kpatelatwork commented on a change in pull request #10549:
URL: https://github.com/apache/kafka/pull/10549#discussion_r615310932
##########
File path:
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/isolation/DelegatingClassLoader.java
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@@ -187,17 +192,24 @@ private static PluginClassLoader newPluginClassLoader(
);
}
- private <T> void addPlugins(Collection<PluginDesc<T>> plugins, ClassLoader
loader) {
+ //visible for testing
+ <T> void addPlugins(Collection<PluginDesc<T>> plugins, ClassLoader loader)
{
for (PluginDesc<T> plugin : plugins) {
String pluginClassName = plugin.className();
SortedMap<PluginDesc<?>, ClassLoader> inner =
pluginLoaders.get(pluginClassName);
+ boolean pluginConflict = false;
if (inner == null) {
inner = new TreeMap<>();
pluginLoaders.put(pluginClassName, inner);
// TODO: once versioning is enabled this line should be moved
outside this if branch
log.info("Added plugin '{}'", pluginClassName);
+ } else {
+ pluginConflict = true;
}
inner.put(plugin, loader);
+ if (pluginConflict) {
+ log.error("Detected multiple copies of plugin '{}', one of
these will be used '{}'", pluginClassName, inner.keySet());
+ }
Review comment:
I had discussed that case with Randall and you are right detecting and
logging only once would need the change to inspect the map after all plugins
are loaded which complicates the code. This is why it's ok to see the same
statement twice as it would be rare for someone to have 3 copies of the same
plugin.
sure let me make the change to log which one will be used as of the time
when the statement is logged.
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