[
https://issues.apache.org/jira/browse/DISPATCH-1407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16925174#comment-16925174
]
Chuck Rolke commented on DISPATCH-1407:
---------------------------------------
Router policy also allows controlling clients with a maxSessions limit. This
limit is enforced differently and will not produce a memory leak.
For sessions the limit is negotiated at the AMQP level. The router has no
handlers for denying sessions because it is a protocol violation for the client
to exceed that limit. An AmqpDotnetLite client attempting to open 256 sessions
when the router limit is 2 will see:
```
Exception Amqp.AmqpException: remote channel 2 is above negotiated channel_max
1.
at Amqp.Connection.ThrowIfClosed(String operation)
at Amqp.Connection.AddSession(Session session)
at Amqp.Session..ctor(Connection connection, Begin begin, OnBegin onBegin)
at Amqp.Session..ctor(Connection connection)
at Examples.Interop.SessionHammer.Main(String[] args) in
/home/chug/Downloads/amq-dotnet-2.5.0-core-sdk/examples/Interop.SessionHammer/Interop.SessionHammer.cs:line
54.
```
> Memory leak on link policy denial
> ---------------------------------
>
> Key: DISPATCH-1407
> URL: https://issues.apache.org/jira/browse/DISPATCH-1407
> Project: Qpid Dispatch
> Issue Type: Bug
> Components: Policy Engine
> Affects Versions: 1.8.0
> Reporter: Chuck Rolke
> Assignee: Chuck Rolke
> Priority: Major
> Attachments: A.conf, default.json
>
>
> A router with a simple policy that denies most addresses starts and uses 10M
> bytes of memory. A test client loops 25k times opening a link to a denied
> address over a single connection and session. Now the router uses 276 Mbytes.
> An example policy is
> ```
> [
> ["vhost", {
> "hostname": "$default",
> "allowUnknownUser": true,
> "groups" : {
> "$default": {
> "remoteHosts": "*",
> "allowDynamicSource": true,
> "allowAnonymousSender": true,
> "sources": "$management, examples, q1",
> "targets": "$management, examples, q1"
> }
> }
> }]
> ]
> ```
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