LightWeight http wagon not thread-safe
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Key: WAGON-346
URL: https://jira.codehaus.org/browse/WAGON-346
Project: Maven Wagon
Issue Type: Bug
Components: wagon-http-lightweight
Affects Versions: 1.0
Environment: maven 3 with Aether
Reporter: nicolas de loof
Aether (maven3) by default parallelized metadata resolution on 4 threads
(aether.metadataResolver.threads) and artifacts downloading on 5
(maven.artifact.threads).
In such context, Wagon is not used sequentially.
LightWeightHttpWagon is designed for mono-thread, sequential usage. It rely on
system properties and on setting/resetting java.net.Authenticator singleton.
The result is that, in some cases (typically : when settings defines many
repositories with various credentials), credentials may not apply and download
will fail
A potential fix is
- to use Java5 URL.openConnection(Proxy) instead of using system properties
- to use a shared, singleton java.net.Authenticator that lookup repositories to
match the requested URL
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