Hi, I am currently investigating a nasty uses conflict (Bug 513809 [1]) that causes severe problems in several Oxygen M6 EPP packages (at least Java and JEE) and I could really need some help from an OSGi expert.
First, the wiring problem in question *does* have a solution, but -clean doesn't find it. Is this an Equinox bug or simply a known limitation, given the NP completeness of bundle resolution? Second, some of the Import-Packages' version ranges look either overly specific [4.2.1,4.4) or overly broad [4.3.3,), so I wonder *if* this problem could be prevented by fixing those Import-Packages (under the assumption that all bundles in question adhere to semantic versioning). Anyway, here's the uses conflict I was talking about: > Chain 1: > org.eclipse.aether.transport.http [osgi.identity; type="osgi.bundle"; > version:Version="1.0.1.v20141111"; > osgi.identity="org.eclipse.aether.transport.http"] > import: > (&(osgi.wiring.package=org.apache.http)(&(version>=4.2.1)(!(version>=4.4.0)))) > | > export: osgi.wiring.package: org.apache.http > org.apache.httpcomponents.httpcore [osgi.identity; type="osgi.bundle"; > version:Version="4.3.3.v201411290715"; > osgi.identity="org.apache.httpcomponents.httpcore"] > > Chain 2: > org.eclipse.aether.transport.http [osgi.identity; type="osgi.bundle"; > version:Version="1.0.1.v20141111"; > osgi.identity="org.eclipse.aether.transport.http"] > import: > (&(osgi.wiring.package=org.apache.http.auth)(&(version>=4.2.1)(!(version>=4.4.0)))) > | > export: osgi.wiring.package=org.apache.http.auth; > uses:=org.apache.http.protocol > org.apache.httpcomponents.httpclient [osgi.identity; type="osgi.bundle"; > version:Version="4.3.6.v201511171540"; > osgi.identity="org.apache.httpcomponents.httpclient"] > import: (&(osgi.wiring.package=org.apache.http.protocol)(version>=4.3.3)) > | > export: osgi.wiring.package: org.apache.http.protocol; > uses:=org.apache.http > export: osgi.wiring.package=org.apache.http > org.apache.httpcomponents.httpcore [osgi.identity; type="osgi.bundle"; > version:Version="4.4.6.v20170210-0925"; > osgi.identity="org.apache.httpcomponents.httpcore"] In my opinion, the above could be solved by wiring all packages imported by bundle org.apache.httpcomponents.httpclient 4.3.6.v201511171540 to the packages exported by bundle org.apache.httpcomponents.httpcore 4.3.3.v201411290715 (as is done in Neon.3), but apparently the presence of a newer version of org.apache.httpcomponents.httpcore is too tempting for Equinox. Any insights on this issue are really appreciated. Best wishes, Andreas [1] <https://bugs.eclipse.org/bugs/show_bug.cgi?id=513809#c0> -- Codetrails GmbH The knowledge transfer company Robert-Bosch-Str. 7, 64293 Darmstadt Phone: +49-6151-276-7092 Mobile: +49-170-811-3791 http://www.codetrails.com/ Managing Director: Dr. Marcel Bruch Handelsregister: Darmstadt HRB 91940
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