we have ambari cluster version 2.6 , this ambari cluster configured with service auto start enabled for all the services in our cluster we stop all services as HDFS , YARN , Zookeeper . Hive , etc and reboot the masters machines ( master01,master02,master03 ) we suppose to get the services up after reboot , all machines linux are up include ambari-server and ambari-agent on all masters machines but all services are down include ZK , HDFS , YARN and all restt we not understand why the ambari feature - service auto start not start auto the services after boot ? how to know if service auto start is working here ? and how top trace it ? after one hour from the reboot still all services are down ! ... View more

just in case we delete the wrong topic as /usr/hdp/current/kafka-broker/bin/kafka-topics.sh --zookeeper hdpmaster01:2181 --delete --topic gtom.poli.pri.proc Topic gtom.poli.pri.procis already marked for deletion and now we want to revert it what are the steps to revert topic deletion? all folders topics as the following are still exists under /var/kafka/kafka-logs gtom.poli.pri.procis-23 gtom.poli.pri.procis-45 gtom.poli.pri.procis-34 . . ... View more

we do the following steps in order to delete the topic - hgpo.llo.prmt.processed but even after 12 hours topics folders still not deleted from /var/kafka/kafka-logs note - we set - delete.topic.enable=true hkafka01 kafka-logs]# /usr/hdp/current/kafka-broker/bin/kafka-topics.sh --zookeeper master01:2181 --alter --topic hgpo.llo.prmt.processed--config retention.ms=1000 WARNING: Altering topic configuration from this script has been deprecated and may be removed in future releases. Going forward, please use kafka-configs.sh for this functionality Updated config for topic "hgpo.llo.prmt.processedd" kafka01 kafka-logs]# /usr/hdp/current/kafka-broker/bin/kafka-topics.sh --zookeeper master01:2181 --delete --topic hgpo.llo.prmt.processed Topic hgpo.llo.prmt.processed is already marked for deletion. how to force the topic deletion ? on kafka machine ( production machine ) , we see that: ( no free space ) /dev/sdb 15500450528 15500434144 0 100% /var/kafka and under /var/kafka/kafka-logs , we still see all topic folders (huge size) as example: ( down ) so is it possible just to remove these folders as example - by rm -rf hgpo.llo.prmt.processed-28 ? under /var/kafka/kafka-logs we have many topic folders as : 117G hgpo.llo.prmt.processed-28 117G hgpo.llo.prmt.processed-29 117G hgpo.llo.prmt.processed-3 117G hgpo.llo.prmt.processed-30 117G hgpo.llo.prmt.processed-31 117G hgpo.llo.prmt.processed-32 . . . . . ... View more