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ovs-dpctl-top: Fix RuntimeError with resizing flow dict during iteration.

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Python does not allow modifying a dictionary or list while iterating
over the elements.  The common idom to work around this is to create
a copy of the keys or elements and then use that information to delete
the corresponding entries from the original dictionary.

This patch changes the iteration to use an intermediate copy and then
modify the original dictionary.  This avoids the associated
RuntimeError.

Reported-by: Eelco Chaudron <echaudro@redhat.com>
Reported-at: https://mail.openvswitch.org/pipermail/ovs-dev/2024-August/417000.html
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Fixes: 14b4c575c284 ("utilities: a top like tool for ovs-dpctl dump-flows.")
Signed-off-by: Aaron Conole <aconole@redhat.com>
This commit is contained in:
Aaron Conole 2024-08-30 11:20:36 -04:00
parent 0051785f00
commit 604e54fc3c
1 changed files with 1 additions and 1 deletions
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utilities/ovs-dpctl-top.in
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@ -1007,7 +1007,7 @@ class FlowDB:
def decay(self, decayTimeInSeconds):
""" Decay content. """
now = datetime.datetime.now()
for (key, value) in self._flows.items():
for (key, value) in list(self._flows.items()):
(stats_dict, updateTime) = value
delta = now - updateTime