Hadoop Recovery

Hadoop Recovery

Following Hadoop Recovery topics are covered in this blog. These steps are useful for hadoop admins.

HADOOP ISSUES – Hive Zookeeper URL fails to connect to hive while trying to access from oozie to Hive2

Hive bug HIVE-12500

HDP 2.3.2 has a bug that does’t support Oozie -> Hive2 -> hive ZK url. This has been fixed in HDP-2.3.4

HADOOP ISSUES – dncp_block_verification.log.prev too large

dncp_block_verification.log.prev too large

Seen this bug in hdp2.3.2

Using hadoop version : Hadoop 2.0.0-cdh4.7.0

can see on one datanode, dncp_block_verification.log.prev is too large.

Is it safe to delete this file?

-rw-r--r-- 1 hdfs hdfs 1166438426181 Oct 31 09:34 dncp_block_verification.log.prev
-rw-r--r-- 1 hdfs hdfs     138576163 Dec 15 22:16 dncp_block_verification.log.curr

This is similar to HDFS-6114 but that is for dncp_block_verification.log.curr file.