[Postgres-xc-developers] Improper locking in GTM again?

[Nikhil S. <ni...@st...>]

Hi,

If I look at GTM_GetTransactionSnapshot() function, it's taking a READ
lock on GTMTransactions.gt_TransArrayLock. After taking that lock it's
modifying fields like

GTMTransactions.gt_recent_global_xmin
GTMTransactions.gt_transactions_array

Hardly READ type of behavior. This behavior particularly seems
dangerous if multiple threads modify the gt_recent_global_xmin value
above while holding read locks.

Regards,
Nikhils
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