Illegal format string in trace message in NAKACK2 protocol ---------------------------------------------------------- Key: JGRP-1810 URL: https://issues.jboss.org/browse/JGRP-1810 Project: JGroups Issue Type: Bug Affects Versions: 3.4.3 Reporter: Chris LeCompte Assignee: Bela Ban Priority: Minor Fix For: 3.4.4 The NAKACK2 protocol has an invalid format string in one of its trace logging outputs: log.trace("%s: my_highest_rcvd (%) < stability_highest_rcvd (%): requesting retransmission of %s", local_addr, my_hr, hr, member + "#" + hr); This results in an error in the log: ERROR - Illegal format string "%s: my_highest_rcvd (%) < stability_highest_rcvd (%): requesting retransmission of %s" The % should be changed to %% to avoid the error. The arguments are in fact printed alongside the message however anything with ERROR in the text makes QA nervous.