Hi list,
I found each invoke of HiveServer's execute method run in different
threads. Those threads which execute a HSQL query(not a client connection
may execute several pieces of queries), have not their own session state.
when I call SessionState.get(), it will return null beacuse session state on
this thread hadnot been constructed before. see also fragment of
ExecDriver.java:
public static String getRealFiles(Configuration conf) {
// fill in local files to be added to the task environment
SessionState ss = SessionState.get(); // return ss will get null !!!
...
}
Is it a bug?
Thanks,
Min
--
My research interests are distributed systems, parallel computing and
bytecode based virtual machine.
http://coderplay.javaeye.com
