3501513 - IQ server becomes unresponsive after execution of system procedure sa_flush_cache - SAP IQ

• After executed system procedure sa_flush_cache Server became non-responsive
  
  
• Srvlog file contains messages:
  W. ** Task 0x71cb30(Request task 319) is trying get forbid mutex held by task 0x71b6c0(Request task 314) for more than 60000 ms
  W. ** Task 0x71b6c0(Request task 314) state: OS thread id=0x7f76bffff700
  W. ** Task 0x71b6c0(Request task 314) state: worker=0x7f76b4000930 wakend=1 waiting=40
  W. ** Worker 0x7f76b4000930 state: wakend=0 waiting=0 in_atomic=0 is_dedicated=0 in_critical_section=0 allow_forbid=0
  .....
  W. ** Worker 0x7f76b4000930 state: wakend=0 waiting=0 in_atomic=0 is_dedicated=0 in_critical_section=0 allow_forbid=0
   
• Manual Stacktrace generated during server hanging
  
  pthread_cond_wait@@GLIBC_2.3.2  
  UnixTask::wait  
  BaseRWLatch::wait
  BaseRWLatch::get_exclusive
  CacheInfo::Latch
  CacheImpl::FlushPages
  CacheImpl::Flush
  CacheImpl::sa_flush_cache(Database*) 
  sa_flush_cache(InternalProcCall&)
  RunInternalProcedure

SAP IQ 16.1

sybase, CR829445, CR#829445, 829445 , KBA , BC-SYB-IQ , Sybase IQ , Product Enhancement