jndi lookups fail (under load)

[mlange]

Problem: many clients to try lookup a session bean concurrently. If the client count reaches a certain number, the lookup fails with:

[java] javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out]
[java] at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1119)
[java] at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1196)
[java] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:516)
[java] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:509)
[java] at javax.naming.InitialContext.lookup(InitialContext.java:347)

Setting the "backlog" param of the naming service to a higher value does not have any effect.

Is there any workaround to avoid this? Otherwise it is not possible to access EJBs from many clients.

Thanks,

marek

[darranl]

How many clients do you have?

[mlange]

The error seems to occur when more than 20 clients access the server.

[ibudhou]

Hi
colud you solve the problem? I am also having the same problem.
If its done , pls advise solution.

[chuckharris]

I am getting the same exception while experimenting with the sun ejb tutorial. I get the error with 14+ clients. Did you find a solution?
javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive
timed out]
at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1119)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1196)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:516)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:509)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at ejb.stateless.ConverterClient.run(Unknown Source)
at java.lang.Thread.run(Thread.java:534)
Caused by: java.net.SocketTimeoutException: Receive timed out
at java.net.PlainDatagramSocketImpl.peekData(Native Method)
at java.net.DatagramSocket.receive(DatagramSocket.java:661)
at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1089)
... 6 more