I have more than 350 regions per region server and as result it has to created one alert in ambari . There is way to increase regionsize and reduce number of regions but I am not sure about performance after the increment of size of region. What are optimal ways to reduce number of regions per regionserver. ... View more

kakfa leader not available I have added 1 more broker earlier kafka has 3 brokers , producer is throwing an error ; WARN clients.NetworkClient: Error while fetching metadata with correlation id 5493 : {amoll=LEADER_NOT_AVAILABLE}   I have checked advertised.host.name and I see kafka broker default group and kafka broker1 group there . Kind Regards Amol ... View more

how does sentry differ from ranger ? what are the things We can not achieve with using sentry and that is achievable from ranger and vice-versa. ... View more

I am trying to fetch results data stored in hive orc table , but when I run the query it gives results fast but When I run the with limit clause it is taking too much of time . select * from tablename where year="2019" and month="jan-mar" ; - Runs perfectly within 30-40secs select * from tablename limit 10; - Gets stuck ... View more

I want to run distcp job copying huge data from source cluster to destination cluster , how can i increase the performance or speed of the distcp job ? ... View more

I am running the spark job which is leading to failure of job with the error no space left on the device however there is enough space available in the device . i have checked with df -h and df -i command and no issue with the space I see . Caused by: org.apache.spark.SparkException: Job aborted due to stage failure: Task 656 in stage 11.0 failed 4 times, most recent failure: Lost task 656.3 in stage 11.0 (TID 680, I<workernode>): java.io.IOException: No space left on device ... View more