Hello @RammiSE    Your Post is being replied a bit late, yet I am posting a response anyways. Assuming your Team has resolved the Issue, Appreciate your Team sharing the details in the Post for wider audience.    For HMaster to be Initialised, "hbase:meta" & "hbase:namespace" Table Region needs to be Online. In your previous thread, the HMaster is reporting "hbase:meta" isn't Online [1]. As such, Use the HBCK2 JAR to assign the "hbase:meta" Region "1588230740" first & review (Via HBase UI) whether Regions are being assigned successfully. It's feasible the "hbase:namespace" Table Region would also reporting similar tracing, in which case your Team needs to use HBCK2 JAR to assign the "hbase:namespace" Region. Restarting HMaster after manually performing HBCK2 Assign isn't required always, yet the same won't harm as well.    Regards, Smarak   [1]  2023-01-23 16:05:34,990 WARN [master/ctrlsu-hbaseMS:16000:becomeActiveMaster] master.HMaster: hbase:meta,,1.1588230740 is NOT online; state={1588230740 state=OPEN, ts=1674468867063, server=hadoop-datanode2,16020,1674362337687}; ServerCrashProcedures=true. Master startup cannot progress, in holding-pattern until region onlined   ... View more