test: fix test-tls-ticket-cluster.js
Problem
I've investigated the related issue in depth and found out that this test sometimes fails because of the handshake process. When the error happens and I look at the Wireshark logs, I see that the client doesn't send a Change Cipher Spec packet, but instead sends a FIN packet after a while. The FIN packet is sent in approximately 10ms. This may be some timeout, but I wasn't able to find proof for that.
I've added 2 screenshots from the Wireshark logs (which I can provide too if requested). The first one shows the expected packet flow when the test passes, and the second one shows the packet flow when the test fails.
Pass:
Failure:
As can be seen, the Change Cipher Spec packet was missing, and the FIN packet had already been sent before the handshake was complete.
I've seen discussions about the issues in the handshake process of Node.js in the following links: https://github.com/openssl/openssl/issues/8069, https://github.com/openssl/openssl/issues/7199, https://github.com/nodejs/node/issues/18770.
As I don't have in-depth knowledge about OpenSSL, I'm not sure if this issue is caused by the way OpenSSL is used by Node. If there is a need to investigate it, a new issue can be opened.
Fix
In this PR, I’ve made the Primary (client) wait for the FIN packet from the Worker (server) to close the connection. This approach ensures that the Primary waits until it receives a FIN packet from the Worker and doesn’t time out during the handshake. I've run the test with the fix roughly 11k times and it hasn't failed once. Without the fix, I would usually get a failure with 1k runs easily.