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Developer's Closet

A place where I can put my code and discuss big data.

Azure Price Comparison Chart

  • Azure
August 3, 2018 kevin No comments

I found this fantastic page for comparing Azure VM prices: Azure VM Comparison

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HBase: ReplicationLogCleaner: Failed to get stat of replication rs node

  • Uncategorized
May 26, 2018June 12, 2018 kevin No comments

The oldWALs folder in HBase has been growing for the past few days – the folder is 1 TB and growing – the oldWALs are […]

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HBase: Unable to start Master: TableExistsException: hbase:namespace

  • HBase
May 14, 2018May 17, 2018 kevin No comments

I recreated an HBase service on one of my clusters and on start received a TableExistsException error: Error: org.apache.hadoop.hbase.master.TableNamespaceManager Namespace table not found. Creating… Jul […]

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List DPM Backups

  • DPM
May 4, 2018May 7, 2018 kevin No comments

I was asked to create a list of what we are backing up with DPM, including the schedule and frequency. I looked around and came […]

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PowerShell Script to Query VMM

  • Uncategorized
March 12, 2018June 12, 2018 kevin No comments

Query List of VMs The following PowerShell script will query VMM for a list of VMs. Use this as a start. Query List of VMs […]

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HBase: RowCount Script

  • Bash
  • HBase
  • Linux
March 6, 2018March 6, 2018 kevin No comments

I wrote a quick script to count all rows in all tables in HBase. This works great for my Dev clusters that have ever-growing tables […]

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Use PowerShell to Retrieve a List of Servers from VMM

  • PowerShell
  • Virtual Machine Manager
September 29, 2017June 7, 2018 kevin No comments

Useful script to go after servers in VMM and output the list to a csv file.

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Search for string and append string to file

  • Bash
  • Linux
  • Ubuntu
September 26, 2017 kevin No comments

A very useful string search and append that I find myself rewriting over and over. So I’ve decided to write a post and capture the […]

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HDFS JournalNode: JournalNotFormattedException: Journal Storage Directory * not formatted

  • HDFS
August 15, 2017May 14, 2018 kevin No comments

I woke up to an alert from our Cloudera Manager managed Hadoop cluster: Error:  Aug 15, 2:46:01.285 PM  WARN    org.apache.hadoop.security.UserGroupInformation PriviledgedActionException as:hdfs (auth:SIMPLE) cause:org.apache.hadoop.hdfs.qjournal.protocol.JournalNotFormattedException: Journal […]

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Screen Command

  • Linux
June 19, 2017June 19, 2018 kevin No comments

Because I always forget: Create screen session: screen –S [session-name]   Detach from session: (keystrokes) Ctl a,d   Reattach to session: Screen –R [session-name]   […]

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  • Azure Price Comparison Chart
  • HBase: ReplicationLogCleaner: Failed to get stat of replication rs node
  • HBase: Unable to start Master: TableExistsException: hbase:namespace
  • List DPM Backups
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