Pluggable monitor fix and refactor #1482
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Many methods had the stateLock held for the entire scope of the function call but the 'port_closed' message can be received at any moment, asyncronously, and it requires a stateLock as well. In this case the worst case is that the decode loop is blocked for 10 seconds until the timeout occurs, but this is not ideal. This bug has been fixed by removing the state, since it's not really useful.
silvanocerza
reviewed
Oct 1, 2021
silvanocerza
reviewed
Oct 1, 2021
silvanocerza
approved these changes
Oct 1, 2021
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UPGRADING.mdhas been updated with a migration guide (for breaking changes)What kind of change does this PR introduce?
Fixed a race condition in the pluggable monitor client due to a stateLock contention:
Close) had the stateLock held for the entire scope of the function"port_closed"message can be received at any moment in the decode loop, and it requires a stateLock as well, but it may be blocked until theClosefunction get theclosemessage (that may happen later in the decodeLoop)In this case the worst case scenario is that the decode loop is blocked for 10 seconds until the timeout occurs and
Closeexits, but this is not ideal. This bug has been fixed by removing thestatefrom the pluggable monitor client, since it's not really useful in any case.titled accordingly?
No
Some other refactorings have been made in the same PR to simplify and make error handling and logging more coherent.