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Long term component architecture

As the main curator of open standards in Hadoop, Cloudera has a track record of bringing new open source solutions into its platform (such as Apache Spark, Apache HBase, and Apache Parquet) that are eventually adopted by the community at large. As standards, you can build longterm architecture on these components with confidence.



With the exception of DSSD support, Cloudera Enterprise 5.6.0 is identical to CDH 5.5.2/Cloudera Manager 5.5.3  If you do not need DSSD support, you do not need to upgrade if you are already using the latest 5.5.x release.


CDH 5 provides packages for Red-Hat-compatible, SLES, Ubuntu, and Debian systems as described below.

Operating System Version Packages
Red Hat Enterprise Linux (RHEL)-compatible
Red Hat Enterprise Linux 5.7 64-bit
  6.2 64-bit
  6.4 64-bit
  6.4 in SE Linux mode 64-bit
  6.5 64-bit
CentOS 5.7 64-bit
  6.2 64-bit
  6.4 64-bit
  6.4 in SE Linux mode 64-bit
  6.5 64-bit
Oracle Linux with default kernel and Unbreakable Enterprise Kernel 5.6 (UEK R2) 64-bit
  6.4 (UEK R2) 64-bit
  6.5 (UEK R2, UEK R3) 64-bit
SLES Linux Enterprise Server (SLES) 11 with Service Pack 2 or later 64-bit
Ubuntu Precise (12.04) - Long-Term Support (LTS) 64-bit
  Trusty (14.04) - Long-Term Support (LTS) 64-bit
Debian Wheezy (7.0, 7.1) 64-bit


  • CDH 5 provides only 64-bit packages.
  • Cloudera has received reports that our RPMs work well on Fedora, but we have not tested this.
  • If you are using an operating system that is not supported by Cloudera packages, you can also download source tarballs from Downloads.


Selected tab: supportedoperatingsystems
Component MySQL SQLite PostgreSQL Oracle Derby - see Note 4
Oozie 5.5, 5.6 - 8.4, 9.1, 9.2, 9.3

See Note 2

11gR2 Default
Flume - - - - Default (for the JDBC Channel only)
Hue 5.5, 5.6

See Note 1

Default 8.4, 9.1, 9.2, 9.3

See Note 2

11gR2 -
Hive/Impala 5.5, 5.6

See Note 1

- 8.4, 9.1, 9.2, 9.3

See Note 2

11gR2 Default
Sentry 5.5, 5.6

See Note 1

- 8.4, 9.1, 9.2,, 9.3

See Note 2

11gR2 -
Sqoop 1 See Note 3 - See Note 3 See Note 3 -
Sqoop 2 See Note 4 - See Note 4 See Note 4 Default


  1. MySQL 5.5 is supported on CDH 5.1. MySQL 5.6 is supported on CDH 5.1 and later.
  2. PostgreSQL 9.2 is supported on CDH 5.1 and later. PostgreSQL 9.3 is supported on CDH 5.2 and later.
  3. For the purposes of transferring data only, Sqoop 1 supports MySQL 5.0 and above, PostgreSQL 8.4 and above, Oracle 10.2 and above, Teradata 13.10 and above, and Netezza TwinFin 5.0 and above. The Sqoop metastore works only with HSQLDB (1.8.0 and higher 1.x versions; the metastore does not work with any HSQLDB 2.x versions).
  4. Sqoop 2 can transfer data to and from MySQL 5.0 and above, PostgreSQL 8.4 and above, Oracle 10.2 and above, and Microsoft SQL Server 2012 and above. The Sqoop 2 repository database is supported only on Derby.
  5. Derby is supported as shown in the table, but not always recommended. See the pages for individual components in the Cloudera Installation and Upgrade guide for recommendations.
Selected tab: supporteddatabases

CDH 5 is supported with the versions shown in the table that follows.

Table 1. Supported JDK Versions

Latest Certified Version Minimum Supported Version Exceptions
1.7.0_67 1.7.0_67 None
1.8.0_11 1.8.0_11 None

Selected tab: supportedjdkversions

CDH requires IPv4. IPv6 is not supported.

See also Configuring Network Names.

Selected tab: supportedinternetprotocol
Selected tab: systemrequirements

Known Issues Fixed in CDH 5.2.5


Upstream Issues Fixed

The following upstream issues are fixed in CDH 5.2.5:

  • HADOOP-11350 - The size of header buffer of HttpServer is too small when HTTPS is enabled
  • HADOOP-11710 - Make CryptoOutputStream behave like DFSOutputStream wrt synchronization
  • HADOOP-11674 - oneByteBuf in CryptoInputStream and CryptoOutputStream should be non static
  • HDFS-6830 - BlockInfo.addStorage fails when DN changes the storage for a block replica
  • HDFS-7960 - The full block report should prune zombie storages even if they're not empty
  • HDFS-6425 - Large postponedMisreplicatedBlocks has impact on blockReport latency
  • HDFS-7575 - Upgrade should generate a unique storage ID for each volume
  • HDFS-7596 - NameNode should prune dead storages from storageMap
  • HDFS-7579 - Improve log reporting during block report rpc failure
  • HDFS-7208 - NN doesn't schedule replication when a DN storage fails
  • HDFS-6899 - Allow changing MiniDFSCluster volumes per DN and capacity per volume
  • HDFS-6878 - Change MiniDFSCluster to support StorageType configuration for individual directories
  • HDFS-6678 - MiniDFSCluster may still be partially running after initialization fails.
  • HDFS-7575 - Upgrade should generate a unique storage ID for each volume
  • HDFS-7960 - The full block report should prune zombie storages even if they're not empty
  • YARN-570 - Time strings are formated in different timezone
  • YARN-2251 - Avoid negative elapsed time in JHS/MRAM web UI and services
  • YARN-3242 - Asynchrony in ZK-close can lead to ZKRMStateStore watcher receiving events for old client
  • MAPREDUCE-5957 - AM throws ClassNotFoundException with job classloader enabled if custom output format/committer is used
  • MAPREDUCE-6076 - Zero map split input length combine with none zero map split input length may cause MR1 job hung sometimes.
  • MAPREDUCE-6275 - Race condition in FileOutputCommitter v2 for user-specified task output subdirs
  • MAPREDUCE-4815 - Speed up FileOutputCommitter#commitJob for many output files
  • HIVE-2828 - make timestamp accessible in the hbase KeyValue
  • HIVE-2828 - make timestamp accessible in the hbase KeyValue
  • HIVE-7433 - ColumnMappins.ColumnMapping should expose public accessors for its fields
  • HIVE-6148 - Support arbitrary structs stored in HBase
  • HIVE-6147 - Support avro data stored in HBase columns
  • HIVE-6584 - Add HiveHBaseTableSnapshotInputFormat
  • HIVE-6411 - Support more generic way of using composite key for HBaseHandler
  • HIVE-6677 - HBaseSerDe needs to be refactored
  • HIVE-9934 - Vulnerability in LdapAuthenticationProviderImpl enables HiveServer2 client to degrade the authentication mechanism to "none", allowing authentication without password
  • HIVE-7737 - Hive logs full exception for table not found
  • HIVE-9716 - Map job fails when table's LOCATION does not have scheme
  • HIVE-8688 - serialized plan OutputStream is not being closed
  • HIVE-5857 - Reduce tasks do not work in uber mode in YARN
  • HUE-2446 - Migrating from CDH 4.7 to CDH 5.0.1+/Hue 3.5+ will fail
  • HUE-2371 - [sentry] Sentry URI should be created only with a ALL permission
  • HUE-1663 - [core] Option to either follow or not LDAP referrals for auth
  • SENTRY-654 - Calls to append_partition fail when Sentry is enabled
  • SOLR-7092 - Stop the HDFS lease recovery retries on HdfsTransactionLog on close and try to avoid lease recovery on closed files.
  • SOLR-7134 - Replication can still cause index corruption.
  • SOLR-7113 - Multiple calls to UpdateLog#init is not thread safe with respect to the HDFS FileSystem client object usage.
  • SOLR-7141 - RecoveryStrategy: Raise time that we wait for any updates from the leader before they saw the recovery state to have finished.
  • SQOOP-1764 - Numeric Overflow when getting extent map
  • IMPALA-1658: Add compatibility flag for Hive-Parquet-Timestamps
  • IMPALA-1794: Fix infinite loop opening/closing file w/ invalid metadata
  • IMPALA-1801: external-data-source-executor leaking global jni refs



Selected tab: whatsnew

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