Is it possible to control the number of retries on Naming.lo

[varunrupela]

Currently, org.jnp.interfaces.NamingContext caches NamingServerStubs and retries the Naming.lookup() call MAX_RETRIES number of times. MAX_RETRIES is set to 10 as part of its declaration and is non-configurable as far as I know.

Is there a way to control the number of retries made by org.jnp.interfaces.NamingContext.lookup() when the Naming.lookup() call fails?

Following is a brief description of the scenario when this would be useful (to me anyway):

- A plain old java object tries to lookup a remote ejb using org.jnp.NamingContextFactory as its JNDI service provider.
- It succeeds the first time. Which means that a NamingServerStub for the remote machine has been cached by org.jnp.interfaces.NamingContext.
- Unplug the remote machines network cable.
- Try to lookup the same ejb again. An exception is thrown from the NamingContext after 10 retires for lookup(). This takes 3-4 minutes.
- I need to reduce that length of time.
- Is there a way that can be done by configuring some properties?
- Other options would be to manage the connection timout myself via threads or direct tcp/ip calls. Is there another option?

Thanks.

Varun Rupela.

[genman]

1) Download the JBoss CVS source, modify src/main/org/jnp/interfaces/NamingContext.java. You can get the source via sourceforge, do:

cvs co -r Branch_3_2 jboss-3.2

Suggestion: Add a system property, "jnp.connectRetries", which overrides the default, hard-coded value.

2) Build and test.

3) Submit a patch via sourceforge. I, or somebody else will apply it for the next release.

You can also modify MAX_RETRIES, as it is a static integer.

org.jnp.interfaces.NamingContext.MAX_RETRIES = 1;

[varunrupela]

Elias:

Thanks for you reply.

Changing the value of MAX_RETRIES helped a lot.

I do have a related question:

Is there an RMI property with which we can control the timeout on the lookup call?

Thanks very much.

Varun.

[genman]

I think the source might be helpful, you can track it down using CVS or download anonymously. I don't have it on this machine, but there are a few I/O settings you can play with.