Member since
12-09-2015
97
Posts
51
Kudos Received
3
Solutions
My Accepted Solutions
Title | Views | Posted |
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1523 | 05-04-2016 06:00 AM | |
3263 | 04-11-2016 09:57 AM | |
1023 | 04-08-2016 11:30 AM |
02-09-2016
02:59 PM
On the host details page, I can see various clients listed as "Client / HBase Client, HCat Client...". I would like to understand what are these clients and what is their use?. I also see that some of the clients have a red rectangle against them.
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Apache Ambari
02-09-2016
01:53 PM
@Neeraj Sabharwal Those log files were like best friends to me!. I found that the log for resourcemanager was showing zookeeper related issues. When I went to the dashboard, I saw that the Zookeeper service was not up. I run the Zookeeper service and then my Jobs started running fine!!!!! . I had not started the Zookeeper service deliberately as I thought it is not required for running a simple MapReduce Job. Maybe I was wrong. Do you have any technical explanation for this Neeraj. Thanks again!
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02-09-2016
12:37 PM
@Neeraj Sabharwal I am running out of option. Can you suggest something?. I now see that the Resourcemanager service is running fine. It is green in colour, but when I run the jobs, it comes back with the same info about Resourcemanager being tried.. I have been waiting since last 10 minutes, but I am still seeing the same message being displayed "INFO ipc.Client: Retrying connect to server: mycomputer.mydomain.com/172.26.180.6:8050."
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02-08-2016
03:53 PM
I will try for RM HA, but as another alternative, Is it a good idea trying to move ResourceManager to another node?. Because I have most of the services installed and running on the master node. Maybe the master node is too much loaded in terms of memory utilization?. From the graph on the dashboard, the memory utilization of master node is around 50% only.
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02-08-2016
03:45 PM
The execution console has been giving this warning since the last 4 minutes, with no sign of any failure or successful execution of job. But, on thing I observed is that the "ResourceManager Service" is in red :(. Just to add to it, I do not see any log files under /hadoop/yarn/og folder. It is empty. Where should I look for logs if I have to find out what is going wrong?
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02-08-2016
03:26 PM
1 Kudo
Okay. So now I have another issue while executing MapReduce jobs. This same MapReduce was running fine yesterday, but now I am getting this error which mentions about ResourceManager. It keeps on trying for ever. I have done a lot of googling before posting this error. I have also restarted Resourcemanager service several times, but with no affect. ResourceManager is shown as green on the Dashboard. Following is the error. 16/02/08 20:33:19 INFO client.RMProxy: Connecting to ResourceManager at master.mydomain.com/172.26.180.6:8050
16/02/08 20:33:20 INFO ipc.Client: Retrying connect to server: master.mydomain.com/172.26.180.6:8050. Already tried 0 time(s);
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Apache Hadoop
02-08-2016
01:32 PM
Thanks Benjamin. I will accept your answer here, as you are the first to provide me with some guideline on going to ambari configuration section and try out the command. I had to do some additional steps, which you can see in my posted answer.
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02-08-2016
01:27 PM
3 Kudos
I fixed all this issue. This is what I have done. Hope this helps users who are stuck in similar situation. The error "org.apache.hadoop.hive.metastore.HiveMetaException: Failed to get schema version" was fixed by updating the password of the hive user from the Ambari configuration file. It seems I had typed incorrect password in the configuration section. After that I started getting schema reading errors. So I went to mysql console and dropped the hive database and recreated the database and reassigned the hive users to the database. I also executed the command "$HIVE_HOME/bin/schematool -initSchema -dbType mysql" as suggested by Neeraj. After that it all worked perfectly fine!. Special thanks to Neeraj Sabharwal, who have been helping me with all the errors. Thanks Neeraj once again.
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02-08-2016
12:40 PM
1 Kudo
Yes I am using HDP. The log also showed some permission issue, so I went into the configuration section and I updated the password of hive user. After I did this, I do not see the schema version exception anymore!!. Now, when I start the Hive Metastore service, I see the two errors (see then end of this comment). I also tried to create new database, but the option 'New MySQL Database" is not clickable. It is disabled. Errors are: SLF4J: Class path contains multiple SLF4J bindings. org.apache.hadoop.hive.metastore.HiveMetaException:Schema initialization FAILED!
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02-08-2016
09:44 AM
Hi, I am unable to find where is hive installed. When I do echo $HIVE_HOME, it comes out blank. I need the path of the hive so that I can edit "hive-site.xml". I do not know where I can find "hive-site.xml". When I executed the find command for "hive-site.xml" I get a huge list. (I cannot paste the list here in the comment, because it exceeds the character limit). I am confused now. I do not which hive-site.xml should I edit?
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