Thanks, let me investigate.

I will keep you posted.

Regards
JB

On Wed, Apr 1, 2026 at 5:48 PM Matthias Leinweber
<[email protected]> wrote:
>
> Sure
>
> <?xml version="1.0" encoding="UTF-8"?>
>
> <project xmlns="http://maven.apache.org/POM/4.0.0"; 
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
> http://maven.apache.org/xsd/maven-4.0.0.xsd";>
>
>   <artifactId>rahla</artifactId>
>
>
>   <groupId>rahla.assembly</groupId>
>   <modelVersion>4.0.0</modelVersion>
>
>   <name>Rahla Assembly</name>
>
>   <packaging>karaf-assembly</packaging>
>
>
>   <parent>
>     <artifactId>reactor</artifactId>
>     <groupId>rahla</groupId>
>     <relativePath>../pom.xml</relativePath>
>     <version>1.3.1-SNAPSHOT</version>
>   </parent>
>
>   <dependencies>
>     <dependency>
>       <groupId>org.apache.karaf.features</groupId>
>       <artifactId>framework</artifactId>
>       <type>kar</type>
>       <scope>compile</scope>
>     </dependency>
>
>     <dependency>
>       <groupId>org.apache.karaf.features</groupId>
>       <artifactId>framework</artifactId>
>       <classifier>features</classifier>
>       <type>xml</type>
>       <scope>runtime</scope>
>     </dependency>
>
>     <dependency>
>       <groupId>org.apache.karaf.features</groupId>
>       <artifactId>standard</artifactId>
>       <classifier>features</classifier>
>       <type>xml</type>
>       <scope>runtime</scope>
>     </dependency>
>
>     <dependency>
>       <groupId>org.apache.karaf.features</groupId>
>       <artifactId>spring-legacy</artifactId>
>       <classifier>features</classifier>
>       <type>xml</type>
>       <scope>runtime</scope>
>     </dependency>
>
>     <dependency>
>       <groupId>org.apache.karaf.features</groupId>
>       <artifactId>enterprise</artifactId>
>       <classifier>features</classifier>
>       <type>xml</type>
>       <scope>runtime</scope>
>     </dependency>
>
>     <dependency>
>       <artifactId>apache-camel</artifactId>
>       <classifier>features</classifier>
>       <groupId>org.apache.camel.karaf</groupId>
>       <scope>runtime</scope>
>       <type>xml</type>
>     </dependency>
>
>     <dependency>
>       <groupId>org.apache.karaf.features</groupId>
>       <artifactId>specs</artifactId>
>       <classifier>features</classifier>
>       <type>xml</type>
>       <scope>runtime</scope>
>     </dependency>
>
>     <dependency>
>       <artifactId>rahla</artifactId>
>       <classifier>features</classifier>
>       <groupId>rahla.feature</groupId>
>       <scope>runtime</scope>
>       <type>xml</type>
>     </dependency>
>
>     <dependency>
>       <artifactId>fradi</artifactId>
>       <classifier>features</classifier>
>       <groupId>rahla.feature</groupId>
>       <scope>runtime</scope>
>       <type>xml</type>
>     </dependency>
>
>     <dependency>
>       <artifactId>graphsource</artifactId>
>       <classifier>features</classifier>
>       <groupId>rahla.feature</groupId>
>       <scope>runtime</scope>
>       <type>xml</type>
>     </dependency>
>
>     <dependency>
>       <artifactId>jedissource</artifactId>
>       <classifier>features</classifier>
>       <groupId>rahla.feature</groupId>
>       <scope>runtime</scope>
>       <type>xml</type>
>     </dependency>
>     <dependency>
>       <artifactId>camel-route-templates</artifactId>
>       <classifier>features</classifier>
>       <groupId>rahla.feature</groupId>
>       <scope>runtime</scope>
>       <type>xml</type>
>     </dependency>
>     <dependency>
>       <artifactId>rahla-logging</artifactId>
>       <classifier>features</classifier>
>       <groupId>rahla.feature</groupId>
>       <scope>compile</scope>
>       <type>xml</type>
>     </dependency>
>
>   </dependencies>
>
>
>   <build>
>     <plugins>
>       <plugin>
>         <artifactId>maven-install-plugin</artifactId>
>         <configuration>
>           <skip>true</skip>
>         </configuration>
>         <groupId>org.apache.maven.plugins</groupId>
>       </plugin>
>       <plugin>
>         <groupId>org.apache.maven.plugins</groupId>
>         <artifactId>maven-deploy-plugin</artifactId>
>         <configuration>
>           <skip>true</skip>
>         </configuration>
>       </plugin>
>       <plugin>
>         <artifactId>karaf-maven-plugin</artifactId>
>         <configuration>
>           <archiveTarGz>false</archiveTarGz>
>           <archiveZip>false</archiveZip>
>           <startupFeatures>
>             <feature>rahla-logging</feature>
>             <feature>wrap</feature>
>           </startupFeatures>
>           <bootFeatures>
>             <feature>standard</feature>
>             <feature>scr</feature>
>             <feature>spifly</feature>
>             <feature>pax-web-http-undertow</feature>
>             <feature>jolokia</feature>
>             <feature>rahla</feature>
>           </bootFeatures>
>           <installedFeatures>
>             <feature>fradi</feature>
>             <feature>graphsource</feature>
>             <feature>jedissource</feature>
>             <feature>camel-route-templates</feature>
>           </installedFeatures>
>           <libraries>
>             
> <library>mvn:io.prometheus.jmx/jmx_prometheus_javaagent/${jmx_exporter.version}</library>
>             
> <library>mvn:io.opentelemetry.javaagent/opentelemetry-javaagent/${opentelemetry_agent.version}</library>
>           </libraries>
>           <blacklistedBundles>
>             <bundle>mvn:org.apache.groovy/groovy/[4,5)</bundle>
>             <bundle>mvn:com.fasterxml.woodstox/woodstox-core/7.0.0</bundle>
>             <bundle>mvn:io.undertow/undertow-core/2.2.37.Final</bundle>
>             <bundle>mvn:io.undertow/undertow-servlet/2.2.37.Final</bundle>
>             <!--<bundle>mvn:org.codehaus.woodstox/stax2-api/4.2.1</bundle>
>             <bundle>mvn:org.codehaus.woodstox/woodstox-core-asl/4.4.1</bundle>
>             <bundle>mvn:org.yaml/snakeyaml/1.30</bundle>-->
>           </blacklistedBundles>
>           <javase>17</javase>
>         </configuration>
>         <groupId>org.apache.karaf.tooling</groupId>
>       </plugin>
>     </plugins>
>     <resources>
>       <resource>
>         <directory>src/main/resources</directory>
>         <filtering>false</filtering>
>         <includes>
>           <include>**/*</include>
>         </includes>
>       </resource>
>       <resource>
>         <directory>src/main/filtered-resources</directory>
>         <filtering>true</filtering>
>         <includes>
>           <include>**/*</include>
>         </includes>
>       </resource>
>     </resources>
>   </build>
> </project>
>
>
>
> Am Mi., 1. Apr. 2026 um 15:22 Uhr schrieb Jean-Baptiste Onofré 
> <[email protected]>:
>>
>> Hi Matthias
>>
>> I suspect it's related to a change I did on the karaf-maven-plugin (around 
>> assembly).
>>
>> Can you share with me the pom.xml to reproduce it ?
>>
>> Thanks,
>>
>> Regards
>> JB
>>
>> On Tue, Mar 31, 2026 at 6:46 PM Matthias Leinweber 
>> <[email protected]> wrote:
>>>
>>> Dear Karaf Users,
>>>
>>> I am currently maintaining a Karaf assembly and am in the process of 
>>> upgrading to version 4.4.10. However, I am encountering an error message 
>>> during startup and would appreciate guidance on how to begin debugging this 
>>> issue
>>>
>>> java.lang.RuntimeException: Repository spec is empty string. : 
>>> mvn:org.apache.karaf.features/standard/4.4.10/xml/features
>>> at 
>>> org.apache.karaf.features.internal.service.RepositoryImpl.load(RepositoryImpl.java:121)
>>> at 
>>> org.apache.karaf.features.internal.service.RepositoryImpl.<init>(RepositoryImpl.java:51)
>>> at 
>>> org.apache.karaf.features.internal.service.RepositoryCacheImpl.create(RepositoryCacheImpl.java:51)
>>> at 
>>> org.apache.karaf.features.internal.service.FeaturesServiceImpl.addRepository(FeaturesServiceImpl.java:386)
>>> at 
>>> org.apache.karaf.features.internal.service.FeaturesServiceImpl.addRepository(FeaturesServiceImpl.java:381)
>>> at 
>>> org.apache.karaf.features.internal.service.BootFeaturesInstaller.addRepositories(BootFeaturesInstaller.java:136)
>>> at 
>>> org.apache.karaf.features.internal.service.BootFeaturesInstaller.installBootFeatures(BootFeaturesInstaller.java:95)
>>> at 
>>> org.apache.karaf.features.internal.service.BootFeaturesInstaller.start(BootFeaturesInstaller.java:89)
>>> at 
>>> org.apache.karaf.features.internal.osgi.Activator.doStart(Activator.java:215)
>>> at org.apache.karaf.util.tracker.BaseActivator.run(BaseActivator.java:312)
>>> at 
>>> java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
>>> at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
>>> at 
>>> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
>>> at 
>>> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
>>> at java.base/java.lang.Thread.run(Thread.java:1583)
>>> Caused by: shaded.org.ops4j.lang.NullArgumentException: Repository spec is 
>>> empty string.
>>> at 
>>> shaded.org.ops4j.lang.NullArgumentException.validateNotEmpty(NullArgumentException.java:108)
>>> at 
>>> org.ops4j.pax.url.mvn.internal.config.MavenRepositoryURL.<init>(MavenRepositoryURL.java:221)
>>> at 
>>> org.ops4j.pax.url.mvn.internal.config.MavenConfigurationImpl.getRepositories(MavenConfigurationImpl.java:401)
>>> at 
>>> org.ops4j.pax.url.mvn.internal.AetherBasedResolver.selectRemoteRepositories(AetherBasedResolver.java:928)
>>> at 
>>> org.ops4j.pax.url.mvn.internal.AetherBasedResolver.resolve(AetherBasedResolver.java:368)
>>> at 
>>> org.ops4j.pax.url.mvn.internal.AetherBasedResolver.resolve(AetherBasedResolver.java:352)
>>> at 
>>> org.ops4j.pax.url.mvn.internal.AetherBasedResolver.resolve(AetherBasedResolver.java:322)
>>> at 
>>> org.ops4j.pax.url.mvn.internal.AetherBasedResolver.resolve(AetherBasedResolver.java:312)
>>> at 
>>> org.ops4j.pax.url.mvn.internal.Connection.getInputStream(Connection.java:120)
>>> at java.base/java.net.URL.openStream(URL.java:1325)
>>> at 
>>> org.apache.karaf.features.internal.service.RepositoryImpl.load(RepositoryImpl.java:114)
>>> ... 14 more
>>>
>>>
>>> Could you please advise on the best approach or specific logs I should 
>>> examine to identify the root cause? I get this erorr for every feature 
>>> defined in my karaf-assembly
>>>
>>> Best regards,
>>>
>>> Matthias Leinweber
>>>

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