Only load a plugin once from the classpath #11301
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LGTM |
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@s1monw what do you think about backporting this to the 1.5 branch as well? |
Today, when loading plugins from the classpath we take the enumeration given to us by the classloader and attempt to load every URL. This can cause issues as certain classloaders, such as groovy's, will return the same URL multiple times in the enumeration. When this happens, startup can fail with guice errors as bindings have already been registered. To workaround this, we create a set from the URLs returned by the classloader to provide uniqueness.
clintongormley
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Today, when loading plugins from the classpath we take the enumeration
given to us by the classloader and attempt to load every URL. This can
cause issues as certain classloaders, such as groovy's, will return the same
URL multiple times in the enumeration. When this happens, startup can fail
with guice errors as bindings have already been registered.
To workaround this, we create a set from the URLs returned by the classloader
to provide uniqueness.