gemmellr commented on code in PR #4932:
URL: https://github.com/apache/activemq-artemis/pull/4932#discussion_r1602912035
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artemis-protocols/artemis-amqp-protocol/src/main/java/org/apache/activemq/artemis/protocol/amqp/proton/AMQPLargeMessageWriter.java:
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@@ -170,16 +170,26 @@ private void resume() {
}
private void tryDelivering() {
+
+ final Delivery localDelivery = delivery;
+ final MessageReference localReference = reference;
+ final LargeBodyReader localBodyReader = largeBodyReader;
+
+ if (localDelivery == null || localReference == null || localBodyReader
== null) {
+ logger.debug("Write got closed before tryDelivering was called");
+ return;
+ }
Review Comment:
The message writer isnt thread safe overall and isnt really expected to be.
It looks like the close method is only accessed on the connection thread, same
as the writing methods. The closed variable looks to only be volatile due to
its other uses in checking writability of the sender from other threads.
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