38b882d97d
when two clients come for functions where check_default_vpc is present then one goes to create default vpc and other fails. it fails because vpc with is_default flag is already in DB but children objects (like subnets) are not yet created. For we will lock check_default_vpc function. Another way is to rework _create_vpc. It can create VPC without is_default flag. And at the end it can set the flag. First thread will pass this. And second thread will fail at flag set operation and will revert all created object. Then second thread can check presence of default VPC again. This way is better cause it can work across several controllers. Change-Id: I5586fa234257b72721e328a9fa2375a56d1553c2 |
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