Bundles in karaf failing due to "Bundle Exception: Uses constraint violation."

Question

I work on a multi module maven project with osgi bundles deployed to karaf. We are observing intermittent bundle start-up issues in our test and production environments due to the below error, which is later resolved after restarting the karaf container:

Caused by: org.osgi.framework.BundleException: Uses constraint violation. Unable to resolve resource myBundle [myBundle [16](R 16.0)] because it is exposed to package 'javax.el' from resources javax.el-api [javax.el-api [236](R 236.0)] and com.sun.el.javax.el [com.sun.el.javax.el [212](R 212.0)] via two dependency chains.

Chain 1:
  myBundle [myBundle [16](R 16.0)]
    import: (&(osgi.wiring.package=javax.el)(version>=3.0.0)(!(version>=4.0.0)))
     |
    export: osgi.wiring.package: javax.el
  javax.el-api [javax.el-api [236](R 236.0)]

Chain 2:
  myBundle [myBundle [16](R 16.0)]
    import: (&(osgi.wiring.package=com.sun.el)(version>=3.0.0)(!(version>=4.0.0)))
     |
    export: osgi.wiring.package: com.sun.el; uses:=javax.el
    export: osgi.wiring.package=javax.el
  com.sun.el.javax.el [com.sun.el.javax.el [212](R 212.0)] Unresolved requirements: [[myBundle [16](R 16.0)] osgi.wiring.package; (&(osgi.wiring.package=com.sun.el)(version>=3.0.0)(!(version>=4.0.0)))]
        at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:4111)[org.apache.felix.framework-5.4.0.jar:]
        at org.apache.felix.framework.Felix.startBundle(Felix.java:2117)[org.apache.felix.framework-5.4.0.jar:]
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:998)[org.apache.felix.framework-5.4.0.jar:]
        at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:984)[org.apache.felix.framework-5.4.0.jar:]
        at org.apache.karaf.features.internal.service.FeaturesServiceImpl.startBundle(FeaturesServiceImpl.java:1286)[10:org.apache.karaf.features.core:4.0.7]
        at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:846)[10:org.apache.karaf.features.core:4.0.7]
        ... 6 more

I went through these 2 related SO posts (Error starting bundle in karaf: "via two dependency chains" and Why are uses constraints violated when both chains end in the same bundle? ) but in my situation I am actually unable to determine where from the javax.el-api dependency is being introduced to myBundle. Our project uses Hibernate Validator, which requires the EL package from glassfish jar, so this is where the com.sun.el.javax.el package dependency is introduced. I was unable to determine where the javax.el-api dependency is being introduced from though. I tried checking the dependency tree using the below maven commands but to no avail.

mvn compile dependency:tree
mvn compile dependency:tree -D:verbose
mvn compile dependency:tree -D:verbose -Dincludes=javax.el

This is the dependency added for hibernate validator:

<dependency>
    <groupId>org.glassfish</groupId>
    <artifactId>javax.el</artifactId>
    <version>3.0.1-b08</version>
</dependency>

The karaf version being used is 4.0.7

Any help will be appreciated.

It seems to me that your bundle is also exporting the javax.el class, can you show me your MANIFEST.MF file? — Cλstor, Aug 21 '18 at 22:47
@Cλstor Looks like another bundle in the project is dependent on a conflicting version of javax.el class; it is being investigated. Meanwhile I cannot share the manifest file for that bundle, but if it helps I do not see any conflicting javax.el versions in there. I only see this: `"javax.el;version="[3.0,4)""` — Sanjeev R, Aug 27 '18 at 12:24

Bundles in karaf failing due to "Bundle Exception: Uses constraint violation."

0 Answers0