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From "Li, Yuliang" <...@ndsuk.com>
Subject jre1.6.0_02 don't support Lateral UDP Discovery
Date Wed, 14 May 2008 14:05:55 GMT
Hi all:
As a new people for JCS, I tried a Lateral TCP Cache and Lateral UDP
Discovery. And I have got a very interesting result.

This is the testing environment:
I created a server and a client (on the same machine). Server provides
the function for user to create objects through the command line. The
object will be saved to the disk (block disk cache) and also be
distributed to the client by using the TCP lateral cache. The client is
running on jre1.6.0_05. The server will be running on different versions
of JRE (jre1.6.0_02, jre1.6.0_03, and jre1.6.0_05).

I tried the Lateral TCP Cache first. No problem at all! The objects
created from the server will be automatically cached to the client. 

Then I tried the Lateral UDP Discovery. If the server is running on
jre1.6.0_03 or jre1.6.0_05, there is no problem. But if the server is
running on jre1.6.0_02, the objects can not be distributed to the

The logging results are below:
14-May-2008 14:47:38
org.apache.jcs.auxiliary.lateral.socket.tcp.LateralTCPSender init
INFO: Attempting connection to [UKDTLIY.UK.NDS.COM]
14-May-2008 14:47:43
org.apache.jcs.auxiliary.lateral.socket.tcp.LateralTCPService <init>
SEVERE: Could not create sender to [] -- Socket is
null, cannot connect to
14-May-2008 14:47:43
SEVERE: Can't fix Socket is null, cannot connect to
14-May-2008 14:47:43
org.apache.jcs.auxiliary.lateral.LateralCacheRestore canFix
SEVERE: Can't fix Can't fix Socket is null, cannot connect to
14-May-2008 14:48:03
org.apache.jcs.auxiliary.lateral.LateralCacheMonitor run
INFO: LateralCacheManager.instances.size() = 1
14-May-2008 14:48:03
org.apache.jcs.auxiliary.lateral.LateralCacheMonitor run
 1- mgr.getCaches().size() = 2
14-May-2008 14:48:03
org.apache.jcs.auxiliary.lateral.LateralCacheMonitor run
INFO: found LateralCacheNoWait in error,  LateralCacheNoWait  Status = 3
cache = [
 Cache Name [DogCache]
 cattr =  []]

It looks that the server cannot build the TCP connection.
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