zhan xuguang created JGRP-1533: ---------------------------------- Summary: Two JGoup Server can't communicate each other with multicast Key: JGRP-1533 URL: https://issues.jboss.org/browse/JGRP-1533 Project: JGroups Issue Type: Feature Request Affects Versions: 2.6.12 Environment: jgroups-all-2.6.12.jar cat /proc/version Linux version 2.6.18-128.el5 (mockbuild(a)builder10.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)) #1 SMP Wed Jan 21 10:41:14 EST 2009 Reporter: zhan xuguang Assignee: Bela Ban precondtion we have two server Ip1 and Ip2 as a cluster , we used JGOUP as the sync cache channel. these days we find it not workable as it not sync data with config: to enable multi-machine synchronization, set the following to true we are multicasting on 235.11.17.19 port 32765. For information about <jgroupsInit> <![CDATA[ UDP(mcast_addr=239.190.1.1;mcast_port=32986;discard_incompatible_packets=true;enable_diagnostics=false; bind_addr=ip1; max_bundle_size=60000;max_bundle_timeout=30;ip_ttl=32;enable_bundling=true; use_concurrent_stack=true;thread_pool.enabled=true;thread_pool.min_threads=1; thread_pool.max_threads=25;thread_pool.keep_alive_time=5000; thread_pool.queue_enabled=false;thread_pool.queue_max_size=100; thread_pool.rejection_policy=Run;oob_thread_pool.enabled=true;oob_thread_pool.min_threads=1; oob_thread_pool.max_threads=8;oob_thread_pool.keep_alive_time=5000;oob_thread_pool.queue_enabled=false; oob_thread_pool.queue_max_size=100;oob_thread_pool.rejection_policy=Run): PING(timeout=2000;num_initial_members=3): MERGE2(max_interval=30000;min_interval=10000): FD_SOCK:FD(timeout=10000;max_tries=5;shun=true): VERIFY_SUSPECT(timeout=1500): pbcast.NAKACK(use_mcast_xmit=false;gc_lag=0;retransmit_timeout=300,600,1200,2400,4800;discard_delivered_msgs=true): UNICAST(timeout=300,600,1200,2400,3600): pbcast.STABLE(stability_delay=1000;desired_avg_gossip=50000;max_bytes=400000): pbcast.GMS(print_local_addr=true;join_timeout=3000;shun=false;view_bundling=true): FC(max_credits=20000000;min_threshold=0.10): FRAG2(frag_size=60000):pbcast.STATE_TRANSFER ]]> </jgroupsInit> another server same config <jgroupsInit> <![CDATA[ UDP(mcast_addr=239.190.1.1;mcast_port=32986;discard_incompatible_packets=true;enable_diagnostics=false; bind_addr=ip2; max_bundle_size=60000;max_bundle_timeout=30;ip_ttl=32;enable_bundling=true; use_concurrent_stack=true;thread_pool.enabled=true;thread_pool.min_threads=1; thread_pool.max_threads=25;thread_pool.keep_alive_time=5000; thread_pool.queue_enabled=false;thread_pool.queue_max_size=100; thread_pool.rejection_policy=Run;oob_thread_pool.enabled=true;oob_thread_pool.min_threads=1; oob_thread_pool.max_threads=8;oob_thread_pool.keep_alive_time=5000;oob_thread_pool.queue_enabled=false; oob_thread_pool.queue_max_size=100;oob_thread_pool.rejection_policy=Run): PING(timeout=2000;num_initial_members=3): MERGE2(max_interval=30000;min_interval=10000): FD_SOCK:FD(timeout=10000;max_tries=5;shun=true): VERIFY_SUSPECT(timeout=1500): pbcast.NAKACK(use_mcast_xmit=false;gc_lag=0;retransmit_timeout=300,600,1200,2400,4800;discard_delivered_msgs=true): UNICAST(timeout=300,600,1200,2400,3600): pbcast.STABLE(stability_delay=1000;desired_avg_gossip=50000;max_bytes=400000): pbcast.GMS(print_local_addr=true;join_timeout=3000;shun=false;view_bundling=true): FC(max_credits=20000000;min_threshold=0.10): FRAG2(frag_size=60000):pbcast.STATE_TRANSFER ]]> </jgroupsInit> and we use the test programe test find no message receive at ip2 run at ip1 java -cp jgroups-all-2.6.12.jar org.jgroups.tests.McastSenderTest -mcast_addr 239.190.1.1 -port 32986 run at ip2 java -cp jgroups-all-2.6.12.jar org.jgroups.tests.McastReceiverTest -mcast_addr 239.190.1.1 -port 32986 we check two ips at the same network segment at when we use the ping from ip1 to ip2, we can get the package with tcpdump -- 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