[jboss-jira] [JBoss JIRA] (JBNAME-51) Delay in connecting when first of multiple providers is down can cause performance issue

[Dennis Reed (JIRA)]

     [ https://issues.jboss.org/browse/JBNAME-51?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dennis Reed updated JBNAME-51:
------------------------------

    Fix Version/s: 5.0.3 CP01
                   5.0.6.GA

    
> Delay in connecting when first of multiple providers is down can cause performance issue
> ----------------------------------------------------------------------------------------
>
>                 Key: JBNAME-51
>                 URL: https://issues.jboss.org/browse/JBNAME-51
>             Project: JBoss Naming
>          Issue Type: Bug
>          Components: jnpserver
>    Affects Versions:  5.0.3.GA
>            Reporter: Dennis Reed
>            Assignee: Dennis Reed
>             Fix For: 6.0.0.Beta1, 5.0.3 CP01, 5.0.6.GA
>
>         Attachments: JBNAME-51.diff
>
>
> org.jnp.interfaces.NamingContext.checkRef always loops through the provider list in order,
> trying to connect to the first before checking for a cached connection to a later provider.
> This affects performance because it can cause a delay on every context created, waiting for a timeout on a node that is down.
> For instance, the following takes a very long time when node1 is down.
>     ...
>     env.put ( Context.PROVIDER_URL, "node1:1100,node2:1100" );
>     for ( int i = 0; i < 1000; ++ i ) {
>         InitialContext ctx = new InitialContext ( env );
>         ...
>     }
> If checkRef looked for a cached connection to any of the listed providers before trying to connect to an uncached one,
> there would only be a timeout delay on the very first connection attempt.

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