[infinispan-issues] [JBoss JIRA] Commented: (ISPN-1217) Implement Virtual Nodes for Hotrod Client Server

[ https://issues.jboss.org/browse/ISPN-1217?page=com.atlassian.jira.plugin.... ] Galder Zamarreño commented on ISPN-1217: ---------------------------------------- Indeed, the current HotRod server set up is that a HotRod topology address has a map of cache->hashId where it assumes that there's a single hashId per cache. Virtual nodes breaks this assumption which means that for a topology address, a given cache has multiple hashIds. Luckily, this should not require a change in the protocol (http://community.jboss.org/docs/DOC-14421) because nothing stops the server sending several hash id entries for a single host:port, i.e. localhost:1234,hashId=75848, localhost:1234,hashId=78304...etc. Internally, the server will have to do some adjustments including using a different method instead of ConsistentHash.getHashId(). For future reference, here's the stacktrace: {code}java.lang.IllegalStateException: With virtual nodes enabled each address has more than one hash id at org.infinispan.distribution.ch.AbstractWheelConsistentHash.getHashId(AbstractWheelConsistentHash.java:205) at org.infinispan.server.hotrod.HotRodServer.org$infinispan$server$hotrod$HotRodServer$$updateHashIds(HotRodServer.scala:176) at org.infinispan.server.hotrod.HotRodServer$$anonfun$createTopologyAddress$1.apply(HotRodServer.scala:156) at org.infinispan.server.hotrod.HotRodServer$$anonfun$createTopologyAddress$1.apply(HotRodServer.scala:155) at scala.collection.Iterator$class.foreach(Iterator.scala:631) at scala.collection.JavaConversions$JIteratorWrapper.foreach(JavaConversions.scala:549) at org.infinispan.server.hotrod.HotRodServer.createTopologyAddress(HotRodServer.scala:155) at org.infinispan.server.hotrod.HotRodServer.addSelfToTopologyView(HotRodServer.scala:106) at org.infinispan.server.hotrod.HotRodServer.startTransport(HotRodServer.scala:98) at org.infinispan.server.core.AbstractProtocolServer.start(AbstractProtocolServer.scala:99) at org.infinispan.server.hotrod.HotRodServer.start(HotRodServer.scala:79) ... {code} -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira