zentol commented on code in PR #24292:
URL: https://github.com/apache/flink/pull/24292#discussion_r1489262074
##########
flink-rpc/flink-rpc-core/src/main/java/org/apache/flink/runtime/rpc/MainThreadValidatorUtil.java:
##########
@@ -45,11 +45,13 @@ public MainThreadValidatorUtil(RpcEndpoint endpoint) {
public void enterMainThread() {
assert (endpoint.currentMainThread.compareAndSet(null,
Thread.currentThread()))
: "The RpcEndpoint has concurrent access from " +
endpoint.currentMainThread.get();
+ endpoint.beforeInvocation();
Review Comment:
Yes, because the main thread executable covers less; it doesnt capture
anything sent directly against the rpc service's executor.
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