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  1. Log4j 2
  2. LOG4J2-346

Cyclic dependency in OSGi-context. Apache Log4j SLF4J Binding <-> slf4j-api



    • Type: Bug
    • Status: Resolved
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: 2.0-beta4, 2.0-beta8, 2.0-beta9, 2.0-rc1
    • Fix Version/s: 2.0-rc2
    • Component/s: Core, SLF4J Bridge
    • Labels:
    • Environment:

      OSGi R5 / Apache Felix 4.x


      The bundle "Apache Log4j SLF4J Binding" (2.0.0.beta8) has an unresolved dependency to the package org.slf4j which is exported by the slf4j-api bundle. The Slf4j-api bundle has also an unresolved dependency to the package org.slf4j.impl which is exported by the bundle "Apache Log4j SLF4J Binding". Without the slf4j-api everything works. But the Slf4j-api bundle is needed because of given dependencies of third-party-bundles. The "Apache Log4j SLF4J Binding" bundle should also export the package org.slf4j.


      ID|State |Level|Name
      0|Active | 0|System Bundle (4.2.1)
      4|Active | 2|Apache Felix Bundle Repository (1.6.6)
      5|Active | 2|Apache Felix Configuration Admin Service (1.6.0)
      6|Active | 2|Apache Felix Gogo Command (0.12.0)
      7|Active | 2|Apache Felix Gogo Runtime (0.10.0)
      8|Active | 2|Apache Felix Gogo Shell (0.10.0)
      9|Resolved | 2|Apache Felix Security Provider (2.2.0)
      10|Active | 2|Apache Felix Shell Service (1.4.3)
      11|Installed | 2|Apache Log4j 1.x Compatibility API (2.0.0.beta8)
      12|Active | 2|Apache Log4j API (2.0.0.beta8)
      13|Installed | 2|Apache Log4j Commons Logging Bridge (2.0.0.beta8)
      14|Installed | 2|Apache Log4j Core (2.0.0.beta8)
      15|Installed | 2|Apache Log4j SLF4J Binding (2.0.0.beta8)
      16|Active | 2|cal10n-api (0.7.4)
      17|Active | 2|Commons IO (2.4.0)
      18|Active | 2|Commons Lang (2.6.0)
      19|Active | 2|Data mapper for Jackson JSON processor (1.9.13)
      20|Active | 2|Jackson JSON processor (1.9.13)
      21|Active | 2|JSON.simple (1.1.1)
      22|Installed | 2|slf4j-api (1.5.11)
      23|Installed | 2|slf4j-ext (1.5.11)

      Unresolved constraint in bundle org.apache.logging.log4j-slf4j-impl [15]: Unable to resolve 15.0: missing requirement [15.0] osgi.wiring.package; (osgi.wiring.package=org.slf4j) [caused by: Unable to resolve 22.0: missing requirement [22.0] osgi.wiring.package; (&(osgi.wiring.package=org.slf4j.impl)(version>=1.5.5))]

      Unresolved constraint in bundle slf4j.api [22]: Unable to resolve 22.0: missing requirement [22.0] osgi.wiring.package; (&(osgi.wiring.package=org.slf4j.impl)(version>=1.5.5))


        1. 0001-Add-SLF4J-related-bundles.patch
          12 kB
          Matt Sicker
        2. log4j2-slf4j-impl.patch
          2 kB
          Roland Weiglhofer



            • Assignee:
              mattsicker Matt Sicker
              rol Roland Weiglhofer
            • Votes:
              2 Vote for this issue
              4 Start watching this issue


              • Created: