[jira] [Created] (KARAF-5604) karaf:features-generate-descriptor takes long when faced with complex feature dependencies

["Robert Varga (JIRA)" <ji...@apache.org>]

Robert Varga created KARAF-5604:
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             Summary: karaf:features-generate-descriptor takes long when faced with complex feature dependencies
                 Key: KARAF-5604
                 URL: https://issues.apache.org/jira/browse/KARAF-5604
             Project: Karaf
          Issue Type: Improvement
          Components: karaf-tooling
    Affects Versions: 4.1.3
            Reporter: Robert Varga
             Fix For: 4.2.0, 4.1.5


Opendaylight's distribution-check jobs generate features which have complex feature dependencies, which exposes scaling issues in karaf:features-generate-descriptor.

[https://github.com/opendaylight/integration-distribution/tree/master/features/singles/odl-integration-all] takes ~270 seconds to generate:

real 4m28.834s
user 3m40.287s
sys 1m23.629s

[https://github.com/opendaylight/integration-distribution/tree/master/features/repos/index] takes ~638 seconds to generate:

real 10m38.859s
user 7m55.004s
sys 3m17.269s

Running profiling shows that this time is dominated by short-lived FileInputStreams being generated at a rate of 7K-8Kps – which are coming from both feature reading and from artifact resolution.



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