Hello   system: centos 6.6 Hadoop 2.5.0-cdh5.3.0 impalad version 2.1.0 java version "1.8.0_11"   Running a imple query on impala-shell I get the following error:    Connected to n1:21000    Query: select key from auth limit 4    Query finished, fetching results ...    Error communicating with impalad: TSocket read 0 bytes    Could not execute command: select key from auth limit 4   The query is quite simple but the dataset is quite big. impala log file reports the following error:     ==> impalad.INFO <==     #     # A fatal error has been detected by the Java Runtime Environment:     #     #  SIGSEGV (0xb) at pc=0x00007f7ccbc94d20, pid=19181, tid=140170971166464     #     # JRE version: Java(TM) SE Runtime Environment (8.0_11-b12) (build 1.8.0_11-b12)     # Java VM: Java HotSpot(TM) 64-Bit Server VM (25.11-b03 mixed mode linux-amd64 compressed oops)     # Problematic frame:     # C  [libc.so.6+0x89d20]  memcpy+0x3c0     #     # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again     #     # An error report file with more information is saved as:     # /var/run/cloudera-scm-agent/process/8600-impala-IMPALAD/hs_err_pid19181.log     #     # If you would like to submit a bug report, please visit:     #   http://bugreport.sun.com/bugreport/crash.jsp     #     Doen anyone have any idea on how to solve thi error?   Thanks   ... View more