Known Issues in HDFS

This topic describes known issues and unsupported features for using HDFS in this release of Cloudera Runtime.

OPSAPS-55788: WebHDFS is always enabled. The Enable WebHDFS checkbox does not take effect.

None.

Unsupported Features

The following HDFS features are currently not supported in Cloudera Data Platform:

ACLs for the NFS gateway (HADOOP-11004)
Aliyun Cloud Connector (HADOOP-12756)
Allow HDFS block replicas to be provided by an external storage system (HDFS-9806)
Consistent standby Serving reads (HDFS-12943)
Cost-Based RPC FairCallQueue (HDFS-14403)
HDFS Router Based Federation (HDFS-10467)
More than two NameNodes (HDFS-6440)
NameNode Federation (HDFS-1052)
NameNode Port-based Selective Encryption (HDFS-13541)
Non-Volatile Storage Class Memory (SCM) in HDFS Cache Directives (HDFS-13762)
OpenStack Swift (HADOOP-8545)
SFTP FileSystem (HADOOP-5732)
Storage policy satisfier (HDFS-10285)

Technical Service Bulletins

TSB 2021-406: CVE-2020-9492 Hadoop filesystem bindings (ie: webhdfs) allows credential stealing: WebHDFS clients might send SPNEGO authorization header to remote URL without proper verification. A maliciously crafted request can trigger services to send server credentials to a webhdfs path (ie: webhdfs://…) for capturing the service principal.
Knowledge article: For the latest update on this issue see the corresponding Knowledge article: TSB-2021 406: CVE-2020-9492 Hadoop filesystem bindings (ie: webhdfs) allows credential stealing