Given the fact that Spark is in memory processing and Hadoop is more to do with Disk based processing (higher disk I/O), I was wondering for sizing the containers and RAM needs, do we need more RAM for running same use case with Spark when compared to Hadoop Map-Reduce? ... View more

Hi folks, One of the requirements is to redirect the all kind of logs/ ranger logs/access logs and also other component's logs to external file system. Probably on NFS and not on HDFS or in the DB. Does HDP provide out of the box solution for this? One workaround I can think of using Flume but wanted to know other approaches? Regards, DP ... View more

Hi folks, I am trying to run the spark PI example on the Hortonworks cluster. I could run this successfully in the local mode and in the yarn client mode . When I try to run it using YARN cluster mode I do not see any out put or error. I am not sure if it is running or is there a bug. Can you please help me understand this behavior? Here are the commands I am trying to use. spark-submit --class org.apache.spark.examples.SparkPi --master yarn --deploy-mode cluster ../lib/spark-examples*.jar 10 Also tried with spark-submit --class org.apache.spark.examples.SparkPi --master yarn-cluster ../lib/spark-examples*.jar 10 (One more question are above both correct ?) Both the times I see the following console log but not the PI value. ( When I run in local mode or yarn-client mode I see the value of PI printed on the console) 16/02/11 11:06:05 WARN Client: spark.yarn.am.extraJavaOptions will not take effect in cluster mode 16/02/11 11:06:05 INFO SecurityManager: Changing view acls to: username 16/02/11 11:06:05 INFO SecurityManager: Changing modify acls to: username 16/02/11 11:06:05 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(username); users with modify permissions: Set(username) 16/02/11 11:06:06 INFO Client: Submitting application 432 to ResourceManager 16/02/11 11:06:06 INFO YarnClientImpl: Submitted application application_1454617624671_0432 16/02/11 11:06:07 INFO Client: Application report for application_1454617624671_0432 (state: ACCEPTED) 16/02/11 11:06:07 INFO Client: client token: N/A diagnostics: N/A ApplicationMaster host: N/A ApplicationMaster RPC port: -1 queue: default start time: 1455188766121 final status: UNDEFINED tracking URL: http://SomeIP:8088/proxy/application_1454617624671_0432/ user: username .............. 16/02/11 11:06:23 INFO Client: Application report for application_1454617624671_0432 (state: FINISHED) 16/02/11 11:06:23 INFO Client: client token: N/A diagnostics: N/A ApplicationMaster host: APP_Master_host_IP ApplicationMaster RPC port: 0 queue: default start time: 1455188766121 final status: SUCCEEDED tracking URL: http://SomeIP:8088/proxy/application_1454617624671_0432/ user: username 16/02/11 11:06:23 INFO ShutdownHookManager: Shutdown hook called 16/02/11 11:06:23 INFO ShutdownHookManager: Deleting directory /tmp/spark-54dc94ab-cf66-4d17-9940-1c31ba7e9850 [username@remoteIP bin]$ ... View more

Hi, After restarting the cluster randomly we see couple of red alerts in Ambari. Earlier also I remember seeing them sometime back and now again I see them again. Can you suggest what could be going wrong? I checked the ports 10001 and 9083 are open/in use. HiveHive Metastore Process ==================================== Connection failed on host HIVE_HOST:10001 (Execution of 'ambari-sudo.sh su ambari-qa -l -s /bin/bash -c 'export PATH='"'"'/usr/sbin:/sbin:/usr/lib/ambari-server/*:/usr/sbin:/sbin:/usr/lib/ambari-server/*:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/var/lib/ambari-agent:/var/lib/ambari-agent:/bin/:/usr/bin/:/usr/lib/hive/bin/:/usr/sbin/'"'"' ; ! beeline -u '"'"'jdbc:hive2://HIVE_HOST:10001/;transportMode=http;httpPath=cliservice;principal=hive/_HOST@REALM.COM'"'"' -e '"'"''"'"' 2>&1| awk '"'"'{print}'"'"'|grep -i -e '"'"'Connection refused'"'"' -e '"'"'Invalid URL'"'"''' was killed due timeout after 30 seconds) HiveHiveServer2 Process ============================= Metastore on HIVE_HOST failed (Execution of 'ambari-sudo.sh su ambari-qa -l -s /bin/bash -c 'export PATH='"'"'/usr/sbin:/sbin:/usr/lib/ambari-server/*:/usr/sbin:/sbin:/usr/lib/ambari-server/*:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/var/lib/ambari-agent:/var/lib/ambari-agent:/bin/:/usr/bin/:/usr/sbin/:/usr/hdp/current/hive-metastore/bin'"'"' ; export HIVE_CONF_DIR='"'"'/usr/hdp/current/hive-metastore/conf/conf.server'"'"' ; hive --hiveconf hive.metastore.uris=thrift://HIVE_HOST:9083 --hiveconf hive.metastore.client.connect.retry.delay=1 --hiveconf hive.metastore.failure.retries=1 --hiveconf hive.metastore.connect.retries=1 --hiveconf hive.metastore.client.socket.timeout=14 --hiveconf hive.execution.engine=mr -e '"'"'show databases;'"'"''' was killed due timeout after 30 seconds) ... View more

Hi, We have configured the NN in HA mode, it is a kerberized cluster. During the weekend we have shutdown all the nodes and today started all the nodes. I've valid TGT issues before issuing hadoop fs -ls commands. Now when I trying to issue hadoop fs -ls I see the following stack trace : ( Saying it is under safemode). When I checked the HDFS was really in Safemode. Using shell command I made it to move out of safemode. But still when we issue hadoop fs -ls / on the console I still see that NN are in safe mode. 15/12/21 16:37:13 INFO retry.RetryInvocationHandler: Exception while invoking getFileInfo of class ClientNamenodeProtocolTranslatorPB over Namenode_HOST_2/192.168.1.4:8020 after 1 fail over attempts. Trying to fail over after sleeping for 676ms. org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(StandbyState.java:87) at org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(NameNode.java:1872) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOperation(FSNamesystem.java:1306) $ hadoop dfsadmin -safemode get DEPRECATED: Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it. ... View more

Hi Folks, In the kerberized cluster, we integrated AD for Ambari authentication. Using the AD users, I am able to login to Ambari. But when I log in by default it lands on the views. But When I click any of the views, I see an error. 500 Authentication requiredCollapse Stack Trace org.apache.hadoop.security.AccessControlException: Authentication required at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.validateResponse(WebHdfsFileSystem.java:334) at org.apache.hadoop.hdfs.web.WebHdfsFileSystem.access$200(WebHdfsFileSystem.java:91) at org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.runWithRetry(WebHdfsFileSystem.java:608) at org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.access$100(WebHdfsFileSystem.java:458) at org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner$1.run(WebHdfsFileSystem.java:487) While configuring the file view here are the properties I've used : Settings: WebHDFS Username ${username} WebHDFS Authorization = auth=KERBEROS;proxyuser=admin Cluster Configuration Related to the cluster HDFS and name node details. After Kerberization I created a user "ambari­-user/ambari-Host_name_here@KDCRealm.com And also created a key tab, copied on the ambari -server machine. Stopped Ambari server and then $ambari­-server setup­security Specified the keytab of the Ambari-user (newly created the User in KDC) and started the Ambari-Server. Trying to access the Ambari -view but getting the above error. Did any one face similar issue? I am following the HDP documention section Configuring Ambari User Views with a Secure Cluster : http://hortonworks.com/wp-content/uploads/2015/04/AmbariUserViewsTechPreview_v1.pdf Regards, DP ... View more