Hi, all. I am Peng Wang, a student trying to use and learn Hama. I cloned the develop git repository of Hama.
I firstly tried the newest version in the tag, the tag: *0.7.0-SNAPSHOT.* commit bef419747695d15de8a1087f44028ee40571b5f9 Author: Edward J. Yoon <[email protected]> Date: *Fri Mar 29 00:44:59 2013* +0000 [maven-release-plugin] copy for tag 0.7.0-SNAPSHOT git-svn-id: https://svn.apache.org/repos/asf/hama/tags/0.7.0-SNAPSHOT@146236613f79535-47bb-0310-9956-ffa450edef68 But the tag: *0.6.3-RC3* commit c9526b1272c83d641332667ce5d81d7ccc94be06 Author: Edward J. Yoon <[email protected]> Date: * Sun Oct 6 08:27:00 2013* +0000 [maven-release-plugin] copy for tag 0.6.3-RC3 git-svn-id: https://svn.apache.org/repos/asf/hama/tags/0.6.3-RC3@152959413f79535-47bb-0310-9956-ffa450edef68 *From the commit log, 0.7.0-SNAPSHOT is earlier than 0.6.3-RC3, * So I used 0.6.3-RC3 instead of 0.7.0-SNAPSHOT (but on the website of hama, 0.7.0-SNAPSHOT is the newest version) Then I deployed Hama with the Pseudo Distributed Mode on my desktop with 3 task runners. I tried PageRank with a small input of my own. But it failes. And its log is: java.lang.IllegalArgumentException: Messages must never be behind the vertex in ID! Current Message ID: 100128 vs. 1004 at org.apache.hama.graph.GraphJobRunner.iterate(GraphJobRunner.java:306) at org.apache.hama.graph.GraphJobRunner.doSuperstep(GraphJobRunner.java:254) at org.apache.hama.graph.GraphJobRunner.bsp(GraphJobRunner.java:145) at org.apache.hama.bsp.BSPTask.runBSP(BSPTask.java:177) at org.apache.hama.bsp.BSPTask.run(BSPTask.java:146) at org.apache.hama.bsp.GroomServer$BSPPeerChild.main(GroomServer.java:1246) Could you tell me what is the problem in my situation? I check whether hama had finished the loading phase, and I found "14/02/25 16:45:00 INFO graph.GraphJobRunner: 2918 vertices are loaded into localhost:60340 "in the log. So it had finished the loading phase. After this, I read the source code, and I found during the loading, peers would not exchange vertices with each other as hama 0.5.0 did. So how does hama 0.6.3 solve the problem below: a peer load a vertex which is belong to another peer? Could you tell which branch or tag is a stable version? And does it support fault tolerance for graph algorithms? and how can I get it?
