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Re: Process to Start StandBy NameNode

by Explorer in Support Questions
‎09-10-2018 09:36 PM
‎09-10-2018 09:36 PM
@Harsh J yeap with    <property> <name>dfs.ha.fencing.methods</name> <value>shell(/bin/true)</value> </property> It working perfect now    Thanks you very much  ... View more

Re: Process to Start StandBy NameNode

by Explorer in Support Questions
‎09-10-2018 02:29 AM
‎09-10-2018 02:29 AM
Dear @Harsh J ,     Does 'Automatic Failover Configuration' need config 'Fencing Configuration' , It is   2 dependent section or I need both to config  Automatic Failover .   Because I met this error   ou must configure a fencing method before using automatic failover. org.apache.hadoop.ha.BadFencingConfigurationException: No fencer configured for NameNode at node1/x.x.x.x:8020 at org.apache.hadoop.hdfs.tools.NNHAServiceTarget.checkFencingConfigured(NNHAServiceTarget.java:132) at org.apache.hadoop.ha.ZKFailoverController.doRun(ZKFailoverController.java:225) at org.apache.hadoop.ha.ZKFailoverController.access$000(ZKFailoverController.java:60) at org.apache.hadoop.ha.ZKFailoverController$1.run(ZKFailoverController.java:171) at org.apache.hadoop.ha.ZKFailoverController$1.run(ZKFailoverController.java:167) at org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:444) at org.apache.hadoop.ha.ZKFailoverController.run(ZKFailoverController.java:167) at org.apache.hadoop.hdfs.tools.DFSZKFailoverController.main(DFSZKFailoverController.java:192) 2018-09-10 15:56:53,262 INFO org.apache.zookeeper.ZooKeeper: Session: 0x365c2b22a1e0000 closed 2018-09-10 15:56:53,262 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down   If I need both of them , so    <property> <name>dfs.ha.fencing.methods</name> <value>shell(/path/to/my/script.sh --nameservice=$target_nameserviceid $target_host:$target_port)</value> </property> What is the  /path/to/my/script.sh   The contain of this script I am not clear about this , pls explain and may be give me an example .   Thanks you     ... View more

Re: Process to Start StandBy NameNode

by Explorer in Support Questions
‎09-08-2018 02:44 AM
‎09-08-2018 02:44 AM
Thanks @saranvisa but I am  not using  CM , just install by command line. ... View more

Re: Process to Start StandBy NameNode

by Explorer in Support Questions
‎09-07-2018 04:10 AM
‎09-07-2018 04:10 AM
Yeap as @Harsh J said I am using a CDH package based (non-CM) installation.  I will show more about my config  I have 3 nodes: node 1 , node 2 , node 3    zookeeper in 3 nodes: 3 nodes with the same config   maxClientCnxns=50 tickTime=2000 initLimit=10 syncLimit=5 dataDir=/var/lib/zookeeper clientPort=2181 dataLogDir=/var/lib/zookeeper     hdfs-site.xml in 3 nodes:   <property> <name>dfs.nameservices</name> <value>mycluster</value> </property> <property> <name>dfs.ha.namenodes.mycluster</name> <value>node1,node2</value> </property> <property> <name>dfs.namenode.rpc-address.mycluster.node1</name> <value>node1:8020</value> </property> <property> <name>dfs.namenode.rpc-address.mycluster.node2</name> <value>node2:8020</value> </property> <property> <name>dfs.namenode.http-address.mycluster.node1</name> <value>node1:50070</value> </property> <property> <name>dfs.namenode.http-address.mycluster.node2</name> <value>node2:50070</value> </property> <property> <name>dfs.namenode.shared.edits.dir</name> <value>qjournal://node1:8485;node2:8485;node3:8485/mycluster</value> </property> <property> <name>dfs.client.failover.proxy.provider.mycluster</name> <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value> </property> <property> <name>dfs.ha.automatic-failover.enabled</name> <value>true</value> </property> <property> <name>dfs.journalnode.edits.dir</name> <value>/namenode/dfs/jn</value> </property> core-site.xml in 3 nodes:     <property> <name>fs.defaultFS</name> <value>hdfs://mycluster</value> </property> <property> <name>ha.zookeeper.quorum</name> <value>node1:2181,node2:2181,node3:2181</value> </property>   Above is config relate to cluster namnode. I doupt  about zookeeper config , does is it enough ?    Service install on each node Node 1:  hadoop-hdfs-journalnode  hadoop-hdfs-namenode    hadoop-hdfs-zkfc  zookeeper-server Node 2: hadoop-hdfs-journalnode  hadoop-hdfs-namenode    hadoop-hdfs-zkfc  zookeeper-server Node 3:  hadoop-hdfs-journalnode  zookeeper-server   The firt time initial is ok:  Node 1 active , Node 2 standby   Stop namenode service on Node 1 => node 2 active => OK    But when start service NameNode on Node 1 again    node 1 active And node 2 active too => fail        ... View more

Process to Start StandBy NameNode

by Explorer in Support Questions
‎09-05-2018 09:01 PM
‎09-05-2018 09:01 PM
Hi everyone,   My system have 2 datanode, 2  namenode, 3 journalnode, 3 zookeeper service    I had config cluster namenode ok , when browsing the admin page namenode:50070 , I had see 1 name node status (active) and one namenode status (standby). => OK    When I stop active namenode the other with standby become active .  => OK   But the problem is how start the namenode which I had stop again ?   I do the following :   sudo -u hdfs hdfs namenode -bootstrapStandby -force /etc/init.d/hadoop-hdfs-namenode start With above process sometime namenode start ok with standby mode , but sometime it start with active mode and then I have 2 active node (split brain !!)   So what I have wrong , what is the right process to start a namenode had stop again   Thanks you           ... View more
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Re: Config Yarn with cluster NameNode

by Explorer in Support Questions
‎03-15-2018 08:10 PM
‎03-15-2018 08:10 PM
After check again hdfs-site.xml on 2 DataNode where Yarn Node Manager stand on , I see that the hdfs-site file missing this line when compare with the hdfs-site on Name Node   <property> <name>dfs.client.failover.proxy.provider.radcluster</name> <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value> </property> restart the Yarn Node Manager Service , It work now , Thanks you ... View more

Config Yarn with cluster NameNode

by Explorer in Support Questions
‎03-15-2018 02:22 AM
‎03-15-2018 02:22 AM
My system have 2 NameNode as Cluster (nn1 active, nn2 standby) 2 DataNode   1 Yarn Resource Manager service is on nn1 2 Yarn Node Manager is on 2 DataNode   Before config cluster NameNode everything work well After config Namde Node as cluster , Yarn start ok but when submit script from Hue I have some error   2018-03-15 15:46:49,203 INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService: Failed to download resource { { hdfs://mycluster/user/oozie/share/lib/lib_20171215093741/pig/jsp-2.1-6.1.14.jar, 1513305464001, FILE, null },pending,[(container_1521103549281_0001_02_000001)],8742037577451777,DOWNLOADING} java.lang.IllegalArgumentException: java.net.UnknownHostException: mycluster at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:406) at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:310) at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:176) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:728) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:671) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:155) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2815) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:98) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2852) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2834) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:387) at org.apache.hadoop.fs.Path.getFileSystem(Path.java:296) at org.apache.hadoop.yarn.util.FSDownload.copy(FSDownload.java:249) at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:356) at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:60) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:748) Caused by: java.net.UnknownHostException: mycluster View log on both Yarn Node manager service I see above error . How Can I fix this Thanks   ... View more
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