This is the documentation for CDH 4.7.0.
Documentation for other versions is available at Cloudera Documentation.

What's New in CDH4.2.2

This is a maintenance release that fixes a security issue, as well as a number of issues including the following.

  • Hadoop Common
    • HADOOP-9439 - JniBasedUnixGroupsMapping: fix some crash bugs
    • HADOOP-8151 - Error handling in snappy decompressor throws invalid exceptions
  • HDFS
    • HDFS-4799 - Corrupt replica can be prematurely removed from corruptReplicas map
    • HDFS-4621 - Additional logging to help diagnose slow QJM logSync
  • HBase
    • HBASE-8446 - Allow parallel snapshot of different tables
    • HBASE-8690 - Reduce unnecessary getFileStatus hdfs calls in TTL hfile and hlog cleaners
    • HBASE-8706 - Some improvement in snapshots
    • HBASE-8712 - HFileLinkCleaner (FSUtils.listStatus) logs too much if links do not exist
    • HBASE-8742 - HTableDescriptor Properties not preserved when cloning
    • HBASE-8783 - RSSnapshotManager.ZKProcedureMemberRpcs may be initialized with the wrong server name
    • HBASE-9158 - Serious bug in cyclic replication
    • HBASE-8207 - Replication could have data loss when machine name contains hyphen
  • MapReduce
    • MAPREDUCE-5364 - Deadlock between RenewalTimerTask methods cancel() and run()
  • Hive:
    • HIVE-3300 - LOAD DATA INPATH fails if a hdfs file with same name is added to table
    • HIVE-4342 - NPE for query involving UNION ALL with nested JOIN and UNION ALL
    • HIVE-4766 - Support HS2 client login timeout when the thrift thread max# is reached
    • HIVE-4398 - HS2 Resource leak: operation handles not cleaned when originating session is closed
  • Oozie
    • OOZIE-1377 - OpenJPA runtime enhancement should be disabled and update OpenJPA to 2.2.2
    • OOZIE-1440 - Build fails in certain environments due to xerces OpenJPA issue