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ros-perception / laser_filters

Assorted filters designed to operate on 2D planar laser scanners, which use the sensor_msgs/LaserScan type.
BSD 3-Clause "New" or "Revised" License
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LaserArrayFilter fails to find MultiChannelMedianFilterFloat library from filter package #109

Closed AliaChe closed 3 years ago

AliaChe commented 3 years ago

Hello,

I'm trying to test this package using ros foxy. I've got an error when using the LaserArrayFilter, which claims to not find the necessary librairies from the "filters" package.

Here is the error:

[scan_to_scan_filter_chain-13] [INFO] [1615475503.537921136] [scan_to_scan_filter_chain]: LaserArrayFilter cleaning and reallocating due to larger scan size
[scan_to_scan_filter_chain-13] [WARN] [1615475503.541828472] [pluginlib.ClassLoader]: given plugin name 'lib/libmedian' should be '/libmedian' for better portability
[scan_to_scan_filter_chain-13] [FATAL] [1615475503.542328199] [scan_to_scan_filter_chain]: Could not load library for filters/MultiChannelMedianFilterFloat: Could not find library corresponding to plugin filters/MultiChannelMedianFilterFloat. Make sure the plugin description XML file has the correct name of the library and that the library actually exists.
[ERROR] [scan_to_scan_filter_chain-13]: process has died [pid 25284, exit code -11, cmd '/home/blackdrones/blackdrones_ws/install/laser_filters/lib/laser_filters/scan_to_scan_filter_chain --ros-args --params-file /home/blackdrones/blackdrones_ws/install/blackdrones_control/share/blackdrones_control/config/params.yaml -r scan:=/laserscan/out'].
jonbinney commented 3 years ago

@hangst did you have this problem when you used laser filters on foxy?

jonbinney commented 3 years ago

Renamed for issue to be more specific. I suspect this is the solution: https://github.com/ros/filters/pull/44

@AliaChe could you cherry pick the commit from that pull request and see if it fixes the problem?

hangst commented 3 years ago

@hangst did you have this problem when you used laser filters on foxy?

Yes, I faced this issue with released version of ros/filters package.

Following the warning messages from pluginlib.ClassLoader, I managed to fix the issue by modifying default_plugins.xml, and therefore proposed PR at ros/filters#44.

AliaChe commented 3 years ago

This solved the issue. Thanks!

AliaChe commented 3 years ago

Issue solved