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 but soon we will be working on dynamically loading plugins at
runtime to improve the worker startup time so it would be a moot point to do it
that way. 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 statement is logged.
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