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2755129 - IQ abort due stack trace and corruption on temp cache

Symptom

IQ abort due stack trace and corruption on temp cache. This occurs in different servers.

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Excerpt of IQMSG

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temp Bufman: Incorrect page header read; from slib/s_bufman.cxx:3199 into buffer 0x1e5c645418
expected: btype=17,pbn=0,txn=0,sp=0,nlb=16,npb=0,iscmp=0,uid=9223372046450361611,blk=187,mn=2,upmn=2,flgs=0x80000012
head: btype=0,pbn=0,txn=0,sp=0,nlb=0,npb=0,iscmp=0,ctr=0,cta=0,ver=0,pb=0,pus=0
buffer: 0x0000000000000000000000000000000000000000000000000000000000000000
....
....
Exception Thrown from slib/s_blockmap.cxx:7188, Err# 0, tid 1448 origtid 1448
O/S Err#: 0, ErrID: 2100 (s_corruptdiskblkhdrexception); SQLCode: -1009039, SQLState: 'QSA39', Severity: 14
temp Bufman: An error was detected on a database page. You may have a damaged index. For additional information, please check your IQ message file or run sp_iqcheckdb.
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**************************************************
*** SAP IQ Abort:
*** From: slib/s_trycatch.cxx:386
*** PID: YYYYY
*** Message: freelist fatal error: freelist damaged
*** Thread: YYYYYYY (TID: NNNNN)
**************************************************


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Excerpt of stktrc file:

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s_dbmvbio::Allocate
s_VersioningBlockmap::Allocate
s_blockmap::AllocOrReallocPhysicalBlocks
s_buf::Write
.s_bufpartition::GetCleanPage
s_bufpartition::Find
s_blockmap::FindAndDirty
s_pageListCursor::LockStreamPtr
s_pageListCursor::PositionPage
s_gArrayCursorBase::PositionGroup
s_gDeleteCursor::Delete
s_ohcDeleteContext::DeleteNonUnique
hs_btcursor::DeleteNotifier
s_subohcParallelDeleteScanCursor::ThreadDeleteScan

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There are not hardware issues and dbfiles are ok.


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Environment

  • SAP IQ 16.0 SP11 PL20 and higher 

Product

SAP Sybase IQ 15.4

Keywords

abort  crash temporary cache temp Bufman corruption s_dbmvbio::Allocate s_VersioningBlockmap::Allocate s_blockmap::AllocOrReallocPhysicalBlocks s_trycatch.cxx 818356 , KBA , BC-SYB-IQ , Sybase IQ , Problem

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