ros2 bag play error on windows foxy - [rosbag2_transport]: Failed to play: cannot get file size

[karthiknit1]

Description

when there is only rosbag2_2021_09_27-09_11_59.db3 file and no metadata.yaml file, when I tried to play the bag file using the command "ros2 bag play rosbag2_2021_09_27-09_11_59.db3", the following error is encountered in ROS 2 Foxy terminal on windows.

[ERROR] [1652675142.815790900] [rosbag2_transport]: Failed to play: cannot get file size: The file pointer cannot be set on the specified device or file.

Expected Behavior

Bag file should be played successfully.

Actual Behavior

ros2 bag play rosbag2_2021_09_27-09_11_59.db3 ros2 bag info rosbag2_2021_09_27-09_11_59.db3 Both the above commands are leading to the below error on windows only: [ERROR] [1652675142.815790900] [rosbag2_transport]: Failed to play: cannot get file size: The file pointer cannot be set on the specified device or file.

To Reproduce

** Steps to reproduce the behavior, e.g.

1. record a bag file.(around 8GB) in ROS 2 Foxy terminal.
2. play the bag using "ros2 bag play bagFileName". Here instead of bag folder, provide bag file name(.db3)

System (please complete the following information)

• OS: Windows
• ROS 2 Distro: Foxy
• Version: Installed binary of latest Foxy

Additional context

** Add any other context about the problem here **

[karthiknit1]

Any update on this issue? This seems to be most recurring problem on win64 for large ros2 bags.

[MichaelOrlov]

What behavior if specify folder with .db3 file and metadata.yaml file? for ros2 bag play command? For the same recorded .db3 file. Also does this issue still reproduces for ROS2 Rolling distro?

[karthiknit1]

Hello Michael,

If I specify folder, I do not see any issue. But this issue with file path instead of folder path exists in ros2 Humble distro as well (issue seen in windows). I didn't get chance to check it on Rolling distro.

The reason for providing file path is to read the splitted bag files (if any) recorded in a bag folder.

Thanks, Karthik Reddy

[MichaelOrlov]

Preliminary analysis: Exception with rrror message "cannot get file size: The file pointer cannot be set on the specified device or file." coming from https://github.com/ros2/rosbag2/blob/197b09481a167d7fe9414c23945a778288f44a62/rosbag2_storage_default_plugins/src/rosbag2_storage_default_plugins/sqlite/sqlite_storage.cpp#L204-L209 Which is called from https://github.com/ros2/rosbag2/blob/197b09481a167d7fe9414c23945a778288f44a62/rosbag2_storage_default_plugins/src/rosbag2_storage_default_plugins/sqlite/sqlite_storage.cpp#L357 get_relative_file_path() pointing to the relative_path_ which is assigned to the uri during calling open(..) method. And if I am not mistaken this uri is the same as provided in CLI.

[MichaelOrlov]

It seems relative_path_ should have a valid value since we checking it for existence and even opening database file in open(..) method https://github.com/ros2/rosbag2/blob/197b09481a167d7fe9414c23945a778288f44a62/rosbag2_storage_default_plugins/src/rosbag2_storage_default_plugins/sqlite/sqlite_storage.cpp#L89-L99 We calling storage_->get_metadata(); when storage already has been opened in fabric method https://github.com/ros2/rosbag2/blob/197b09481a167d7fe9414c23945a778288f44a62/rosbag2_cpp/src/rosbag2_cpp/readers/sequential_reader.cpp#L104-L110

Conclusion: It looks like problem in underlying implementation of the rcpputils::fs::path::file_size() from ros2/rcpputils/src/filesystem_helper.cpp in particularly for Windows platform. Need to check some relevant issues for this particular function.

[MichaelOrlov]

Closing this issue since the are nothing to fix in rosbag2. This is underlying issue in rcpputils package.
Feel free to re-open if disagree.