Hbase Regional servers go down periodicaly

[#1]

log error :

[DataStreamer for file /apps/hbase/data/data/default/rece_landingfiles/3868057112d965e8eb5a81250d6d28a7/.tmp/407aa154c13343b6b2a519918206fc04 block B P-684511763-10.220.21.80-1485291405940:blk_1074588428_848536] hdfs.DFSClient: DataStreamer Exception java.lang.OutOfMemoryError: Direct buffer memory        at java.nio.Bits.reserveMemory(Bits.java:658

[#2]

Increase the amount of direct memory you configure for the JVM by setting

-XX:MaxDirectMemorySize=...

If you are not using direct memory via the HBase BlockCache or something else completely, 1-2GB should be sufficient.

Fun fact: The service you're referring to is not a "Regional Server", it is "RegionServer". It is a server that hosts "region".