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Fix slow loading of spawned model with plugins #3126

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merged 8 commits into from
Oct 25, 2021

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As reported in #3125, since #3121 was recently merged I have noticed a problem with some models that are slow to load. Specifically, if a model is spawned that contains a sensor plugin that is slow to load, it is possible that model plugins will fail to load, with the following error message:

[Err] [Model.cc:1061] Sensors failed to initialize when loading model[...] via the factory mechanism. Plugins for the model will not be loaded.

I believe this is caused by this logic in Model::LoadPlugins that skips loading of model plugins if the sensors take longer than 5 seconds to initialize, which includes the time required to load sensor plugins. I have increased this timeout to 50 seconds in 2589d13, though I am open to suggestions for how to make this a configurable parameter.

I have added a regression test that loads a world file along with two test plugins to reproduce the failure. The world has a WorldSpawnModelPlugin that spawns a model that has a single box with a camera sensor using the SlowLoadingSensorPlugin and the InitialVelocityPlugin as a model plugin. The box should be given an initial velocity after loading.

Since gazebosim#3121 was merged, some problems have been observed
with loading model plugins if a model contains sensor
plugins that are slow to load. This introduces two
test plugins and a test world to demonstrate the problem.

Signed-off-by: Steve Peters <scpeters@openrobotics.org>
Signed-off-by: Steve Peters <scpeters@openrobotics.org>
Increase the timeout from 5 seconds to 50 seconds.

Signed-off-by: Steve Peters <scpeters@openrobotics.org>
Signed-off-by: Steve Peters <scpeters@openrobotics.org>
Signed-off-by: Steve Peters <scpeters@openrobotics.org>
Signed-off-by: Steve Peters <scpeters@openrobotics.org>
@scpeters scpeters requested a review from iche033 October 22, 2021 02:30
@scpeters scpeters changed the title Slow loading model spawn Fix slow loading of spawned model with plugins Oct 22, 2021
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I am open to suggestions for how to make this a configurable parameter.

I suppose we could add an SDFormat world parameter?

Rather than increase the timeout to a larger fixed value,
this adds an SDFormat parameter to the world element
in the ignition xml namespace. It restores the default
timeout of 5 seconds and sets a timeout of 30 seconds
in the test world.

Signed-off-by: Steve Peters <scpeters@openrobotics.org>
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I am open to suggestions for how to make this a configurable parameter.

I've added an SDFormat parameter in the ignition xml namespace in 35fb921 and restored the default timeout to 5 seconds

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The changes LGTM.

I would consider increasing the default timeout if you think users are more likely to run into the issue after updating Gazebo.

Signed-off-by: Steve Peters <scpeters@openrobotics.org>
@scpeters scpeters merged commit d60cef0 into gazebosim:gazebo11 Oct 25, 2021
@scpeters scpeters deleted the slow_loading_model_spawn branch October 25, 2021 22:59
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2 participants