Fixed Issues in HDFS

Review the list of HDFS issues that are resolved in Cloudera Runtime 7.1.4.

CDPD-17842: MAPREDUCE-7298: For SSL Enabled Service, the distcp job is not closed leading to leaked TrustStore Reloader Thread.

This issue is now resolved.

CDPD-12296: HDFS-15313: If any Inodes are referenced in the active file system tree, the Inodes are deleted when a snapshot is deleted.

This issue is now resolved. Now, Inodes are not deleted when a snapshot is deleted.

CDPD-6100

This improvement makes HDFS NameNode leave safemode immediately if all blocks have reported in, reducing the cluster startup time.

CDPD-2946: Slow reading and writing of erasure-coded files

The ISA-L library is not packaged with HDFS as a result of which HDFS erasure coding falls back to the Java implementation which is much slower than the native Hadoop implementation. This slows down the reading and writing of erasure-coded files.