Symptom
- 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.
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Environment
- SAP IQ16 SP11.01 on any platform
- SAP IQ16 SP11.06 upwards , including SP11.09, on any platform
Product
SAP IQ 16.0 ; SAP Sybase IQ 15.4
Keywords
"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
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