[ https://issues.jboss.org/browse/JGRP-1802?page=com.atlassian.jira.plugin.... ] Richard Achmatowicz commented on JGRP-1802: ------------------------------------------- Looking over the code in checkReceivedMessages, it seems there is a mixup in which receivers are used to check message arrival. In the setup for the test, you define three receivers ra, rb, rc. But in checkReceivedMessages(), you send the messages and then create three receivers which are used to check message receipt: {noformat} private void sendAndCheckMessages(int num_msgs, JChannel ... channels) throws Exception { ra.clear(); rb.clear(); rc.clear(); // 1. send unicast messages Set<Address> mbrs=new HashSet<Address>(channels.length); for(JChannel ch: channels) mbrs.add(ch.getAddress()); for(JChannel ch: channels) { Address addr=ch.getAddress(); for(Address dest: mbrs) { for(int i=1; i <= num_msgs; i++) { ch.send(dest, "unicast msg #" + i + " from " + addr); } } } int total_msgs=num_msgs * channels.length; MyReceiver[] receivers=new MyReceiver[channels.length]; for(int i=0; i < channels.length; i++) receivers[i]=(MyReceiver)channels[i].getReceiver(); checkReceivedMessages(total_msgs, receivers); } {noformat} Isn't it possible that messages will be received by channels before these receivers are installed? Would this not be safer? {noformat} private void sendAndCheckMessages(int num_msgs, JChannel ... channels) throws Exception { ra.clear(); rb.clear(); rc.clear(); // send unicast messages Set<Address> mbrs=new HashSet<Address>(channels.length); for(JChannel ch: channels) mbrs.add(ch.getAddress()); for(JChannel ch: channels) { Address addr=ch.getAddress(); for(Address dest: mbrs) { for(int i=1; i <= num_msgs; i++) { ch.send(dest, "unicast msg #" + i + " from " + addr); } } } // check unicast message arrival int total_msgs=num_msgs * channels.length; checkReceivedMessages(total_msgs, ra,rb,rc); } {noformat} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira