Size of XMIT_REQ is not limited ------------------------------- Key: JGRP-1868 URL: https://issues.jboss.org/browse/JGRP-1868 Project: JGroups Issue Type: Bug Security Level: Public(Everyone can see) Reporter: Radim Vansa Assignee: Bela Ban Fix For: 3.6 When UNICAST3 sends XMIT_REQ, it serializes SeqnoList as payload without any limits upon its size. If there are too many missing messages, the XMIT_REQ grows over TP.max_bundle_size and cannot be sent at all. {code} JGRP000029: edg-perf03-10774: failed sending message to edg-perf01-63702 (64072 bytes): java.lang.Exception: message size (64072) is greater than max bundling size (64000). Set the fragmentation/bundle size in FRAG and TP correctly, headers: UNICAST3: XMIT_REQ, seqno=0, UDP: [channel_name=default] {code} It's also undesirable to resend thousands of messages, as the receiver likely cannot process them all at once and only few of them will be actually processed. Therefore only X oldest ones (in order to cleanup the tables) should be resent.