那些在CDH5中是bug，到了CDH6版本就修复了的问题

盘点那些在CDH5中是bug，到了CDH6版本就修复了的问题。涉及到Hadoop、HDFS、YARN、HBASE、hive、hue、impala、kudu、oozie、solr、spark、kafka、parquet、zookeeper等组件。如果你的集群问题是被列出的这些，那么升级是可以解决问题的。
列出的只是部分的一百多个问题，Cloudera今年年底会停止CDH5的支持，对于CDH5的用户来说，升级是大势所趋。

问题 问题描述
HADOOP-12267 s3a failure due to integer overflow bug in AWS SDK
HADOOP-15169 “hadoop.ssl.enabled.protocols” should be considered in httpserver2
HADOOP-15812 ABFS: Improve AbfsRestOperationException format to ensure full msg can be displayed on console
HADOOP-15846 ABFS: fix mask related bugs in setAcl, modifyAclEntries and removeAclEntries.
HADOOP-15872 ABFS: Update to target 2018-11-09 REST version for ADLS Gen 2
HADOOP-15940 ABFS: For HNS account, avoid unnecessary get call when doing Rename
HADOOP-15948 Inconsistency in get and put syntax if filename/dirname contains space
HADOOP-15968 ABFS: getNamespaceEnabled can fail blocking user access thru ACLs
HADOOP-15969 ABFS: getNamespaceEnabled can fail blocking user access thru ACLs
HADOOP-15972 ABFS: reduce list page size to to 500
HADOOP-15975 ABFS: remove timeout check for DELETE and RENAME
HADOOP-16048 ABFS: Fix Date format parser
HADOOP-16461 Regression: FileSystem cache lock parses XML within the lock
HADOOP-16578 ABFS: fileSystemExists() should not call container level apis
HADOOP- 16587 OM and DN should persist SCM certificate as the trust root
HDFS-13193 Various Improvements for BlockTokenSecretManager
HDFS-13941 make storageId in BlockPoolTokenSecretManager.checkAccess optional
HDFS-14026 Overload BlockPoolTokenSecretManager.checkAccess to make storageId and storageType optional
HDFS-14366 Improve HDFS append performance
YARN- 9217 Nodemanager will fail to start if GPU is misconfigured on the node or GPU drivers missing
YARN-9235 If linux container executor is not set for a GPU cluster GpuResourceHandlerImpl is not initialized and NPE is thrown
YARN-9337 GPU auto-discovery script runs even when the resource is given by hand
HBASE- 21991 Fix MetaMetrics issues - [Race condition, Faulty remove logic], few improvements
HBASE-22380 Break circle replication when doing bulkload
HBASE-23046 Remove compatibility case from truncate command
HIVE- 21999 Add sensitive ABFS configuration properties to HiveConf hidden list <