About vinayraghava198

vinayraghava198 · ‎09-11-2018

Dear Community members, When NiFi and NiFi-registry running securely (ssl/https) , getting the below error when starting verson controlling in NiFi even after adding local NiFi user in the nifi-registry . Can someone please help . Error Unable to obtain listing of buckets: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: No subject alternative names present .

vinayraghava198 · ‎05-05-2017

@Bala Vignesh N V Thank you very much , the table I am querying was compressed and the above suggestion did help.

vinayraghava198 · ‎05-05-2017

Hi All, I am seeing a strange issue with Hortonworks hive, the below HQL statement is producing a file with junk characters. Do you think I have missed something? Same query is producing readable data in Cloudera cluster. Can someone please suggest. INSERT OVERWRITE LOCAL DIRECTORY '<Local Linux Directory>' ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' STORED AS TEXTFILE SELECT col1,col2 FROM table1;

vinayraghava198 · ‎04-07-2017

@Sonu Sahi, Thank you very much this information is very helpful.

vinayraghava198 · ‎04-06-2017

Hi @Sonu Sahi, Did you get chance to see my comments above? Regards...

vinayraghava198 · ‎03-21-2017

Hi @Sonu Sahi, Thanks for reply, assume that 1. my HDFS cluster is 95% full 2. I have a requirement to ingest new data of volume 10% the size of the cluster storage. 3. Assume I have taken HDFS snapshot of entire cluster and then deleted some 50 % of Cluster data so that I can ingest the data mentioned in Step 2. I am not sure what exactly will happen when I ingest new data(10% the size of Cluster)to HDFS after step 3. Please let me know if something is not clear.

vinayraghava198 · ‎03-21-2017

This is duplicate of the below question so closing this question. https://community.hortonworks.com/questions/89165/how-hdfs-snapshot-works-internally-1.html#answer-89207

vinayraghava198 · ‎03-16-2017

Hi All, I recently came to know about HDFS Snapshots, I know that HDFS Snapshot are readonly copy of Name node metadata and any accidentally deleted file can be recovered from HDFS Snapshots. Can someone please explain how HDFS Snapshots internally work and any criteria on maximum duration within which a deleted file has to be recovered from HDFS Snapshots? Assuming HDFS Snapshot is take before deletion of the file, can I recover a file which is deleted few weeks back from HDFS Snapshot? If yes what if memory blocks of deleted file is used to store data of new file, before the recovery of deleted file. Please let me know if something is not clear.

vinayraghava198 · ‎03-16-2017

Hi All, I recently came to know about HDFS Snapshots, I know that HDFS Snapshot are readonly copy of Name node metadata and any accidentally deleted file can be recovered from HDFS Snapshots. Can someone please explain how HDFS Snapshots internally work and any criteria on maximum duration within which a deleted file has to be recovered from HDFS Snapshots? Assuming HDFS Snapshot is take before deletion of the file, can I recover a file which is deleted few weeks back from HDFS Snapshot? If yes what if memory blocks of deleted file is used to store data of new file, before the recovery of deleted file. Please let me know if something is not clear.

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Cloudera Community

SSLHandshakeException between NiFi and NiFi regist...

Re: Hive Insert overwrite directory producing junk...

Hive Insert overwrite directory producing junk cha...

Re: How HDFS Snapshot works internally.

Re: How HDFS Snapshot works internally.

Re: How HDFS Snapshot works internally.

Re: How HDFS Snapshot works internally.

How HDFS Snapshot works internally.

How HDFS Snapshot works internally.