Is jgroup using checksum to become reliable on UDP?

Question

I try to understand how jgroup realized reliable multicast. I've read the manual and learned that they are using negative acks. But what happens when a cluster-member receives a corrupted message? I can't find anything about that in the official manual. ( http://www.jgroups.org/manual/html_single/index.html#d0e5392 )

Does somebody know if they are using checksums for the UDP-Header plus the data? Does the reveiver will request retransmission in that case?

Answer 1

UDP已经执行了标头和数据校验和，因此内核网络堆栈将丢弃错误的数据报，而不会将其传送到用户空间应用程序。