Today , I'm trying to adopt G1GC for region server GC.
But someone told me below problem may occur.
And apache hbase patched this at 1.4
Is this problems are still in CDH 5.9 ?
Thanks in advance.
We are running 5.4.3 in prod on large hbase clusters with g1gc, have not noticed the problems you have listed. Not to say that they aren't there, just haven't noticed them in my experience. you can find which jiras cloudera has bundled into the 5.9 release here: http://www.cloudera.com/documentation/enterprise/release-notes/topics/cdh_rn_fixed_in_59.html#fixed_...
from a quick glance, it doesn't appear that the solution to those issues you linked are in the 5.9 release.