Bug report

Required Info:

• Operating System:
  • macOS 10.14
  • Ubuntu 18.04 (32bit ARM)
• Installation type:
  • binary
• Version or commit hash:
  • Eloquent patch 1
• DDS implementation:
  • rmw_cyclonedds_cpp
  • rmw_fastrtps_cpp
• Client library (if applicable):
  • rclcpp & rclpy

Steps to reproduce issue

machine A:

export RMW_IMPLEMENTATION=rmw_cyclonedds_cpp
ros2 run examples_rclcpp_minimal_client client_main

machine B:

export RMW_IMPLEMENTATION=rmw_fastrtps_cpp
ros2 run examples_rclcpp_minimal_service service_main

Expected behavior

the example works as usual:
service printing: request: 41 + 1
client printing: Result of add_two_ints: for 41 + 1 = 42

Actual behavior

service prints: request: 3249716421018666984 + 1 (numbers change between runs)
client doesn't return

Additional information

• cyclonedds<->cyclonedds service calls work
• freertps<-> freertps service calls work
• I tested on macOS locally, Ubuntu (32bit ARM) locally, and macOS to Ubuntu over wifi, results are consistent
• publish/subscribe works without issues
• rclpy versions of the examples have the same behavior