merlimat commented on a change in pull request #12181:
URL: https://github.com/apache/pulsar/pull/12181#discussion_r718811926



##########
File path: 
pulsar-client/src/main/java/org/apache/pulsar/client/impl/ProducerImpl.java
##########
@@ -1790,9 +1796,15 @@ private void batchMessageAndSend() {
                 }
             } catch (PulsarClientException e) {
                 Thread.currentThread().interrupt();
-                semaphore.ifPresent(s -> 
s.release(batchMessageContainer.getNumMessagesInBatch()));
+                semaphore.ifPresent(s -> s.release(Math.min(
+                        maxPermits - s.availablePermits(),
+                        batchMessageContainer.getNumMessagesInBatch()))

Review comment:
       So, it's actually preferable to have an exception that identifies that 
we have an issue (provided that we can restart from there) rather than just 
masking the problem. That is, until a proper solution for the root cause is 
implemented.




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