java.rmi.ConnectIOException: error during JRMP connection establishment;

Throwing following expection when doing RMI call. Exception trace is given
below. This is happening in solaris platform(2GB RAM and 4GB swap), heap
size allocated to JVM 768MB(also tried 1024 MB). Also java version used is
jre 1.5_06. Same problem does not occur when I tested same code in Solaris
machine with 16GB RAM and 16 GB swap. Can any one of you please help me out
for resolving this issue.

========================================
 java.rmi.ConnectIOException: error during JRMP connection establishment;
nested exception is:

 java.net.SocketTimeoutException: Read timed out
 at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
 at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
 at sun.rmi.server.UnicastRef.invoke(Unknown Source)
 at com.adventnet.nms.topodb.TopoDB_Stub.getObjects(Unknown Source)
 at
com.infinera.nm.ems.server.discovery.EMSDBUtils.retrieveObjectsWithRelationS
hips(EMSDBUtils.java:536)

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