2356855 - sp_iqrebuildindex s_bufman abort ERROR: Destroying Locked Logical Buffer - SAP IQ

• Post upgrade to SAP IQ 16.0 SP11 from Sybase IQ 15.4  rebuilding tables  to convert FP indexes to NBit.
  
  
• While executing sp_iqrebuildindex of an IQ table, it caused a server crash at s_bufman.cxx while "Destroying Locked Logical Buffer" 

  **************************************************
   *** SAP IQ Abort:
   *** From: slib/s_bufman.cxx:5313
   *** PID: 2583
   *** Message: Destroying Locked Logical Buffer
   *** Thread: 588 (TID: 579)
   **************************************************

• stack trace cotains this method call sequence

  s_bufpartition::DestroyLogicalBuffer
   s_blockmap::DestroyIfExists
   s_mergeFINALWriter::CompletePage()
   s_mergeFINALWriter::DoInsert()
   hs_dpInsert::Insert(s_ColumnVector const*)
   dfiio_FP::FetchOpus()
   dfo_IndexInsert::FetchOpus()
   df_CombinerFetchContext::Fetch()
   hc_dfrun::FillRun
   hc_dmfrun::InitNextWorkUnit

• running a sp_iqcheckdb  DBCC consistency check may report  'No Errors Detected' on affected table.

• SAP IQ16 SP11.01 on any platform
• SAP IQ16 SP11.06 upwards , including SP11.09,  on  any platform

"s_mergeFINALWriter::RolloverNBits",  "s_bufman.cxx:5318",  "s_bufman.cxx:5357", "DestroyLogicalBuffer" , CR#809036, 809036, CR809036, sybase, fails, crash, bufman, "Buffer in main bufman", dump, pcstkwalk, ucstkgentrace, DumpAllThreads, hos_ABORT, , KBA , BC-SYB-IQ , Sybase IQ , Problem