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** [tickets:#2415] CKPT node director failed to execute ckpt create request**
**Status:** unassigned
**Milestone:** 5.2.0
**Created:** Fri Apr 07, 2017 01:30 AM UTC by David Byrne
**Last Updated:** Fri Apr 07, 2017 01:30 AM UTC
**Owner:** nobody
After the following two patches were removed, based on OpenSAF CS8701, CKPT
node director failed to execute ckpt create request(Collocated Checkpoints,
Asynchronous Update).
-ph4_01_headless_escalation_for_osaftest.diff
-mds_log_level.diff
CPND_MAX_REPLICAS =1000
retention_time is set to 30s
Test procedure
1. Send 34 ckpt request per second
34*30 = 1020 which is > CPND_MAX_REPLICAS
Failed which is expected
2. Send 32 ckpt request per second
32*30 = 960 which is < CPND_MAX_REPLICAS
It used to pass, but now failed since removing the above two patches.
syslog:
Apr 5 01:42:46 SC-2-1 osafckptnd[4958]: ncs_sel_obj_create: socketpair failed
- Too many open files
Apr 5 01:42:46 SC-2-1 osafckptnd[4958]: ER cpnd has exceeded the maximum
number of allowed replicas (CPND_MAX_REPLICAS)
Test debug info:
Apr 5, 2017 1:46:08 AM INFO ANSWER type: report
start-time: 1491349366.360
stop-time: 1491349567.269
total: send=6428 recv=6407 fail=6407
Change test procedure for investigation purpose
1. Start test from 32 ckpt/s
32*30 = 960 which is < CPND_MAX_REPLICAS
Passed
Apr 6, 2017 2:56:27 AM INFO ANSWER type: report
start-time: 1491439975.068
stop-time: 1491440187.347
total: send=6792 send-failed=0 recv=6780
2. then test 34 ckpt/s
Failed
3. Then test 33 ckpt/s
Failed
4. Then back to 32 ckpt/s again
Failed
From this experiment, we can see that once exceed the CPND_MAX_REPLICAS, ckpt
service can’t be recovered.
Note: the problem only occurs for Collocated Checkpoints, Asynchronous Update.
Run the same test for Non-Collocated Checkpoints, Synchronous Update, it is OK.
Test Contact: Li Suo
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