Last updated on APRIL 28, 2015
Applies to:Big Data Appliance Integrated Software - Version 4.1.0 and later
How to disable HDFS Snapshots on Oracle BDA V4.*.
Due to Jira: HDFS-6908 disabling HDFS Snapshots may be required as HDFS-6908 can cause the fsimage to be corrupted. Once the fsimage is corrupted, restarting a NameNode will raise: NullPointerException. See: Restarting a NameNode on the BDA Fails with "FATAL namenode.NameNode: Exception in namenode join java.lang.NullPointerException". (Doc ID 2002790.1). HDFS-6908 is fixed in CDH 5.1.3 and 5.2.0 (BDA V4.1) and higher.
Note: For BDA V4.0 and lower:
- Disable HDFS Snapshots when upgrading from CDH 5.1.2 (BDA V4.0) and earlier versions.
- Due to HDFD-6908 the recommendation is to disable HDFS Snapshots in CDH versions prior to CDH 5.1.3 which is BDA V4.0 and lower.
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