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Fix epoch refresh of uncommitted safe tail #744

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merged 1 commit into from
Sep 13, 2022
Merged

Fix epoch refresh of uncommitted safe tail #744

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8 changes: 5 additions & 3 deletions cs/src/core/FasterLog/FasterLog.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -1521,18 +1521,20 @@ private void EpochProtectAutoRefreshSafeTailAddressRunner()

private void AutoRefreshSafeTailAddressRunner(bool recurse)
{
long tail = 0;
do
{
if (TailAddress > SafeTailAddress)
tail = TailAddress;
if (tail > SafeTailAddress)
{
if (recurse)
Task.Run(EpochProtectAutoRefreshSafeTailAddressRunner);
else
epoch.BumpCurrentEpoch(() => AutoRefreshSafeTailAddressBumpCallback(TailAddress));
epoch.BumpCurrentEpoch(() => AutoRefreshSafeTailAddressBumpCallback(tail));
return;
}
_ongoingAutoRefreshSafeTailAddress = 0;
} while (TailAddress > SafeTailAddress && _ongoingAutoRefreshSafeTailAddress == 0 && Interlocked.CompareExchange(ref _ongoingAutoRefreshSafeTailAddress, 1, 0) == 0);
} while (tail > SafeTailAddress && _ongoingAutoRefreshSafeTailAddress == 0 && Interlocked.CompareExchange(ref _ongoingAutoRefreshSafeTailAddress, 1, 0) == 0);
}

private void AutoRefreshSafeTailAddressBumpCallback(long tailAddress)
Expand Down