Member is in ERROR state

Techniques to identify and diagnose a scenario when there is a member in ERROR state in the output of the db2instance -list command are outlined.

This is a sample output from the db2instance -list command showing a three member, two cluster caching facility environment:
ID        TYPE             STATE                HOME_HOST      CURRENT_HOST  ALERT  PARTITION_NUMBER   LOGICAL_PORT  NETNAME
--        ----             -----                ---------      ------------  -----  ----------------   ------------  -------
0         MEMBER           ERROR                hostA          hostA         YES                   0              0  hostA-ib0
1         MEMBER           STARTED              hostB          hostB         NO                    0              0  hostB-ib0
2         MEMBER           STARTED              hostC          hostC         NO                    0              0  hostC-ib0
128       CF               PRIMARY              hostD          hostD         NO                    -              0  hostD-ib0
129       CF               PEER                 hostE          hostE         NO                    -              0  hostE-ib0

HOSTNAME              STATE      INSTANCE_STOPPED ALERT
--------              -----      ---------------- -----
hostA                 ACTIVE     NO               NO
hostB                 ACTIVE     NO               NO
hostC                 ACTIVE     NO               NO
hostD                 ACTIVE     NO               NO
hostE                 ACTIVE     NO               NO

This output shows that Db2® cluster services could not restart the failed member on its home host or on any other host in the cluster. As shown in the STATE column, member 0 is in the ERROR state. Manual intervention is required, as indicated by the alert flagged for member 0

For information about diagnosing this symptom, see "Host failed and restart light does not work on any host, failback did not happen."