rospack cannot find package every-time terminal restarted

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I have two packages one name test_package (built first) and one name cylinder(later). I found that every time I start a new terminal or restart the terminal, I have to source the setup.bash again for cylinder package otherwise it is not found. For every terminal, I need to source before running rosrun cylinder xxx. The test_package worked fine. I wonder if is there a solution, shall I just try rebuild this package again, I don't know whether rebuilding work or not though... Has anyone else experienced this before?