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2668057 - IQ process hung due to deadlock

Symptom

Under rare circumstances, an SAP IQ server may become unresponsive under heavy DDL operations in an MPX environment.
Stacktraces taken minutes apart will be identical and contain the phrases “s_buf::WaitForSignal_DontCareIfBusy” and “ ::AdjustFreeList” in one thread-stack and phrases “hos_mutex::Lock” and “s_buf::Write” in another.


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Environment

  • SAP IQ 16.0
  • SAP IQ 16.1

Product

SAP IQ 16.0 ; SAP IQ 16.1

Keywords

s_buf::WaitForSignal_DontCareIfBusy, s_iqstore::AdjustFreeList, hos_mutex::Lock, s_buf::Write, CR 815579, deadlock , KBA , BC-SYB-IQ , Sybase IQ , Problem

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