140+01:00 INFO [LogManager] Loading logs.
> 2021-11-15T01:05:15.327+01:00 WARN [Log] Found a corrupted index file, /var/lib/graylog-server/journal/messagejournal-0/00000000000207983642.index, deleting and rebuilding index...
> 2021-11-15T01:05:17.336+01:00 INFO [LogManager] Logs loading complete.
> 2021-11-15T01:05:17.349+01:00 INFO [LocalKafkaJournal] Initialized Kafka based journal at /var/lib/graylog-server/journal
> 2021-11-15T01:05:17.572+01:00 INFO [cluster] Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=5000}
> 2021-11-15T01:05:17.834+01:00 INFO [cluster] Cluster description not yet available. Waiting for 30000 ms before timing out
> 2021-11-15T01:05:17.972+01:00 INFO [connection] Opened connection [connectionId{localValue:1, serverValue:1}] to localhost:27017
> 2021-11-15T01:05:17.998+01:00 INFO [cluster] Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 2, 17]}, minWireVersion=0, maxWireVersion=8, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=16926797}
> 2021-11-15T01:05:18.104+01:00 INFO [connection] Opened connection [connectionId{localValue:2, serverValue:2}] to localhost:27017
> 2021-11-15T01:05:19.405+01:00 INFO [InputBufferImpl] Initialized InputBufferImpl with ring size <65536> and wait strategy <BlockingWaitStrategy>, running 2 parallel message handlers.
> 2021-11-15T01:05:20.548+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).
> 2021-11-15T01:05:25.561+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).
> 2021-11-15T01:05:30.568+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).
> 2021-11-15T01:05:35.573+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).
> 2021-11-15T01:05:40.579+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).
> 2021-11-15T01:05:46.342+01:00 INFO [ElasticsearchVersionProvider] Elasticsearch cluster is running v7.10.2
> 2021-11-15T01:05:52.273+01:00 INFO [connection] Opened connection [connectionId{localValue:3, serverValue:3}] to localhost:27017
> 2021-11-15T01:05:55.392+01:00 INFO [ProcessBuffer] Initialized ProcessBuffer with ring size <65536> and wait strategy <BlockingWaitStrategy>.
> 2021-11-15T01:05:59.323+01:00 WARN [GeoIpResolverEngine] GeoIP database file does not exist: /etc/graylog/server/GeoLite2-City.mmdb
> 2021-11-15T01:05:59.424+01:00 INFO [OutputBuffer] Initialized OutputBuffer with ring size <65536> and wait strategy <BlockingWaitStrategy>.
> 2021-11-15T01:06:00.316+01:00 WARN [GeoIpResolverEngine] GeoIP database file does not exist: /etc/graylog/server/GeoLite2-City.mmdb
> 2021-11-15T01:06:00.990+01:00 WARN [GeoIpResolverEngine] GeoIP database file does not exist: /etc/graylog/server/GeoLite2-City.mmdb
> 2021-11-15T01:06:01.528+01:00 WARN [GeoIpResolverEngine] GeoIP database file does not exist: /etc/graylog/server/GeoLite2-City.mmdb
> 2021-11-15T01:06:01.921+01:00 WARN [GeoIpResolverEngine] GeoIP database file does not exist: /etc/graylog/server/GeoLite2-City.mmdb
> 2021-11-15T01:06:07.179+01:00 INFO [graylog-auditlog] urn:graylog:node:2f4965ee-d80f-4b81-beca-4aa4bb66bb37 node startup on 2f4965ee-d80f-4b81-beca-4aa4bb66bb37 initiated - Graylog v4.2.1+5442e44
> 2021-11-15T01:06:07.296+01:00 INFO [ServerBootstrap] Graylog server 4.2.1+5442e44 starting up
> 2021-11-15T01:06:07.297+01:00 INFO [ServerBootstrap] JRE: Debian 11.0.12 on Linux 4.19.0-18-amd64
> 2021-11-15T01:06:07.298+01:00 INFO [ServerBootstrap] Deployment: deb
> 2021-11-15T01:06:07.299+01:00 INFO [ServerBootstrap] OS: Debian GNU/Linux 10 (buster) (debian)
> 2021-11-15T01:06:07.300+01:00 INFO [ServerBootstrap] Arch: amd64
> 2021-11-15T01:06:07.547+01:00 INFO [PeriodicalsService] Starting 37 periodicals ...
> 2021-11-15T01:06:07.549+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.ThroughputCalculator] periodical in [0s], polling every [1s].
> 2021-11-15T01:06:07.637+01:00 INFO [Periodicals] Starting [org.graylog.plugins.pipelineprocessor.periodical.LegacyDefaultStreamMigration] periodical, running forever.
> 2021-11-15T01:06:07.676+01:00 INFO [PeriodicalsService] Not starting [org.graylog2.periodical.AlertScannerThread] periodical. Not configured to run on this node.
> 2021-11-15T01:06:07.678+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.BatchedElasticSearchOutputFlushThread] periodical in [0s], polling every [1s].
> 2021-11-15T01:06:07.680+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.ClusterHealthCheckThread] periodical in [120s], polling every [20s].
> 2021-11-15T01:06:07.724+01:00 INFO [PeriodicalsService] Not starting [org.graylog2.periodical.ContentPackLoaderPeriodical] periodical. Not configured to run on this node.
> 2021-11-15T01:06:07.725+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.GarbageCollectionWarningThread] periodical, running forever.
> 2021-11-15T01:06:07.729+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.IndexerClusterCheckerThread] periodical in [0s], polling every [30s].
> 2021-11-15T01:06:07.757+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.IndexRetentionThread] periodical in [0s], polling every [300s].
> 2021-11-15T01:06:07.782+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.IndexRotationThread] periodical in [0s], polling every [10s].
> 2021-11-15T01:06:07.788+01:00 INFO [LegacyDefaultStreamMigration] Legacy default stream has no connections, no migration needed.
> 2021-11-15T01:06:07.843+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.NodePingThread] periodical in [0s], polling every [1s].
> 2021-11-15T01:06:07.845+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.VersionCheckThread] periodical in [300s], polling every [1800s].
> 2021-11-15T01:06:07.863+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.ThrottleStateUpdaterThread] periodical in [1s], polling every [1s].
> 2021-11-15T01:06:07.870+01:00 INFO [Periodicals] Starting [org.graylog2.events.ClusterEventPeriodical] periodical in [0s], polling every [1s].
> 2021-11-15T01:06:07.873+01:00 INFO [Periodicals] Starting [org.graylog2.events.ClusterEventCleanupPeriodical] periodical in [0s], polling every [86400s].
> 2021-11-15T01:06:07.875+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.ClusterIdGeneratorPeriodical] periodical, running forever.
> 2021-11-15T01:06:07.880+01:00 INFO [connection] Opened connection [connectionId{localValue:4, serverValue:4}] to localhost:27017
> 2021-11-15T01:06:07.895+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.IndexRangesMigrationPeriodical] periodical, running forever.
> 2021-11-15T01:06:07.911+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.IndexRangesCleanupPeriodical] periodical in [15s], polling every [3600s].
> 2021-11-15T01:06:07.958+01:00 INFO [connection] Opened connection [connectionId{localValue:5, serverValue:5}] to localhost:27017
> 2021-11-15T01:06:08.030+01:00 INFO [connection] Opened connection [connectionId{localValue:7, serverValue:7}] to localhost:27017
> 2021-11-15T01:06:08.051+01:00 INFO [connection] Opened connection [connectionId{localValue:9, serverValue:9}] to localhost:27017
> 2021-11-15T01:06:08.020+01:00 INFO [connection] Opened connection [connectionId{localValue:6, serverValue:6}] to localhost:27017
> 2021-11-15T01:06:08.083+01:00 INFO [connection] Opened connection [connectionId{localValue:8, serverValue:8}] to localhost:27017
> 2021-11-15T01:06:08.279+01:00 INFO [PeriodicalsService] Not starting [org.graylog2.periodical.UserPermissionMigrationPeriodical] periodical. Not configured to run on this node.
> 2021-11-15T01:06:08.280+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.ConfigurationManagementPeriodical] periodical, running forever.
> 2021-11-15T01:06:08.305+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.TrafficCounterCalculator] periodical in [0s], polling every [1s].
> 2021-11-15T01:06:08.307+01:00 INFO [Periodicals] Starting [org.graylog2.indexer.fieldtypes.IndexFieldTypePollerPeriodical] periodical in [0s], polling every [3600s].
> 2021-11-15T01:06:08.308+01:00 INFO [Periodicals] Starting [org.graylog.scheduler.periodicals.ScheduleTriggerCleanUp] periodical in [120s], polling every [86400s].
> 2021-11-15T01:06:08.309+01:00 INFO [Periodicals] Starting [org.graylog2.periodical.ESVersionCheckPeriodical] periodical in [0s], polling every [30s].
> 2021-11-15T01:06:08.310+01:00 INFO [Periodicals] Starting [org.graylog.plugins.sidecar.periodical.PurgeExpiredSidecarsThread] periodical in [0s], polling every [600s].
> 2021-11-15T01:06:08.310+01:00 INFO [Periodicals] Starting [org.graylog.plugins.sidecar.periodical.PurgeExpiredConfigurationUploads] periodical in [0s], polling every [600s].
> 2021-11-15T01:06:08.366+01:00 INFO [Periodicals] Starting [org.graylog.plugins.views.search.db.SearchesCleanUpJob] periodical in [3600s], polling every [28800s].
> 2021-11-15T01:06:08.477+01:00 INFO [Periodicals] Starting [org.graylog.events.periodicals.EventNotificationStatusCleanUp] periodical in [120s], polling every [86400s].
> 2021-11-15T01:06:08.478+01:00 INFO [Periodicals] Starting [org.graylog.plugins.collector.periodical.PurgeExpiredCollectorsThread] periodical in [0s], polling every [3600s].
> 2021-11-15T01:06:08.479+01:00 INFO [Periodicals] Starting [org.graylog.plugins.forwarder.ForwarderStatePeriodical] periodical in [0s], polling every [15s].
> 2021-11-15T01:06:08.498+01:00 INFO [Periodicals] Starting [org.graylog.plugins.license.LicenseManagerPeriodical] periodical in [0s], polling every [300s].
> 2021-11-15T01:06:08.538+01:00 INFO [Periodicals] Starting [org.graylog.plugins.license.LicenseReportPeriodical] periodical in [300s], polling every [3600s].
> 2021-11-15T01:06:08.563+01:00 INFO [Periodicals] Starting [org.graylog.plugins.license.StagedLicenseInstallerPeriodical] periodical, running forever.
> 2021-11-15T01:06:08.620+01:00 INFO [Periodicals] Starting [org.graylog.plugins.auditlog.mongodb.MongoAuditLogPeriodical] periodical in [0s], polling every [3600s].
> 2021-11-15T01:06:08.667+01:00 INFO [Periodicals] Starting [org.graylog.plugins.report.scheduler.ReportPeriodical] periodical in [120s], polling every [60s].
> 2021-11-15T01:06:08.673+01:00 INFO [Periodicals] Starting [org.graylog.plugins.report.service.ChromeDriverCleanupPeriodical] periodical in [60s], polling every [180s].
> 2021-11-15T01:06:08.786+01:00 INFO [LookupTableService] Data Adapter watchlist-mongo/61901db34d93d945cb9a70a0 [@5d635da0] STARTING
> 2021-11-15T01:06:08.789+01:00 INFO [Periodicals] Starting [org.graylog.plugins.files.CleanupPeriodical] periodical in [0s], polling every [86400s].
> 2021-11-15T01:06:08.795+01:00 INFO [LookupTableService] Data Adapter mac-ssid/602961387b867f0b9b165257 [@5ca767bd] STARTING
> 2021-11-15T01:06:08.796+01:00 INFO [LookupTableService] Data Adapter network-aliases/5fc41b5adec571151748b6b4 [@4da9aba0] STARTING
> 2021-11-15T01:06:09.795+01:00 INFO [LookupTableService] Data Adapter ssids/5fbaadc2588a9a48ea9db9b9 [@4a925457] STARTING
> 2021-11-15T01:06:09.798+01:00 INFO [LookupTableService] Data Adapter interface-names/5fc421bddec571151748be22 [@13a39d43] STARTING
> 2021-11-15T01:06:09.803+01:00 INFO [LookupTableService] Data Adapter subnets/5fbad765588a9a48ea9dea63 [@154175b3] STARTING
> 2021-11-15T01:06:09.813+01:00 INFO [LookupTableService] Data Adapter mac-address/5fbab426588a9a48ea9dc2bd [@7816fbb9] STARTING
> 2021-11-15T01:06:09.846+01:00 INFO [LookupTableService] Data Adapter watchlist-mongo/61901db34d93d945cb9a70a0 [@5d635da0] RUNNING
> 2021-11-15T01:06:09.878+01:00 INFO [LookupTableService] Data Adapter ssids/5fbaadc2588a9a48ea9db9b9 [@4a925457] RUNNING
> 2021-11-15T01:06:09.880+01:00 INFO [LookupDataAdapterRefreshService] Adding job for <ssids/5fbaadc2588a9a48ea9db9b9/@4a925457> [interval=60000ms]
> 2021-11-15T01:06:09.902+01:00 INFO [LookupTableService] Data Adapter interface-names/5fc421bddec571151748be22 [@13a39d43] RUNNING
> 2021-11-15T01:06:09.904+01:00 INFO [LookupTableService] Data Adapter mac-ssid/602961387b867f0b9b165257 [@5ca767bd] RUNNING
> 2021-11-15T01:06:09.930+01:00 INFO [LookupDataAdapterRefreshService] Adding job for <mac-ssid/602961387b867f0b9b165257/@5ca767bd> [interval=60000ms]
> 2021-11-15T01:06:09.932+01:00 INFO [LookupDataAdapterRefreshService] Adding job for <interface-names/5fc421bddec571151748be22/@13a39d43> [interval=60000ms]
> 2021-11-15T01:06:09.971+01:00 INFO [LookupTableService] Data Adapter mac-address/5fbab426588a9a48ea9dc2bd [@7816fbb9] RUNNING
> 2021-11-15T01:06:09.972+01:00 INFO [LookupDataAdapterRefreshService] Adding job for <mac-address/5fbab426588a9a48ea9dc2bd/@7816fbb9> [interval=60000ms]
> 2021-11-15T01:06:10.091+01:00 INFO [LookupTableService] Data Adapter subnets/5fbad765588a9a48ea9dea63 [@154175b3] RUNNING
> 2021-11-15T01:06:10.092+01:00 INFO [LookupDataAdapterRefreshService] Adding job for <subnets/5fbad765588a9a48ea9dea63/@154175b3> [interval=60000ms]
> 2021-11-15T01:06:10.463+01:00 INFO [LookupTableService] Data Adapter network-aliases/5fc41b5adec571151748b6b4 [@4da9aba0] RUNNING
> 2021-11-15T01:06:10.464+01:00 INFO [LookupDataAdapterRefreshService] Adding job for <network-aliases/5fc41b5adec571151748b6b4/@4da9aba0> [interval=60000ms]
> 2021-11-15T01:06:10.849+01:00 INFO [LookupTableService] Cache watchlist-cache/61901db34d93d945cb9a709e [@75f361e3] STARTING
> 2021-11-15T01:06:10.856+01:00 INFO [LookupTableService] Cache watchlist-cache/61901db34d93d945cb9a709e [@75f361e3] RUNNING
> 2021-11-15T01:06:10.851+01:00 INFO [LookupTableService] Cache no-cache/5fbaae33588a9a48ea9dba3e [@1f55441c] STARTING
> 2021-11-15T01:06:10.873+01:00 INFO [LookupTableService] Cache no-cache/5fbaae33588a9a48ea9dba3e [@1f55441c] RUNNING
> 2021-11-15T01:06:10.926+01:00 INFO [LookupTableService] Starting lookup table SSIDs lookup/5fbaae4b588a9a48ea9dba5b [@4f131e29] using cache no-cache/5fbaae33588a9a48ea9dba3e [@1f55441c], data adapter ssids/5fbaadc2588a9a48ea9db9b9 [@4a925457]
> 2021-11-15T01:06:10.927+01:00 INFO [LookupTableService] Starting lookup table MAC Address/5fbab464588a9a48ea9dc304 [@7a4f0950] using cache no-cache/5fbaae33588a9a48ea9dba3e [@1f55441c], data adapter mac-address/5fbab426588a9a48ea9dc2bd [@7816fbb9]
> 2021-11-15T01:06:10.928+01:00 INFO [LookupTableService] Starting lookup table Subnet Lookup/5fbad792588a9a48ea9dea97 [@56d7bbaa] using cache no-cache/5fbaae33588a9a48ea9dba3e [@1f55441c], data adapter subnets/5fbad765588a9a48ea9dea63 [@154175b3]
> 2021-11-15T01:06:10.930+01:00 INFO [LookupTableService] Starting lookup table Net Alias Lookup/5fc41bc0dec571151748b725 [@3a4e207] using cache no-cache/5fbaae33588a9a48ea9dba3e [@1f55441c], data adapter network-aliases/5fc41b5adec571151748b6b4 [@4da9aba0]
> 2021-11-15T01:06:10.931+01:00 INFO [LookupTableService] Starting lookup table Interface Names Lookup/5fc421f3dec571151748be61 [@5491560c] using cache no-cache/5fbaae33588a9a48ea9dba3e [@1f55441c], data adapter interface-names/5fc421bddec571151748be22 [@13a39d43]
> 2021-11-15T01:06:10.940+01:00 INFO [LookupTableService] Starting lookup table MAC-SSID/602961b87b867f0b9b1652e3 [@5616c047] using cache no-cache/5fbaae33588a9a48ea9dba3e [@1f55441c], data adapter mac-ssid/602961387b867f0b9b165257 [@5ca767bd]
> 2021-11-15T01:06:10.942+01:00 INFO [LookupTableService] Starting lookup table watchlist/61901db34d93d945cb9a70a2 [@3df72bc4] using cache watchlist-cache/61901db34d93d945cb9a709e [@75f361e3], data adapter watchlist-mongo/61901db34d93d945cb9a70a0 [@5d635da0]
> 2021-11-15T01:06:12.140+01:00 INFO [IndexRetentionThread] Elasticsearch cluster not available, skipping index retention checks.
> 2021-11-15T01:06:15.571+01:00 INFO [JerseyService] Enabling CORS for HTTP endpoint
> 2021-11-15T01:06:23.281+01:00 INFO [IndexRangesCleanupPeriodical] Skipping index range cleanup because the Elasticsearch cluster is unreachable or unhealthy
> 2021-11-15T01:06:43.824+01:00 INFO [JerseyService] Started REST API at <192.168.37.45:9000>
> 2021-11-15T01:06:43.836+01:00 INFO [ServerBootstrap] Services started, startup times in ms: {FailureHandlingService [RUNNING]=65, InputSetupService [RUNNING]=101, LocalKafkaMessageQueueWriter [RUNNING]=148, GracefulShutdownService [RUNNING]=160, BufferSynchronizerService [RUNNING]=209, UrlWhitelistService [RUNNING]=235, LocalKafkaMessageQueueReader [RUNNING]=249, DevelopmentDirectoryObserverService [RUNNING]=260, UserSessionTerminationService [RUNNING]=304, PrometheusExporter [RUNNING]=343, JobSchedulerService [RUNNING]=346, OutputSetupService [RUNNING]=380, LocalKafkaJournal [RUNNING]=432, EtagService [RUNNING]=439, ConfigurationEtagService [RUNNING]=443, ProcessingConfigurationManager [RUNNING]=457, MongoDBProcessingStatusRecorderService [RUNNING]=553, StreamCacheService [RUNNING]=843, PeriodicalsService [RUNNING]=1313, LookupTableService [RUNNING]=3385, JerseyService [RUNNING]=36330}
> 2021-11-15T01:06:43.848+01:00 INFO [ServiceManagerListener] Services are healthy
> 2021-11-15T01:06:43.862+01:00 INFO [InputSetupService] Triggering launching persisted inputs, node transitioned from Uninitialized [LB:DEAD] to Running [LB:ALIVE]
> 2021-11-15T01:06:43.990+01:00 WARN [JobExecutionEngine] Force-released 1 stale job triggers after an unclean job scheduler shutdown
> 2021-11-15T01:06:44.054+01:00 INFO [ServerBootstrap] Graylog server up and running.
> 2021-11-15T01:06:44.058+01:00 INFO [graylog-auditlog] urn:graylog:node:2f4965ee-d80f-4b81-beca-4aa4bb66bb37 node startup on 2f4965ee-d80f-4b81-beca-4aa4bb66bb37 complete - Graylog v4.2.1+5442e44
> 2021-11-15T01:06:44.095+01:00 INFO [InputStateListener] Input [Syslog UDP/5f7884a5add27a240130b7a7] is now STARTING
> 2021-11-15T01:06:44.115+01:00 INFO [InputStateListener] Input [GELF UDP/5f802e45bea61154cfb4cbf1] is now STARTING
> 2021-11-15T01:06:44.124+01:00 INFO [InputStateListener] Input [Syslog UDP/5f8308e4d7903a2540d4a198] is now STARTING
> 2021-11-15T01:06:44.133+01:00 INFO [InputStateListener] Input [Syslog UDP/5f86b8fbd7903a2540d943c8] is now STARTING
> 2021-11-15T01:06:44.140+01:00 INFO [InputStateListener] Input [Syslog UDP/5f86b9a9d7903a2540d94507] is now STARTING
> 2021-11-15T01:06:44.155+01:00 INFO [InputStateListener] Input [Syslog UDP/5f87159c014cea1d0d56c2e0] is now STARTING
> 2021-11-15T01:06:44.161+01:00 INFO [InputStateListener] Input [Syslog UDP/5f9ecadc4687dd05f6c1d0eb] is now STARTING
> 2021-11-15T01:06:44.166+01:00 INFO [InputStateListener] Input [GELF UDP/5f8cc561d7f89e1d858eaa77] is now STARTING
> 2021-11-15T01:06:44.183+01:00 INFO [InputStateListener] Input [Syslog UDP/5f9f0f674687dd05f6c25d61] is now STARTING
> 2021-11-15T01:06:44.660+01:00 INFO [connection] Opened connection [connectionId{localValue:11, serverValue:11}] to localhost:27017
> 2021-11-15T01:06:44.664+01:00 INFO [connection] Opened connection [connectionId{localValue:10, serverValue:10}] to localhost:27017
> 2021-11-15T01:06:44.702+01:00 INFO [connection] Opened connection [connectionId{localValue:12, serverValue:12}] to localhost:27017
> 2021-11-15T01:06:44.709+01:00 INFO [InputStateListener] Input [GELF UDP/6048c91c5690fc59a9739f2f] is now STARTING
> 2021-11-15T01:06:44.754+01:00 INFO [connection] Opened connection [connectionId{localValue:13, serverValue:13}] to localhost:27017
> 2021-11-15T01:06:45.458+01:00 WARN [UdpTransport] receiveBufferSize (SO_RCVBUF) for input SyslogUDPInput{title=chidi/trinacria, type=org.graylog2.inputs.syslog.udp.SyslogUDPInput, nodeId=2f4965ee-d80f-4b81-beca-4aa4bb66bb37} (channel [id: 0x0bbeafd3, L:/0:0:0:0:0:0:0:0%0:1507]) should be >= 1048576 but is 425984.
> 2021-11-15T01:06:45.460+01:00 WARN [UdpTransport] receiveBufferSize (SO_RCVBUF) for input SyslogUDPInput{title=chidi/trinacria, type=org.graylog2.inputs.syslog.udp.SyslogUDPInput, nodeId=2f4965ee-d80f-4b81-beca-4aa4bb66bb37} (channel [id: 0xb8beb9a1, L:/0:0:0:0:0:0:0:0%0:1507]) should be >= 1048576 but is 425984.
> 2021-11-15T01:06:45.490+01:00 WARN [UdpTransport] receiveBufferSize (SO_RCVBUF) for input SyslogUDPInput{title=chidi/trinacria, type=org.graylog2.inputs.syslog.udp.SyslogUDPInput, nodeId=2f4965ee-d80f-4b81-beca-4aa4bb66bb37} (channel [id: 0xe78da404, L:/0:0:0:0:0:0:0:0%0:1507]) should be >= 1048576 but is 425984.
> 2021-11-15T01:06:45.518+01:00 INFO [InputStateListener] Input [GELF UDP/5f802e45bea61154cfb4cbf1] is now RUNNING
> 2021-11-15T01:06:45.541+01:00 INFO [InputStateListener] Input [Syslog UDP/5f7884a5add27a240130b7a7] is now RUNNING
> 2021-11-15T01:06:45.563+01:00 INFO [InputStateListener] Input [Syslog UDP/5f9f0f674687dd05f6c25d61] is now RUNNING
> 2021-11-15T01:06:45.760+01:00 WARN [UdpTransport] receiveBufferSize (SO_RCVBUF) for input SyslogUDPInput{title=chidi/trinacria, type=org.graylog2.inputs.syslog.udp.SyslogUDPInput, nodeId=2f4965ee-d80f-4b81-beca-4aa4bb66bb37} (channel [id: 0x138f2c06, L:/0:0:0:0:0:0:0:0%0:1507]) should be >= 1048576 but is 425984.
> 2021-11-15T01:06:45.856+01:00 INFO [InputStateListener] Input [Syslog UDP/5f8308e4d7903a2540d4a198] is now RUNNING
> 2021-11-15T01:06:45.912+01:00 INFO [InputStateListener] Input [GELF UDP/5f8cc561d7f89e1d858eaa77] is now RUNNING
> 2021-11-15T01:06:45.932+01:00 INFO [InputStateListener] Input [Syslog UDP/5f86b8fbd7903a2540d943c8] is now RUNNING
> 2021-11-15T01:06:45.941+01:00 INFO [InputStateListener] Input [Syslog UDP/5f87159c014cea1d0d56c2e0] is now RUNNING
> 2021-11-15T01:06:45.973+01:00 INFO [InputStateListener] Input [Syslog UDP/5f9ecadc4687dd05f6c1d0eb] is now RUNNING
> 2021-11-15T01:06:45.982+01:00 INFO [InputStateListener] Input [Syslog UDP/5f86b9a9d7903a2540d94507] is now RUNNING
> 2021-11-15T01:06:46.032+01:00 INFO [InputStateListener] Input [GELF UDP/6048c91c5690fc59a9739f2f] is now RUNNING
> 2021-11-15T02:11:10.921+01:00 INFO [graylog-auditlog] urn:graylog:node:2f4965ee-d80f-4b81-beca-4aa4bb66bb37 Elasticsearch index range for index "dns_63" deleted
> 2021-11-15T18:40:24.606+01:00 INFO [graylog-auditlog] urn:graylog:user:ema session created (from 192.168.37.45)
> 2021-11-15T18:40:35.243+01:00 INFO [graylog-auditlog] urn:graylog:user:ema search 61929c2d6564c65444d9bd3f created
> 2021-11-15T18:40:36.246+01:00 INFO [graylog-auditlog] urn:graylog:user:ema search job 61929b94a67e764a68832799 for search 61929c2d6564c65444d9bd3f created
> 
> ```

### Operating system information

`Graylog 4.2.1+5442e44 on graylog.private (Debian 11.0.12 on Linux 4.19.0-18-amd64)`

### Package versions

- Graylog - 4.2.1
- MongoDB - 4.2.17
- Elasticsearch - 7.10.2
- Apache (reverse proxy) - Apache/2.4.38 (Debian)

---

<div class="post-metadata">

**Author:** ![tmacgbay](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/tmacgbay/32/3878_2.png) [@tmacgbay](https://community.graylog.org/u/tmacgbay)\
**Post date:** [November 15, 2021, 10:24pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/2 "2021-11-15T22:24:08Z")

</div>

The below lines in your log looked interesting and might need some more looking into - some of this may be that you had a forced shutdown. How does your Elasticsearch look? Use this command to check :

```auto

curl -XGET "localhost:9200/_cluster/health?pretty"

```

Concerning log entries:

2021-11-15T01:05:15.327+01:00 WARN [Log] Found a corrupted index file, /var/lib/graylog-server/journal/messagejournal-0/00000000000207983642.index, deleting and rebuilding index…

2021-11-15T01:05:17.572+01:00 INFO [cluster] Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout=‘30000 ms’, maxWaitQueueSize=5000}  
2021-11-15T01:05:17.834+01:00 INFO [cluster] Cluster description not yet available. Waiting for 30000 ms before timing out

2021-11-15T01:05:20.548+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).  
2021-11-15T01:05:25.561+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).  
2021-11-15T01:05:30.568+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).  
2021-11-15T01:05:35.573+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).  
2021-11-15T01:05:40.579+01:00 ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).

2021-11-15T01:06:12.140+01:00 INFO [IndexRetentionThread] Elasticsearch cluster not available, skipping index retention checks.  
2021-11-15T01:06:15.571+01:00 INFO [JerseyService] Enabling CORS for HTTP endpoint  
2021-11-15T01:06:23.281+01:00 INFO [IndexRangesCleanupPeriodical] Skipping index range cleanup because the Elasticsearch cluster is unreachable or unhealthy

---

<div class="post-metadata">

**Author:** ![gsmith](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/gsmith/32/1222_2.png) [@gsmith](https://community.graylog.org/u/gsmith)\
**Post date:** [November 16, 2021, 5:52am UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/3 "2021-11-16T05:52:36Z")

</div>

Hello,  
Adding on to what @tmacgbay suggested. I noticed some configuration that do not look right.

These two settings are the same IP address

`http_bind_address = 192.168.37.45:9000`

So you can leave this one commented out.

`http_publish_uri = http://192.168.37.45:9000/`

The reason why is as shown below, this is also stated in your Graylog configuration file.

```auto
# If $http_bind_address contains a wildcard IPv4 address (0.0.0.0), the first non-loopback IPv4 address of this machine will be used.
# This configuration setting *must not* contain a wildcard address!
#
# Default: http://$http_bind_address/

```

```auto
[quote="kaaroten, post:1, topic:21761"]
`ERROR [VersionProbe] Unable to retrieve version from Elasticsearch node: Failed to connect to /127.0.0.1:9200. - Connection refused (Connection refused).`
[/quote]

```

By default, Graylog connects to Elasticsearch using 127.0.0.1 in Graylog configuration file. Does your elasticsearch YAML file have the same address?

Does yours look something like this?

```auto
cluster.name: graylog
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: 127.0.0.1
http.port: 9200
action.auto_create_index: false
discovery.type: single-node

```

If you going to use **localhost** make sure it is set in your ` /etc/hosts` file.

`127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4`

Just curious, where did you see these settings below at in the documentation? They look like there used for Apache.

```auto
auditlog_log4j_enabled = true
auditlog_log4j_logger_name = graylog-auditlog

```

EDIT: I see now, those settings are for the commercial feature.  
[Setting Up Audit log](https://docs.graylog.org/v1/docs/setup-auditlog)

---

<div class="post-metadata">

**Author:** ![Arie](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/arie/32/8094_2.png) [@Arie](https://community.graylog.org/u/Arie)\
**Post date:** [November 17, 2021, 11:06am UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/4 "2021-11-17T11:06:31Z")

</div>

is "elasticsearch\_hosts = [http://localhsost:9200](http://localhsost:9200) in your server config file?

---

<div class="post-metadata">

**Author:** ![kaaroten](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/kaaroten/32/5113_2.png) [@kaaroten](https://community.graylog.org/u/kaaroten)\
**Post date:** [November 20, 2021, 6:53pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/5 "2021-11-20T18:53:33Z")

</div>

@tmacgbay  
I have to admit that I restored a snapshot taken before upgrading and retried the process, so I’m monitoring the situation right now, because it took one day for my issue to arise. It seems that elasticsearch is fine at the moment, anyways, here’s the output of that command:

```auto
{
  "cluster_name" : "elasticsearch",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 1,
  "number_of_data_nodes" : 1,
  "active_primary_shards" : 90,
  "active_shards" : 90,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0
}

```

The only thing I changed from the last time is that I stopped the services gracefully before the upgrade.

* * *

@gsmith  
I missed that piece of information

> [@gsmith](#):
>
> These two settings are the same IP address
> 
> `http_bind_address = 192.168.37.45:9000`
> 
> So you can leave this one commented out.
> 
> `http_publish_uri = http://192.168.37.45:9000/`
> 
> The reason why is as shown below, this is also stated in your Graylog configuration file.

Thanks, I left it commented now.

* * *

> [@gsmith](#):
>
> By default, Graylog connects to Elasticsearch using 127.0.0.1 in Graylog configuration file. Does your elasticsearch YAML file have the same address?

My `/etc/elasticsearch/elasticsearch.yml` file is all commented out. Is there another one elsewhere? I didn’t get it from the configuration.

* * *

@Arie  
That line is commented out, so I guess it’s the default configuration.

---

<div class="post-metadata">

**Author:** ![kaaroten](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/kaaroten/32/5113_2.png) [@kaaroten](https://community.graylog.org/u/kaaroten)\
**Post date:** [November 20, 2021, 7:13pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/6 "2021-11-20T19:13:40Z")

</div>

Update: it already started doing it again.

---

<div class="post-metadata">

**Author:** ![kaaroten](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/kaaroten/32/5113_2.png) [@kaaroten](https://community.graylog.org/u/kaaroten)\
**Post date:** [November 21, 2021, 9:06pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/7 "2021-11-21T21:06:29Z")

</div>

Update: I managed to figure the source: it’s the Telegram Notification Plugin.  
Everytime a Telegram notification is sent, the WebUI crashes.

I found the same issue in [this post](https://community.graylog.org/t/graylog-4-1-5-blank-page-when-try-to-access-web-interface/21208/6), where it’s said that I have to remove enterprise plugin to be able to get it to work.  
Thing is: I need both plugins.

What should I do?

---

<div class="post-metadata">

**Author:** ![tmacgbay](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/tmacgbay/32/3878_2.png) [@tmacgbay](https://community.graylog.org/u/tmacgbay)\
**Post date:** [November 22, 2021, 10:08pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/8 "2021-11-22T22:08:04Z")

</div>

> [@kaaroten](#):
>
> What should I do?

Contact the developer of the plugin and either request and update or offer to help update the code if you can. 🙂

---

<div class="post-metadata">

**Author:** ![gsmith](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/gsmith/32/1222_2.png) [@gsmith](https://community.graylog.org/u/gsmith)\
**Post date:** [November 22, 2021, 10:27pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/9 "2021-11-22T22:27:57Z")

</div>

Hello,

> [@kaaroten](#):
>
> My `/etc/elasticsearch/elasticsearch.yml` file is all commented out. Is there another one elsewhere? I didn’t get it from the configuration.

During your install of elasticsearch you should have configured your elasticsearch.yml

 ![image](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/2X/7/770029557eb8434872b74bfb0c357b17b171198a.png)

It at the bottom of the page.  
[https://docs.graylog.org/docs/configure](https://docs.graylog.org/docs/configure)

For example here is my lab GL server es.yml file.

```auto
[root@graylog elasticsearch]# cat /etc/elasticsearch/elasticsearch.yml | egrep -v "^\s*(#|$)"
cluster.name: graylog
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: 10.10.6.10
http.port: 9200
action.auto_create_index: false
discovery.type: single-node
path.repo: ["/etc/elasticsearch/my_repo"]
[root@graylog elasticsearch]#

```

By you stating that elasticsearch.yml file is all commented out, at this point I’m assuming there are some configuration issues happening.

---

<div class="post-metadata">

**Author:** ![kaaroten](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/kaaroten/32/5113_2.png) [@kaaroten](https://community.graylog.org/u/kaaroten)\
**Post date:** [November 26, 2021, 11:06pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/10 "2021-11-26T23:06:27Z")

</div>

I guess that is the source of the issue and I could only work from GitHub at this point.

Thanks

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/3X/c/7/c7c09c6b5099570133d6502b83f50ba4430de5b6.png) [@system](https://community.graylog.org/u/system)\
**Post date:** [December 10, 2021, 11:06pm UTC](https://community.graylog.org/t/intermittent-failure-to-load-the-webui-after-upgrade/21761/11 "2021-12-10T23:06:53Z")

</div>

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