2535969 - Trying to restore a SAP IQ server results in zombie process

Trying to restore a SAP IQ server results in zombie process. Restore does not complete, no database or related files get created indicating nothing is happening.

• Executing ps shows
  [iq@XXX DEVIQ1]$ ps -ef | grep iqsrv
  iq 10637 43742 0 05:58 pts/2 00:00:00 grep iqsrv
  iq 51941 1 0 03:41 ? 00:00:03 [iqsrv16] <defunct>
  iq 61675 1 87 Jul19 ? 4-16:54:57 [iqsrv16] <defunct>
  iq 64090 1 0 Jul24 ? 00:00:00 [iqsrv16] <defunct>
  iq 64713 1 0 Jul24 ? 00:00:10 [iqsrv16] <defunct>
• netstat shows IQ PID in CLOSE_WAIT state
  [iq@XXX DEVIQ1]$ netstat -n | grep 2638
  tcp 0 0 127.0.0.1:2638 127.0.0.1:4651 CLOSE_WAIT
  tcp 9 0 10.16.16.108:2638 10.16.16.101:35523 CLOSE_WAIT
  tcp 0 0 127.0.0.1:2638 127.0.0.1:40410 CLOSE_WAIT
  tcp 0 0 127.0.0.1:2638 127.0.0.1:1265 CLOSE_WAIT
• pstack on a running IQUtility process shows all threads are waiting on operating system tasks to complete
  Threads (1): 2
  UnixTask::wait(unsigned short)
  CondVar::wait(Mutex&)
  CountingSemaphore::wait()
  c_engine_env_notifier::listener(void*)
  run_task_body
  UnixTask::pre_body(void*)
  

  Threads (1): 10 
  semop
  sysv_waiton_semaphore
  c_strm_shm_port::listen(ShmThreadLauncher*)
  run_task_body
  UnixTask::pre_body(void*)

• SAP IQ16.0
• SAP IQ16.1 
• Linux

hung , timeout , dblocate, utility_db , util , database , OS , KBA , BC-SYB-IQ , Sybase IQ , Problem