Drop User Cascade Command Hang On "DLM cross inst call completion" (Doc ID 2671064.1)

Last updated on JULY 20, 2024

Applies to:

Symptoms

• In PDB of RAC of 2 nodes, drop user cascade command hung on 'DLM cross inst call completion'.
  
  
      Current Wait Stack:
       0: waiting for 'DLM cross inst call completion'
          caller instance number=0x1, cluster incarnation number=0x8, request identifier=0x22fffba
          wait_id=72777 seq_num=8430 snap_id=3
          wait times: snap=182 min 29 sec, exc=201 min 52 sec, total=201 min 52 sec
          wait times: max=infinite, heur=201 min 52 sec
          wait counts: calls=0 os=0
          in_wait=1 iflags=0x15a2
• Systemstate dump trace shows the session was requesting for dc_realtime_colst.
  
           row cache enqueue: count=1 session=0x522b5a970 object=0x3981d72b8, request=X
            flag=02 -/TRC/-/-/-/-/-/- savepoint=0x3bfa77
            type=MULTI-INSTANCE instance locked=F handle=0x772920598
            row cache parent object: addr=0x3981d72b8 cid=62(dc_realtime_colst) conid=3 conuid=1025773164 <<<<<<<<<<<<<dc_realtime_colst
            hash=9bee6085 typ=61 transaction=(nil) flags=00000000 inc=1, pdbinc=6
            own=0x3981d7388[0x3981d7388,0x3981d7388] wat=0x3981d7398[0x772920548,0x772920548] mode=N req=X
• Target user owns a large partition table with hundreds of partition and more than 10 thousand subpartitions.
• Call stack shows the process was executing cross instance call:
  • <-kjci_processcrq()+224<-kjci_wait()+607<-kqlmClusterMessageEnd()+141<-kqreqd()+2572<-kssrch()+339<-ktcrsp1_new()+445<-ktcrsp1()+801<-opiosq0()+5342<-opiodr()+1202<-rpidrus()+198<-skgmstack()+65<-rpidru()+132<-rpiswu2()+541<-rpidrv()+1248<-rpisplu_internal()+474<-kzddao_flags()+4739<-kzdukl()+18187<-kzudrp()+2479<-opiexe()+27823<-opiosq0()+4599<-kpooprx()+387<-kpoal8()+830<-opiodr()+1202<-ttcpip()+1222<-opitsk()+1895<-opiino()+936<-opiodr()+1202<-opidrv()+1094<-sou2o()+165<-opimai_real()+422<-ssthrdmain()+417<-main()+256<-__libc_start_main()+245

Cause

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