Hello @shubs    If you have fixed the issue, Kindly update the Post with the Solution.   The Exception is coming from DFSInputStream with EOFException. Worth checking if the RegionServer having issues has any Zero Length WAL File under the WAL Directory. Or, Enable TRACE Logging on the concerned RegionServer to capture additional details on the concerned Exception. Or, Checking which WAL is being replicated & any FS issues with the blocks associated with the WAL File.   - Smarak ... View more

Hello @SimL    YARN Timeline Server v2 Reader uses HBase for Storage. The Log & HBCK Report shows the Table "prod.timelineservice.entity" has Regions in OPENING State, which would naturally cause any Client accessing the Table report RetriesExhaustedWithDetailsException.   A Region is typically stuck in OPENING State, if there is any issues with WALEditReplay or any other reason, which would be clear from the RegionServer Logs where the Region is being opened. Unless the RegionServer Logs are available, any Comment is unlikely to be an accurate assessment of the issue your team is facing. Would recommend checking the RegionServer Logs wherein the Regions are in OPENING State & based on the cause, plan accordingly.    - Smarak ... View more

Hello @qu1etstorm    The Logs FileNotFoundException & YouAreDeadException are typically observed after the Cause, so worth checking the Logs before the concerned 2 Exception. TheYouAreDeadException is thrown by the Master when a RegionServer reports and is already being processed as Dead. This can happen when aRegionServer loses its session but didn't figure it yet. So, Best to check with respect to the RegionServer ZNode Session tracking in the Logs, while comparing the time at when the Master detected the RegionServer Ephemeral ZNode as being removed. Typically, JVMPause are the most likely cause.    - Smarak ... View more

Hello @amit_    The Post is couple of months old, yet wish to know if you have fixed the issue. The Lease seems to have expired after ~30 Minutes as per your Configuration. However, the Log shows a processingTime of ~30/~60 Seconds for ~5MB of Scan Size, so the Scanner Lease expiring after ~30 Minutes looks strange & appears to be caused by either the Client going away somehow or the processingTime being excessively slow.    If you have fixed the issue, Will appreciate your feedback on the Post.   - Smarak  ... View more

Thank You @Seaport for sharing the Solution for wider audience. In short, you followed the Link [1] to resolve the Protocol Header Issue as utilised by the User in Link [2].    - Smarak   [1] https://github.com/python-happybase/happybase/issues/161 [2] https://community.cloudera.com/t5/Support-Questions/Sharing-how-to-solve-HUE-and-HBase-connect-problem-on-CDH-6/td-p/82030   ... View more

Hello @ASIF123    Atlas Janus is an HBase Table, created with Column Family specification only. The DDL of the concerned Atlas Table is available in the HMaster UI & Master Logs, when Atlas Service is initialised for 1st time. However, Column Families are added eventually & each Row of the concerned Table has Different Column Qualifier. In short, there is no Static Definition of Atlas Janus Table.    Any Phoenix Table or View mapping requires explicit specification of the Column Family & Column Qualifier. Henceforth, the Phoenix Table or View DDL will be specific to Customer's Env. Your team can review the Atlas Janus Table Output via Scan & confirm the Column Qualifier against each Column Family. Accordingly, the Phoenix Table or View can be created.    - Smarak ... View more

Thanks for the reply @smdas. ... View more

Hello @rameshlk    Maybe this Post by Josh Elser would help, wherein he discussed using PQS behind Load Balancer to achieve High Availability: https://community.cloudera.com/t5/Community-Articles/Deploying-the-Phoenix-Query-Server-in-production/tac-p/245110   - Smarak ... View more