DSNL406I THREAD luwid=token AT PARTICIPANT location MAY BE INDOUBT BECAUSE OF A COMMUNICATION FAILURE. DB2 COMMITTED THE THREAD. INFORMATION RECORDED IN TRACE RECORD WITH IFCID=209 AND IFCID SEQUENCE NUMBER=seq-no

Explanation

During execution of the two phase commit protocol with the participant identified by 'location', communications failed. Phase 1 of the protocol completed with the participant, which is prepared to either commit or abort. The decision to commit the thread was made, but cannot be communicated to the participant at this time. The participant is indoubt.

Db2 becomes responsible for indoubt resolution with the participant. This responsibility appears in a DISPLAY THREAD TYPE (INDOUBT) report. Periodic attempts are made to reestablish communication with the participant for automatic indoubt resolution. If successful, message DSNL423 is written.
luwid=token
The global logical unit of work id and the local token that identify the thread.
location
This field contains one of the following:
  • The requester's relational database name (location name)
  • The requester's VTAM® LU name (<luname>)
  • The requester's IP address
seq-no
The IFCID sequence number associated with the trace record. The sequence number is printed in hexadecimal format. If the sequence number is zero, IFCID 209 was not active or it was active with a destination of the resident trace table only. IFCID 209 is a member of statistics class 4, which has a default destination of SMF.

System action

Alert A006 is generated. A trace record whose IFCID=209 is written.

Operator response

If message DSNL423 for the LUWID specified in message DSNL406 does not appear in a reasonable amount of time, call the system programmer.

System programmer response

Determine the cause of the communication failure and have the problem fixed. Db2 periodically attempts to reestablish communication. If the problem cannot be fixed in a reasonable amount of time, call the database administrator. The participant might need to manually resolve the indoubt state to release locked resources.

Database Administrator Action: If the unit of work with LUWID=luwid is indoubt at 'location', inform the database administrator there that the logical unit of work with LUWID=luwid was committed to assist in manual resolution of the indoubt thread at 'location'.