Member since
07-14-2020
18
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1
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1
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My Accepted Solutions
Title | Views | Posted |
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1673 | 10-06-2020 07:48 AM |
10-06-2020
07:57 AM
Permission Denied for the user. Try checking the read and execute permission or ranger policies.
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10-06-2020
07:54 AM
Thanks for prompt response and testing. This worked for me too previously.
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10-06-2020
07:48 AM
1 Kudo
Hello Lakshu, Kindly check the Keytab and if not present generate new keytab and let me know. 1. Do check keytab. 2. Regenerate keytab and give appropriate acl and proceed restarting the service. seems that there may be DNS issues or lookup issues while fetching the information.
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07-16-2020
08:04 AM
@ARVINDR : Thanks for the info on that cluster creation part. Did you try to check the ACL.
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07-16-2020
07:02 AM
@ARVINDR : Is it happening on your production cluster or test cluster. From the error i see that there is some prob with the repo. Could you just check that.
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07-16-2020
06:19 AM
@ARVINDR : seems to be acl issues : 1.pls do a directory listing from hdfs which the lock file is refering too. 2. Is that a running cluster or creating the cluster from the scratch ?
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07-16-2020
01:23 AM
@ARVINDR : Do u still face issue ? Could you send the below things: 1. When u start the NN i need console logs(screen logs or ambari logs while you see the operation) 2. I need the NN logs.
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07-15-2020
11:59 PM
@Mondi : Yes it refers to meta data and the point in which the snapshot is done. You can revert or restore the data from the snapshot at any point in time. https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/HdfsSnapshots.html
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07-15-2020
10:02 PM
@ARVINDR The netstat output was empty because no process is listening to your port. The above screenshot says it's warning. Did that application started ?? Which version you are using so that we could provide you the excat documentation link. Let me know your insight.
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07-15-2020
09:51 PM
HDFS Snapshots are read-only point-in-time copies of the file system. Snapshots can be taken on a subtree of the file system or the entire file system. Some common use cases of snapshots are data backup, protection against user errors and disaster recovery. The implementation of HDFS Snapshots is efficient: Snapshot creation is instantaneous: the cost is O(1) excluding the inode lookup time. Additional memory is used only when modifications are made relative to a snapshot: memory usage is O(M), where M is the number of modified files/directories. Blocks in datanodes are not copied: the snapshot files record the block list and the file size. There is no data copying. Snapshots do not adversely affect regular HDFS operations: modifications are recorded in reverse chronological order so that the current data can be accessed directly. The snapshot data is computed by subtracting the modifications from the current data.
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