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** [tickets:#1788] cpsv: saCkptCheckpointWrite() returns SA_AIS_ERR_NOT_EXIST
after headless state**
**Status:** assigned
**Milestone:** 5.0.RC2
**Created:** Thu Apr 28, 2016 02:20 AM UTC by Pham Hoang Nhat
**Last Updated:** Thu Apr 28, 2016 02:20 AM UTC
**Owner:** Pham Hoang Nhat
The problem happened in the following scenario:
1. Application calls saCkptCheckpointOpen() to create a collocated checkpoint
on SC-2. Replica of the checkpoint on SC-2 is active
2. Application calls saCkptCheckpointOpen() to open a collocated checkpoint on
PL-5.
3. Application creates section and accesses the checkpoint on PL-5.
4. Both SCs are down.
5. Both SCs are up again.
6. Application accesses the checkpoint with saCkptCheckpointWrite(). The fault
code SA_AIS_ERR_NOT_EXIST is return.
This problem happened because the osafckptnd process ID on SC-2 before headless
and after headless are same. This leads their MDS destination are same. Thus
when the SC-2 is up and in short time when CPD hadn't been assigned a new
active replica, the application send checkpoint access request to CPND on SC-2
which no longer hosts the active replica. Then it returns SA_AIS_ERR_NOT_EXIST.
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