when execute dwSensorCamera_readFrame api, the result is always TIMEOUT

My port ab of px2 have four camera, when execute dwSensorCamera_readFrame api, a long time it works well, but once TIMEOUT, it will always TIMEOUT, who can tell me the reasons ? thanks.

driveworks version: 1.2

camera type: gmsl

Dear cuidiabing,
DW_TIME_OUT in return status indicates no frame is able to be acquired within given time interval.
Do you see this issue with any of the shipped sample? If so, please let us know how to reproduce it.

It is probabilistic, it may appear for two hours in a row, or may be longer. However, once it appears, it will always be time_out, It is normal after restarting.