IV56692: PROCESS COREDUMP IN DAPLS_RBUF_ADD APPLIES TO AIX 6100-09

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• In DB2 PureScale system, db2sysc process could be crashed
  in dapls_rbuf_add because internal data structure is
  NULL.
  
  Crash stack is given as;
  
  (dbx) where
  dapls_rbuf_add in dapl_ring_buffer_util.c
  dapli_evd_post_event in dapl_evd_util.c
  dapls_evd_post_connection_event in dapl_evd_util.c
  dapl_evd_connection_callback in
  dapl_evd_connection_callb.c
  dapli_do_cm_term in dapl_ibmapi_cm.c
  dapls_cm_cb_handler in dapl_ibmapi_cm.c
  InitCmEqPthread in IblEq.c
  

Local fix

Problem summary

• In DB2 PureScale system, db2sysc process could crash in
  dapls_rbuf_add() because an internal data structure is NULL.
  
  Here is the stack trace:
  dapls_rbuf_add
  dapli_evd_post_event
  dapls_evd_post_connection_event
  dapl_evd_connection_callback
  dapli_do_cm_term
  dapls_cm_cb_handler
  InitCmEqPthread
  

Problem conclusion

• Added locking in uDAPL code to synchronize different uDAPL
  threads, which avoids the crash.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV45395

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  UDAPL

• Fixed component ID

  5765G6240

Applicable component levels

• R610 PSY U861472

     UP15/11/22 I 1000

PTF to Fileset Mapping

• U861127 udapl.rte 6.1.9.30

• U859278 udapl.rte 6.1.9.15

• U861472 udapl.rte 6.1.9.100