Inconsistent topic subscription.
Hello,
I have a question about topic subscription.
There are 3 nodes named camera_driver,tracker and estimator.
The tracker sends a std_msg/float32 topic message only once to the estimator when it completes its initialization.
The camera_driver keeps publishing image msg.
If I run nodes in order tracker -> estimator -> camera_driver then estimator is able to subscribe the std_msg/float32 type message.
However, when I execute camera_driver->tracker->estimator order, the estimator can't subscribe any topic.
Furthermore, "rostopic echo" can subscribe the message in the latter case.
I am using groovy on 12.04 Ubuntu 64bits.
Is there anyone faced similar symptom?
Cheers.