[VOL-4259] OpenOnuAdapter Flow/GemPort removal deadlock if both start concurrently - OpenCORD JIRA

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Type: Bug
Status: Resolved (View Workflow)
Priority: Medium
Resolution: Fixed
Affects Version/s: VOLTHA v2.8, VOLTHA v2.9
Fix Version/s: VOLTHA v2.8, VOLTHA v2.9
Component/s: openonu-adapter
Labels:
None
Environment:

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Detected in regression e.g. here (sporadic effect):

https://jenkins.opencord.org/view/All%20Jobs/job/periodic-voltha-multiple-olts-openonu-go-test-bbsim-2.8/25/

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Detected in regression e.g. here (sporadic effect): https://jenkins.opencord.org/view/All%20Jobs/job/periodic-voltha-multiple-olts-openonu-go-test-bbsim-2.8/25/

Story Points:
2
Epic Link:
OpenONU Adapter in Golang

Description

TechProfile (removal) configuration and VlanConfigFsm flow removal processing may still run into some deadlock situation, when started nearly at the same time.

TechProfile may lock mutexTpState and and with call to VlanConfigFsm::IsFlowRemovePending() may wait for VlanConfigFsm::mutexFlowParams.

In between VlanConfigFsm::RemoveUniFlowParams() takes VlanConfigFsm::mutexFlowParams and with call to Techprofile::setProfileToDelete() may wait for (above locked) mutexTpState.