我正在尝试运行Giraph Quick Start中描述的SimpleShortestPathsVertex(又名SimpleShortestPathComputation)示例。我正在使用VirtualBox在Hortonworks沙盒实例(HDP 2.1)上运行此程序，并使用配置文件hadoop_2.0.0打包了giraph.jar。
当我尝试使用运行示例
hadoop jar giraph.jar org.apache.giraph.GiraphRunner
org.apache.giraph.examples.SimpleShortestPathsVertex -vif
org.apache.giraph.io.formats.JsonLongDoubleFloatDoubleVertexInputFormat -vip
/user/hue/tinygraph.txt -of org.apache.giraph.io.formats.IdWithValueTextOutputFormat
-op /user/hue/output/shortestpaths -w 1
我得到以下异常
2014-04-30 07:22:15,390 INFO [main] org.apache.giraph.zk.ZooKeeperManager: onlineZooKeeperServers: Connect attempt 0 of 10 max trying to connect to sandbox.hortonworks.com:22181 with poll msecs = 3000
2014-04-30 07:22:15,396 WARN [main] org.apache.giraph.zk.ZooKeeperManager: onlineZooKeeperServers: Got ConnectException
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at org.apache.giraph.zk.ZooKeeperManager.onlineZooKeeperServers(ZooKeeperManager.java:701)
at org.apache.giraph.graph.GraphTaskManager.startZooKeeperManager(GraphTaskManager.java:357)
at org.apache.giraph.graph.GraphTaskManager.setup(GraphTaskManager.java:188)
at org.apache.giraph.graph.GraphMapper.setup(GraphMapper.java:60)
at org.apache.giraph.graph.GraphMapper.run(GraphMapper.java:90)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
我发现了一个解决方法-看来Giraph希望ZooKeeper在端口22181上运行，而实际上它在2181上运行。我只是使用Ambari界面将ZooKeeper设置为在22181上运行(转到
http://127.0.0.1:8080/，登录admin /管理员，服务选项卡，ZooKeeper，并将端口更改为22181，保存并执行服务操作->全部重新启动。有没有人对此问题有更好的解决方案？是否有通过其指定端口的配置，或者在Giraph源代码中此端口是错字？
最佳答案
是的，您可以使用-Dgiraph.zkList=localhost:2181选项指定每次运行Giraph作业的时间
另外，您可以在Hadoop配置中对其进行设置，然后不必在每次提交Giraph作业时都传递此选项。为此，在conf/core-site.xml文件中添加以下行:<property><name>giraph.zkList</name><value>localhost:2181</value></property>
[请检查语法，我不记得它的语法，目前我无法访问群集进行检查]