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https://issues.apache.org/jira/browse/KARAF-7948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jean-Baptiste Onofré reassigned KARAF-7948:
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Assignee: Jean-Baptiste Onofré
> Apache karaf got into stuck state
> ---------------------------------
>
> Key: KARAF-7948
> URL: https://issues.apache.org/jira/browse/KARAF-7948
> Project: Karaf
> Issue Type: Bug
> Components: karaf
> Affects Versions: 4.2.16
> Reporter: Vineeth
> Assignee: Jean-Baptiste Onofré
> Priority: Major
>
> We have a customer case where Apache Karaf(agent) is installed as a *systemd*
> [service|https://github.com/apache/karaf/blob/main/assemblies/features/base/src/main/resources/resources/bin/contrib/karaf-service-template.systemd].
> When the virtual machine (VM) is restarted, where Apache Karaf is set up as
> a service, the Karaf process sometimes enters a {*}stuck state{*}. Although
> the PID is still running, Karaf becomes completely unresponsive.
> There is no definite pattern — it happens intermittently. We investigated
> multiple heap dumps but couldn't find any clear clues. However, in one
> instance, we observed *two instances* of the {{FeaturesServiceImpl}} class,
> which suggests that the Activator may have initialized
> {{FeaturesServiceImpl}} {*}twice{*}, even though this only occurred once
> during our tests.
> Later, we checked the state of each bundle. We noticed that the
> mvn:org.apache.karaf.features/org.apache.karaf.features.extension/4.2.16
> bundle and the mvn:org.ops4j.pax.logging/pax-logging-log4j2-extra/1.11.15
> bundle were in *state 2* (resolved), while all other bundles were in *state
> 32* (uninstalled). This points to a possible *race condition* or a low-level
> crash occurring during startup.
> We were able to reproduce the issue by looping a restart of the systemd
> service using {{systemctl restart agent.service}} every 4 minutes. However,
> we have been unable to pinpoint the exact cause of the problem.
> Please review this and let us know if you can help us further diagnose the
> issue.
> Details
> Customer uses Suse Linux on z , installed as rpm package using zypper
> Apache karaf version: 4.2.16
> Log : There no log wriiten after startup. It will simply writes nothing.
> We can share more details, if needed
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