clebertsuconic commented on code in PR #4972:
URL: https://github.com/apache/activemq-artemis/pull/4972#discussion_r1644812334
##########
artemis-server/src/main/java/org/apache/activemq/artemis/core/postoffice/impl/SimpleAddressManager.java:
##########
@@ -100,6 +104,11 @@ public boolean addBinding(final Binding binding) throws
Exception {
if (nameMap.putIfAbsent(binding.getUniqueName(), bindingAddressPair) !=
null) {
throw ActiveMQMessageBundle.BUNDLE.bindingAlreadyExists(binding);
}
+ directBindingMap.compute(binding.getAddress(), (key, value) -> {
+ Collection<Binding> bindingList = value == null ? new ArrayList<>() :
value;
+ bindingList.add(binding);
Review Comment:
Maybe I'm being naive... but as far as I remember.. the ArrayList itself is
not supposed to be used from multiple threads.
The compute will do a replay, but you could still call the compute from
multiple threads.
I feel like you should have:
```
synchronized(bindingList) {
bindingsList.add(binding);
}
```
Or another data structure to be used here.
similarly on the remove the queue, it should use a synchronized or use a
concurrent equivalent.
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