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Yiqun Lin commented on HDFS-13214: ---------------------------------- Hi [~Tao Jie], {quote} So I think we should set dfs.nameservice.id to ns1 or ns2 rather than ns-fed. {quote} Yes, this should be right. {quote} Today property dfs.nameservice.id is not a necessary one in a federation cluster (HA or non-HA), right? {quote} >From the function {{DFSUtil.getNameServiceId(Configuration conf, String >addressKey)}} which used in the Router, {{dfs.nameservice.id}} doesn't must be >specified. If this key isn't set, then it find the nameservice Id by matching >the addressKey with the the address of the local node. If multiple addresses >that matched, then the error will be thrown. To avoid some potential problems happening in setting up Router, we can recommend users to configure the {{dfs.nameservice.id}}. If the local node is in a HA mode, {{dfs.ha.namenode.id}} is also recommended to configure. Otherwise, it will also found this by matching way. This can be documented in the doc of RBF. Any other thoughts? > RBF: Configuration on Router conflicts with client side configuration > --------------------------------------------------------------------- > > Key: HDFS-13214 > URL: https://issues.apache.org/jira/browse/HDFS-13214 > Project: Hadoop HDFS > Issue Type: Sub-task > Affects Versions: 2.9.0 > Reporter: Tao Jie > Priority: Major > > In a typical router-based federation cluster, hdfs-site.xml is supposed to be: > {code} > <property> > <name>dfs.nameservices</name> > <value>ns1,ns2,ns-fed</value> > </property> > <property> > <name>dfs.ha.namenodes.ns-fed</name> > <value>r1,r2</value> > </property> > <property> > <name>dfs.namenode.rpc-address.ns1</name> > <value>host1:8020</value> > </property> > <property> > <name>dfs.namenode.rpc-address.ns2</name> > <value>host2:8020</value> > </property> > <property> > <name>dfs.namenode.rpc-address.ns-fed.r1</name> > <value>host1:8888</value> > </property> > <property> > <name>dfs.namenode.rpc-address.ns-fed.r2</name> > <value>host2:8888</value> > </property> > {code} > {{dfs.ha.namenodes.ns-fed}} here is used for client to access the Router. > However with this configuration on server node, Router fails to start with > error: > {code} > org.apache.hadoop.HadoopIllegalArgumentException: Configuration has multiple > addresses that match local node's address. Please configure the system with > dfs.nameservice.id and dfs.ha.namenode.id > at org.apache.hadoop.hdfs.DFSUtil.getSuffixIDs(DFSUtil.java:1198) > at org.apache.hadoop.hdfs.DFSUtil.getNameServiceId(DFSUtil.java:1131) > at > org.apache.hadoop.hdfs.DFSUtil.getNamenodeNameServiceId(DFSUtil.java:1086) > at > org.apache.hadoop.hdfs.server.federation.router.Router.createLocalNamenodeHearbeatService(Router.java:466) > at > org.apache.hadoop.hdfs.server.federation.router.Router.createNamenodeHearbeatServices(Router.java:423) > at > org.apache.hadoop.hdfs.server.federation.router.Router.serviceInit(Router.java:199) > at > org.apache.hadoop.service.AbstractService.init(AbstractService.java:164) > at > org.apache.hadoop.hdfs.server.federation.router.DFSRouter.main(DFSRouter.java:69) > 2018-03-01 18:05:56,208 ERROR > org.apache.hadoop.hdfs.server.federation.router.DFSRouter: Failed to start > router > {code} > Then the router tries to find the local namenode, multiple properties: > {{dfs.namenode.rpc-address.ns1}}, {{dfs.namenode.rpc-address.ns-fed.r1}} > match the local address. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org