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                                            TechVortexZ

Probabilistic exception (nullptr access to RTPSReader listener) when deleting a DataReader

> Hi @i-and, Thanks for the attached files that helped me reproduce the issue. As @JesusPoderoso said, the solution should not be avoiding the `disable()` call. > > Please, check...

When these processes start at the same time, many dropped parckets were generated by the 127.0.0.1 network

> Hi @TechVortexZ, thanks for using Fast DDS. You might consider that 20 processes and 130 topics are enough to make the network very busy so the loss can be...

When these processes start at the same time, many dropped parckets were generated by the 127.0.0.1 network

However,I noticed that the pdp message interval is not 100ms when start, I set `initial_announce_period": 100ms`,This is why? ![HPo8yc3ZdO](https://github.com/eProsima/Fast-DDS/assets/78061940/fe7dfac9-3db7-4691-9348-e84a2679b09b)

When these processes start at the same time, many dropped parckets were generated by the 127.0.0.1 network

Hi @elianalf [thanks for your reply. I set `avoiding_builtin_multicast=true` and set `udp_transport->TTL = 0;`,also enable udp and shm. As you provided the reference code, there are still lost packets. >I...

When these processes start at the same time, many dropped parckets were generated by the 127.0.0.1 network

> but every time it discovers a participant it begins sending Data(p) packages to each multicast locator and to all known participants unicast locators. So between two initialAnnouncements packages, there...