zbentley commented on code in PR #87:
URL: 
https://github.com/apache/pulsar-client-python/pull/87#discussion_r1093518373


##########
src/producer.cc:
##########
@@ -34,6 +34,16 @@ MessageId Producer_send(Producer& producer, const Message& 
message) {
     return messageId;
 }
 
+void Producer_sendAsync(Producer& producer, const Message& msg, SendCallback 
callback) {
+    Py_BEGIN_ALLOW_THREADS
+    producer.sendAsync(msg, callback);
+    Py_END_ALLOW_THREADS
+
+    if (PyErr_CheckSignals() == -1) {

Review Comment:
   Sure. Something I've seen before is issues around an error already being 
"pre-raise" in a Python thread when some external code (the pulsar client C++ 
in this case) decides to invoke an unrelated Python callback. Does pybind 
handle situations like [this 
one](https://github.com/apache/pulsar/pull/16535/files#diff-b9b1b59dde469b15de56c46d20ae54d82e01a7a607ef4bf6f2d759807e5bfd79R119)?



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