# 502 error Nexus failed to resolve the artifact

**URL:** <https://community.sonatype.com/t/502-error-nexus-failed-to-resolve-the-artifact/12963>\
**Category:** Sonatype Nexus Repository\
**Tags:** help\
**Created:** [July 28, 2024, 11:23pm UTC](https://community.sonatype.com/t/502-error-nexus-failed-to-resolve-the-artifact/12963 "2024-07-28T23:23:43Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![rico.gamero](https://avatars.discourse-cdn.com/v4/letter/r/d6d6ee/32.png) [@rico.gamero](https://community.sonatype.com/u/rico.gamero)\
**Post date:** [July 28, 2024, 11:23pm UTC](https://community.sonatype.com/t/502-error-nexus-failed-to-resolve-the-artifact/12963/1 "2024-07-28T23:23:43Z")

</div>

Nexus was not able to be reached and we are getting a 502 error. We had the same issue a couple of months ago, which we resolved by upgrading the version from 3.41.0-01 to 3.50.0-01. At that time, we determined that the issue was possibly caused by a [corrupt file](https://support.sonatype.com/hc/en-us/articles/4403663666835-Starting-Nexus-Repository-3-as-a-service-may-result-in-a-Karaf-NullPointerException-on-start-up). However, it seems the issue has occurred again.

Looking at the logs, it shows that the system shut down and was restarted. During startup, Nexus failed to resolve the artifact com.sonatype.nexus.assemblies:nexus-flags-feature:xml:features:3.50.0-01 from the Maven Central repository. This issue, indicated by a `java.io.IOException`, may be due to the artifact being missing, a misconfigured repository, or network problems.  
I’m not really familiar with this service and would like some advice what could be the issues.

I got the service back up by rebooting and restarting the service a couple of times, which still don’t understand the root cause of the issue. I verified the filesystem usage, which has a total size of about 20 GB, with around 11.7 GB used and 8.2 GB available, representing 59% of the space used. I’m thinking it might be due to the cache being full with old data, but I’m not sure.

```auto
df -m

Filesystem 1M-blocks Used Available Use% Mounted on

devtmpfs 3854 1 3854 1% /dev

tmpfs 3864 1 3864 1% /dev/shm

/dev/nvme0n1p1 20029 11749 8183 59% /

```

Error logs

```auto
2024-07-26 18:30:00,022+0000 INFO [quartz-17-thread-5] *SYSTEM org.sonatype.nexus.scheduling.TaskSchedulerImpl - Task 'System - Repository Health Check: docker-proxy' [healthcheck] scheduled: hourly
2024-07-26 18:30:00,038+0000 INFO [quartz-17-thread-5] *SYSTEM org.sonatype.nexus.quartz.internal.task.QuartzTaskInfo - Task 'System - Repository Health Check: docker-proxy' [healthcheck] state change RUNNING -> WAITING (OK)
2024-07-26 18:30:00,044+0000 INFO [quartz-17-thread-6] *SYSTEM org.sonatype.nexus.quartz.internal.task.QuartzTaskInfo - Task 'Storage facet cleanup' [repository.storage-facet-cleanup] state change WAITING -> RUNNING
2024-07-26 18:30:00,098+0000 INFO [quartz-17-thread-6] *SYSTEM org.sonatype.nexus.quartz.internal.task.QuartzTaskInfo - Task 'Storage facet cleanup' [repository.storage-facet-cleanup] state change RUNNING -> WAITING (OK)
2024-07-26 18:30:00,483+0000 INFO [quartz-17-thread-4] *SYSTEM org.sonatype.nexus.scheduling.TaskSchedulerImpl - Task 'System - Repository Health Check: pypi-proxy' [healthcheck] scheduled: hourly
2024-07-26 18:30:00,485+0000 INFO [quartz-17-thread-4] *SYSTEM org.sonatype.nexus.quartz.internal.task.QuartzTaskInfo - Task 'System - Repository Health Check: pypi-proxy' [healthcheck] state change RUNNING -> WAITING (OK)
2024-07-26 18:30:01,381+0000 INFO [jetty-main-1] *SYSTEM org.sonatype.nexus.siesta.SiestaServlet - Initialized
2024-07-26 18:30:01,402+0000 INFO [jetty-main-1] *SYSTEM org.sonatype.nexus.repository.httpbridge.internal.ViewServlet - Initialized
2024-07-26 18:30:01,506+0000 INFO [jetty-main-1] *SYSTEM org.eclipse.jetty.server.handler.ContextHandler - Started o.e.j.w.WebAppContext@5bdce1b7{Sonatype Nexus,/,file:///opt/nexus/nexus-3.50.0-01/public/,AVAILABLE}
2024-07-26 18:30:01,648+0000 INFO [jetty-main-1] *SYSTEM org.eclipse.jetty.server.AbstractConnector - Started ServerConnector@76d5ebe1{HTTP/1.1, (http/1.1)}{0.0.0.0:8081}
2024-07-26 18:30:01,649+0000 INFO [jetty-main-1] *SYSTEM org.eclipse.jetty.server.Server - Started @70710ms
2024-07-26 18:30:01,649+0000 INFO [jetty-main-1] *SYSTEM org.sonatype.nexus.bootstrap.jetty.JettyServer -
-------------------------------------------------

Started Sonatype Nexus OSS 3.50.0-01

-------------------------------------------------
2024-07-26 18:30:01,663+0000 INFO [jetty-main-1] *SYSTEM org.eclipse.jetty.server.AbstractConnector - Started ServerConnector@62441b53{HTTP/1.1, (http/1.1)}{0.0.0.0:8082}
2024-07-26 18:30:02,727+0000 INFO [elasticsearch[7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6][clusterService#updateTask][T#1]] *SYSTEM org.elasticsearch.cluster.metadata - [7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6] [5487f488ab41b476626080dfcae92a9efd87d9d2] update_mapping [component]
2024-07-26 18:30:03,661+0000 INFO [qtp1544016644-82] *UNKNOWN org.apache.shiro.session.mgt.AbstractValidatingSessionManager - Enabling session validation scheduler...
2024-07-26 18:30:03,709+0000 INFO [qtp1544016644-82] *UNKNOWN org.sonatype.nexus.internal.security.anonymous.AnonymousManagerImpl - Loaded configuration: OrientAnonymousConfiguration{enabled=true, userId='anonymous', realmName='NexusAuthorizingRealm'}
2024-07-26 18:30:05,537+0000 INFO [qtp1544016644-86] *UNKNOWN org.sonatype.nexus.repository.httpclient.internal.HttpClientFacetImpl - Repository status for npm-proxy changed from READY to AVAILABLE - reason n/a for n/a
2024-07-26 18:30:09,356+0000 INFO [elasticsearch[7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6][clusterService#updateTask][T#1]] *SYSTEM org.elasticsearch.cluster.metadata - [7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6] [5487f488ab41b476626080dfcae92a9efd87d9d2] update_mapping [component]
2024-07-26 18:30:14,632+0000 INFO [elasticsearch[7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6][clusterService#updateTask][T#1]] *SYSTEM org.elasticsearch.cluster.metadata - [7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6] [5487f488ab41b476626080dfcae92a9efd87d9d2] update_mapping [component]
2024-07-26 18:30:15,524+0000 INFO [elasticsearch[7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6][clusterService#updateTask][T#1]] *SYSTEM org.elasticsearch.cluster.metadata - [7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6] [5487f488ab41b476626080dfcae92a9efd87d9d2] update_mapping [component]
2024-07-26 18:30:16,997+0000 INFO [elasticsearch[7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6][clusterService#updateTask][T#1]] *SYSTEM org.elasticsearch.cluster.metadata - [7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6] [5487f488ab41b476626080dfcae92a9efd87d9d2] update_mapping [component]
2024-07-26 18:30:33,609+0000 INFO [elasticsearch[7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6][clusterService#updateTask][T#1]] *SYSTEM org.elasticsearch.cluster.metadata - [7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6] [5487f488ab41b476626080dfcae92a9efd87d9d2] update_mapping [component]
2024-07-26 18:30:42,739+0000 INFO [elasticsearch[7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6][clusterService#updateTask][T#1]] *SYSTEM org.elasticsearch.cluster.metadata - [7468D7B6-7AF3FB80-64589C43-2BC7A5DC-1AE83DC6] [5487f488ab41b476626080dfcae92a9efd87d9d2] update_mapping [component]
2024-07-26 18:30:50,283+0000 WARN [event-20-thread-6] anonymous org.sonatype.nexus.transaction.RetryController - Exceeded retry limit: 8/8 (org.sonatype.nexus.repository.browse.internal.orient.BrowseNodeCollisionException: Node already has an asset^M
        DB name="component")
2024-07-26 18:30:50,295+0000 WARN [event-20-thread-6] anonymous org.sonatype.nexus.repository.browse.internal.orient.OrientBrowseNodeManager - Problem generating browse nodes for Asset{metadata=AttachedEntityMetadata{schema=asset, document=#20:103777{bucket:#16:8,format:npm,last_updated:Fri Jul 26 18:30:48 UTC 2024,attributes:[5],component:null,name:check-error,size:26289,content_type:application/json,created_by:anonymous,created_by_ip:10.32.2.73,blob_ref:npm@9e6c5919-4343-42c8-b1a5-ce7e6724f232,last_downloaded:Fri Jul 26 18:30:48 UTC 2024,blob_created:Thu Mar 17 21:26:08 UTC 2022,blob_updated:Thu May 09 17:05:14 UTC 2024} v723}, name=check-error}
org.sonatype.nexus.repository.browse.internal.orient.BrowseNodeCollisionException: Node already has an asset^M
        DB name="component"
        at org.sonatype.nexus.repository.browse.internal.orient.BrowseNodeEntityAdapter.createAssetNode(BrowseNodeEntityAdapter.java:308)
        at org.sonatype.nexus.repository.browse.internal.orient.OrientBrowseNodeStore.lambda$1(OrientBrowseNodeStore.java:168)
        at org.sonatype.nexus.orient.transaction.OrientOperations.lambda$2(OrientOperations.java:62)
        at org.sonatype.nexus.transaction.OperationPoint.lambda$0(OperationPoint.java:53)
        at org.sonatype.nexus.transaction.OperationPoint.proceed(OperationPoint.java:64)
        at org.sonatype.nexus.transaction.TransactionalWrapper.proceedWithTransaction(TransactionalWrapper.java:58)
        at org.sonatype.nexus.transaction.Operations.proceedWithTransaction(Operations.java:237)
        at org.sonatype.nexus.transaction.Operations.transactional(Operations.java:228)
        at org.sonatype.nexus.transaction.Operations.run(Operations.java:180)
        at org.sonatype.nexus.orient.transaction.OrientOperations.run(OrientOperations.java:62)
        at org.sonatype.nexus.repository.browse.internal.orient.OrientBrowseNodeStore.createAssetNode(OrientBrowseNodeStore.java:168)
        at org.sonatype.nexus.common.stateguard.MethodInvocationAction.run(MethodInvocationAction.java:39)
        at org.sonatype.nexus.common.stateguard.StateGuard$GuardImpl.run(StateGuard.java:272)
        at org.sonatype.nexus.common.stateguard.GuardedInterceptor.invoke(GuardedInterceptor.java:54)
        at org.sonatype.nexus.repository.browse.internal.orient.OrientBrowseNodeManager.createBrowseNodes(OrientBrowseNodeManager.java:137)
        at org.sonatype.nexus.repository.browse.internal.orient.OrientBrowseNodeManager.createFromAsset(OrientBrowseNodeManager.java:80)

```

---

<div class="post-metadata">

**Author:** ![mpiggott](https://avatars.discourse-cdn.com/v4/letter/m/f0a364/32.png) [@mpiggott](https://community.sonatype.com/u/mpiggott)\
**Post date:** [July 29, 2024, 1:34pm UTC](https://community.sonatype.com/t/502-error-nexus-failed-to-resolve-the-artifact/12963/3 "2024-07-29T13:34:08Z")

</div>

Hi, this bug was resolved in a later version.

To stay on the current version I’d suggest following the upgrade instructions in the help docs but use the same version.

---

<div class="post-metadata">

**Author:** ![rico.gamero](https://avatars.discourse-cdn.com/v4/letter/r/d6d6ee/32.png) [@rico.gamero](https://community.sonatype.com/u/rico.gamero)\
**Post date:** [July 30, 2024, 2:30pm UTC](https://community.sonatype.com/t/502-error-nexus-failed-to-resolve-the-artifact/12963/4 "2024-07-30T14:30:48Z")

</div>

Hey Matthew, thank you for responding to my issue.

Are you suggesting that the file might be corrupted in version 3.50.0-01 and by reinstalling the same version resolve the problem?

Just for reference can you please point me to the document were it states the bug I’m seeing?

---

<div class="post-metadata">

**Author:** ![rseddon](https://yyz1.discourse-cdn.com/flex047/user_avatar/community.sonatype.com/rseddon/32/341_2.png) [@rseddon](https://community.sonatype.com/u/rseddon)\
**Post date:** [July 30, 2024, 7:18pm UTC](https://community.sonatype.com/t/502-error-nexus-failed-to-resolve-the-artifact/12963/5 "2024-07-30T19:18:46Z")

</div>

This is a known issue in versions of Nexus Repo prior to 3.57.0. Please see here: [https://support.sonatype.com/hc/en-us/articles/18636313163411-startup-fails-due-to-partially-written-install-configuration-files-from-karaf-bootstrap](https://support.sonatype.com/hc/en-us/articles/18636313163411-startup-fails-due-to-partially-written-install-configuration-files-from-karaf-bootstrap)