Hi @iamfromsky , Thank you for reaching out to our community!  The error message which you have provided is logged when either a "broken pipe" or "connection reset" happens, which is most likely network-related. Please check if the network is stable when you see these errors.   Also refer Jira HDFS-8814 for more details. ... View more

Hi @SimoneMasc , Thank you for reaching out to Cloudera Community! I would request you to please review the below documentation on basic requirements (OS/DB/Java/Network/Platform etc.) https://docs.cloudera.com/cdp/latest/release-guide/topics/cdpdc-requirements-supported-versions.html   Also, https://docs.cloudera.com/cdp-private-cloud/latest/data-migration/topics/cdp-data-migration-machine-learning-to-cdp.html which describes about data migration.   ... View more

Hi @CaptainJa ,   Thank you for reaching out to community! It looks like you are hitting Ambari UI Bug (https://issues.apache.org/jira/browse/AMBARI-21854).  Also, can you please confirm if the operating system you are using is RHEL7? because i see the base url used for repositories is for Centos6. Ensure to update the repository to use RedHat Satellite if the OS is Redhat7.    ... View more

Hi @regeamor,   Thank you for reaching out to community! The DistCp command submits a regular MapReduce job that performs a file-by-file copy. The block locations of the file is obtained from the name-node during MapReduce. On DistCp, each Mapper will be initiated, if possible, on the node where the first block of the file is present. In cases where the file is composed of multiple splits, they will be fetched from the neighbourhood if not available on the same node. The fs.s3a.fast.upload option significantly accelerates data upload by writing the data in blocks, possibly in parallel. Please refer on How to improve performance for DistCp  for more details.     ... View more

Hello @matagyula,   Thank you for reaching out to community! Please check if article https://community.cloudera.com/t5/Customer/DataNode-Block-Count-Threshold-alerts-are-displayed-in/ta-p/302261 helps you on this issue. ... View more

Hi @K_K,   Thank you for reaching out to community!   This is known issue for Ambari version 2.5.1. Please check https://issues.apache.org/jira/browse/AMBARI-21151 for more information.   ... View more

Hi @rohit19,   As this is an older post you would have a better chance of receiving a resolution by starting a new thread. This will also provide the opportunity to provide details specific to your environment that could aid others in providing a more accurate answer to your question. ... View more

Hi @shrikant_bm ,   Please find answers inline. 1. When active namenode server is rebooted will the standby namenode will not become active? Is this something expected? Or Did the HA did not work in our cluster Yes, standby NameNode will become active when primary NameNode reboots, provided high availability is enabled and configured.  2. Whether the HA is expected to work only between the active and standby namenode daemons? Yes, HA works only between active and standby NameNode. It is taken care by ZKFC (ZooKeeper Failover Controller). ... View more