Hi, I have a 7 node Hbase 2.0.0.3.1 cluster with 12 TB of data, 128MB memstore flush size and 20GB regions. At a time writing happens only on 7 regions and I’m not performing any reads.
I’m seeing OOM errors with 32 GB heap even if I stop the ingestions. I followed this blog post related to Hbase RegionServer sizing http://hadoop-hbase.blogspot.com/2013/01/hbase-region-server-memory-sizing.html. But here according to the explanation only the active regions ( on which new data is being written) will impact the heap/memstore but the heap usage even without any ingestion is touching 32GB. Even the memstore size as shown on the Hbase UI is 0 and the block cache is totally free. I took heap dumps and it shows the majority of heap being used by byte[] objects of regionserverHStore and regionserverHRegionServer. Can anyone point me in the right direction about what may be causing high heap usage even without reads and writes? Regards, Anshuman
