HiveServer2 OOM

Even having enough heap size my hiveserver2 going outofmemory, I enable heap dump on error which producing 650MB of heap although I have hiveserver2 configured with 8GB Heap. here is the stacktrace of the thread which went in to OOM,could anybody let me know why it throwing OOM "pool-2-thread-4"

[jira] [Created] (HIVE-12086) ORC: Buffered float readers to remove vtable thunks

Gopal V created HIVE-12086: -- Summary: ORC: Buffered float readers to remove vtable thunks Key: HIVE-12086 URL: https://issues.apache.org/jira/browse/HIVE-12086 Project: Hive Issue Type: Bug

Build failed in Jenkins: HIVE-TRUNK-JAVA8 #121

See Changes: [Ashutosh Chauhan] HIVE-11977 : Hive should handle an external avro table with zero length files present (Aaron Dossett via Ashutosh Chauhan) [Ashutosh Chauhan] HIVE-12018 : beeline --help