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Copy d_domain before iterating 

Prevents a bug where the thread can crash due to a change in the
d_domain object while running the for loop. By copying and iterating
over the copy, this becomes safer.
This commit is contained in:
Joshua Boniface 2020-09-16 15:02:31 -04:00
parent 973c78b8e0
commit 9366977fe6
1 changed files with 3 additions and 1 deletions
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4
node-daemon/pvcnoded/Daemon.py
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@ -1326,7 +1326,9 @@ def collect_vm_stats(queue):
# Toggle state management of dead VMs to restart them # Toggle state management of dead VMs to restart them
if debug: if debug:
logger.out("Toggle state management of dead VMs to restart them", state='d', prefix='vm-thread') logger.out("Toggle state management of dead VMs to restart them", state='d', prefix='vm-thread')
for domain, instance in this_node.d_domain.items(): # Make a copy of the d_domain; if not, and it changes in flight, this can fail
fixed_d_domain = this_node.d_domain.copy()
for domain, instance in fixed_d_domain.items():
if domain in this_node.domain_list: if domain in this_node.domain_list:
# Add the allocated memory to our memalloc value # Add the allocated memory to our memalloc value
memalloc += instance.getmemory() memalloc += instance.getmemory()