SWIFT_PING discovery protocol fatal error on OpenStack Kilo ----------------------------------------------------------- Key: JGRP-1954 URL: https://issues.jboss.org/browse/JGRP-1954 Project: JGroups Issue Type: Bug Affects Versions: 3.6.4 Environment: JGroups client running on Mac OS X - Yosemite JDK 1.7.71 OpenStack Kilo Reporter: Nick Sawadsky Assignee: Bela Ban Fix For: 3.6.5 I'm attempting to use the SWIFT_PING discovery protocol on the most recent version of OpenStack, "Kilo". An error occurs during initialization of the protocol stack, the stack trace is provided below. The problem appears to be that support for XML-formatted responses has been removed in the OpenStack Identity API (http://developer.openstack.org/api-ref-identity-v2.html). Even though SWIFT_PING sends an Accept header of application/xml, the response still comes back as JSON (around line 286 of SWIFT_PING.java). I've been able to repro the issue using Postman in Chrome. I tried providing the *request* in XML , with a Content-Type header of application/xml, but Swift returns an error: "Expecting to find application/json in Content-Type header". It seems like the resolution would be for SWIFT_PING to be modified so it can parse the JSON response that it is receiving. If that sounds like a reasonable approach, I can try to create a patch that fixes the issue. Stack Trace: 2015-08-21 14:30:16,123 FATAL [com.pingidentity.common.util.ErrorHandler] Problem creating factory for multiplexed cluster communications org.xml.sax.SAXParseException: Content is not allowed in prolog. at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:257) ~[?:1.8.0_25] at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:348) ~[?:1.8.0_25] at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:121) ~[?:1.8.0_25] at org.jgroups.protocols.SWIFT_PING$Keystone_V_2_0_Auth.authenticate(SWIFT_PING.java:307) ~[jgroups.jar:3.6.4.Final] at org.jgroups.protocols.SWIFT_PING$SwiftClient.authenticate(SWIFT_PING.java:443) ~[jgroups.jar:3.6.4.Final] at org.jgroups.protocols.SWIFT_PING.init(SWIFT_PING.java:68) ~[jgroups.jar:3.6.4.Final] at org.jgroups.stack.ProtocolStack.initProtocolStack(ProtocolStack.java:860) ~[jgroups.jar:3.6.4.Final] at org.jgroups.stack.ProtocolStack.setup(ProtocolStack.java:481) ~[jgroups.jar:3.6.4.Final] at org.jgroups.JChannel.init(JChannel.java:854) ~[jgroups.jar:3.6.4.Final] at org.jgroups.JChannel.<init>(JChannel.java:159) ~[jgroups.jar:3.6.4.Final] at org.jgroups.JChannel.<init>(JChannel.java:120) ~[jgroups.jar:3.6.4.Final]