[buildtool] ERROR hint: planning-gpu-dev have been occupied

[hkyee]

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System information

• OS Platform and Distribution (e.g., Linux Ubuntu 18.04): Ubuntu 20.04
• Apollo installed from (source or binary): Using Package Method
• Apollo version (3.5, 5.0, 5.5, 6.0): Apollo 8.0
• Output of apollo.sh config if on master branch:

Steps to reproduce the issue:

• Please use bullet points and include as much details as possible:
• aem start_gpu
• aem enter
• buildtool build --gpu

Supporting materials (screenshots, command lines, code/script snippets):

[buildtool] INFO Import depends... [buildtool] INFO Preprocess planning-gpu-dev [buildtool] ERROR Encounter ErrCode.OccupiedErr [buildtool] ERROR hint: planning-gpu-dev have been occupied [buildtool] ERROR solution: If you really need this package, add or Modify 'src_path' attribute in depend label to fix this issue. [buildtool] INFO apollo build tool exit.

May I know what does this mean?