3422027 - "locqueue overflow" issue in dispatcher trace

Dispatcher shows Yellow status, SM51 instance switch is not working, job failure, etc. Following trace entries can be observed:

• In dev_disp:
  *** ERROR => DpCaBuf2Blk: locqueue overflow (dp_loc_queue_max_blk = 40000) [dpxxdisp.c 
  *** ERROR => DpCaAlloc failed: -1 [dpxxdisp.c]
  ***LOG Q03=> DpRqDataToWpBlk, Dp2LockWpBlk () [dpxxdisp.c ]
  ***LOG Q0G=> DpRqBadHandle, bad_req (NOWP) [dpxxdisp.c ]
  *** ERROR => DpRqBadHandle: BAD REQUEST - Reason: DpRqDataToWpBlk failed (line xxx): [dpxxdisp.c]
  
  
• In dev_rd:
  get_free_ca_blk: no free blk found
  DpLockAppcBlk: no free APPC ca_blk found
  
  
• In dev_w*:
  M  ***LOG R36=> ThLockAppcBlk, DpLockAppcBlk (APPC) [thxxhead.c]

Systems running with Kernel < 7.4x

"locqueue overflow", "no free blk found", rdisp/wp_ca_blk_no, rdisp/appc_ca_blk_no , KBA , BC-CST-DP , Dispatcher, Task Handler , Problem