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Re: MaxDB 7.6.06.24 crashed and is unstartable even in restored Backup

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I am so sorry, to bring this up again:


After last time we did need to do a point in time recovery a few transactions before the fatal stuff, it seems to be we are stuck at the same point:

 

  • Database Version now is 7.6.06 Build 027-123-248-897
  • We again have a bad index:
    ERR 53000 B*TREE   Index Root  13709821
  • There was a transaction using this index which made the DB crash with SIGSEGV
  • AUTO_RECREATE_BAD_INDEXES is set to NO

 

As soon as we now try to get into db_online the evil transaction seems to be read from the log

Rst      968 redo transactions readable and 32 redo tasks available.
Restart  recovering log from log_volume from IOSeq: '71017143'
Log      normal end of log found at off 764391 lastseq 71018647.
Log      last-redo-read empty errlist#3245:TR973675497(7)[71018647]@764391.864'Commit':20140607:164721
DBSTATE  Caught signal 11(SIGSEGV)
COREHAND ABORTING due to signal 11

 

So again now way to drop the bad Index or start the DB ...

Just to make sure: I know we need to move to 7.8 soon, but a DB that can not be started any more is the worst case scenario with all data being lost. Just to make this report contain some facts, here is (part off) the stack:

 

 

eo670_UnixTraceStack +0x01ad
eo670_CTraceContextStackOCB +0x0009
eo670_CTraceContextStack +0x0017
en81_CrashSignalHandler +0x00e8
__restore_rt +0x0000
_Z20bd400_DeleteSubTreesR17cbd300_InvCurrentR11cbd600_Node +0x0109
_Z16bd400DropInvTreeR17cbd300_InvCurrent +0x0370
bd03ReleaseInvTree +0x013e
bd01destroy_file +0x0233
b01pdestroy_perm_file +0x00d9
_ZNK14Log_ActionFile13RemoveGarbageER18tgg00_TransContextR20SAPDBErr_MessageList +0x02f4
_ZNK14Log_ActionFile7ExecuteER18tgg00_TransContextNS_13ExecutionTypeE +0x039c
_ZNK14Log_ActionFile4RedoER18tgg00_TransContextR10Log_IImageR20SAPDBErr_MessageList +0x000
_Z10RedoActionR15Log_TransactionR10Log_IImageR11Log_IActionR15Data_IBreakableR21Data_Split
    SpaceReaderR20SAPDBErr_MessageList +0x008b
_Z21Log_ActionExecuteRedoR15Log_TransactionR14Log_AfterImage16Log_IOSequenceNoR21Data_Spli
    tSpaceReaderRN31Data_ChainSplitSpaceForwardReadI12Rst_RedoPageE8IteratorER20SAPDBErr_MessageList +0x0ae1
_ZN15Log_Transaction4RedoER20SAPDBErr_MessageList +0x02e5
_ZN22Rst_RedoTrafficControl11ExecuteJobsEiR18tgg00_TransContextR20SAPDBErr_MessageList +0x
_ZN16SrvTasks_JobRedo13ExecuteInternER13Trans_Context +0x0100
_ZN12SrvTasks_Job15ExecuteDirectlyER13Trans_Context +0x006d


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