Github user aledsage commented on a diff in the pull request:
https://github.com/apache/brooklyn-docs/pull/98#discussion_r73409488
--- Diff: guide/ops/locations/_AWS.md ---
@@ -111,3 +125,15 @@ You can then deploy blueprints to the subnet, allowing
VPC hardware instance typ
by specifying the subnet ID as the `networkName` in your YAML blueprint.
This is covered in the previous section, "Using Subnets".
+
+### Tidying up after jclouds
+
+Security groups are not always deleted by jclouds. This is due to a
limitation in AWS (see
+https://issues.apache.org/jira/browse/JCLOUDS-207). In brief, AWS prevents
the security group
+being deleted until there are no VMs using it. However, there is eventual
consistency for
+recording which VMs still reference those security groups: after deleting
the VM, it can sometimes
+take several minutes before the security group can be deleted. jclouds
retries for 3 seconds, but
--- End diff --
Not sure I follow this rewording - I prefer the original. It is AWS's use
of eventual consistency that causes the problem (rather than immediate
consistency) - hence saying "However" rather than "Whilst there is eventual
consistency...".
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