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DAOS-3885 test: Fix crash in shutdown and try dmg shutdown in NLT #4022

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merged 7 commits into from
Jan 5, 2021
Merged

DAOS-3885 test: Fix crash in shutdown and try dmg shutdown in NLT #4022

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f2c8cd0
Fix crash in shutdown and trace memleaks in server.
ashleypittman Dec 7, 2020
fa910ee
Merge branch 'master' into nlt-shutdown
ashleypittman Dec 22, 2020
148c634
Remove old workaround, and do not check for leaks.
ashleypittman Dec 22, 2020
c71eda2
Merge branch 'master' into nlt-shutdown
ashleypittman Dec 23, 2020
00a6d70
Use dmg to format, rather than --recreate-superblocks.
ashleypittman Dec 23, 2020
8fd7878
Handle the case where /mnt/daos is mounted, but empty.
ashleypittman Dec 23, 2020
60677df
Merge branch 'master' into nlt-shutdown
ashleypittman Dec 24, 2020
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4 changes: 4 additions & 0 deletions src/rdb/rdb_raft.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2558,6 +2558,10 @@ rdb_raft_resign(struct rdb *db, uint64_t term)
struct rdb_raft_state state;
int rc;

if (db == NULL) {
D_ERROR("db cannot be NULL\n");
return;
}
ABT_mutex_lock(db->d_raft_mutex);
if (term != raft_get_current_term(db->d_raft) ||
!raft_is_leader(db->d_raft)) {
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22 changes: 21 additions & 1 deletion utils/node_local_test.py
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Expand Up @@ -409,6 +409,26 @@ def stop(self):

if not self._sp:
return
rc = self.run_dmg(['system', 'stop'])
print(rc)

start = time.time()
while True:
time.sleep(0.5)
rc = self.run_dmg(['system', 'query'])
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FYI, I am changing this in my PR to use JSON output instead of doing string matching: https://github.com/daos-stack/daos/pull/4064/files#diff-74f1d143169d1655c88e727ed677f50cb035b054c6fc1ace2c615b3c91210725R392

We should probably pull the run_dmg()/json.loads() into a helper that appends the --json argument and parses the response.

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Worth knowing. This code still uses the --recreate-superblocks option so does need updating.

I still can't get daos to stop though, it seems to return "Stopping" continuously and never progress to "Stopped" so I almost left out this part of the PR.

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Hmm. I think we may have a regression here that wasn't noticed because we haven't been using stop without --force. @tanabarr, please take a look at this. I tried Ashley's PR on master and on your latest events branch and in both cases the second instance on my system never moved from stopping->stopped. I can also see that there is still a daos_io_server process running.

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Without the other change in this PR daos_io_server would probably segfault, and therefore wouldn't be running afterwards, although I doubt that's how we intend it to work.

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@tanabarr tanabarr Dec 23, 2020 •
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The use of stop without force normally results in errored state but this PR catches the segfault as Ashley has mentioned, the behaviour you are describing is an artifact of suppressing that. happy to look into it further if you could raise a ticket and assign to me. I've worked with Ashley and we've got this PR working now without the use of recreate-superblocks.

print(rc)
ready = False
if rc.returncode == 0:
for line in rc.stdout.decode('utf-8').splitlines():
if line.startswith('status'):
if 'Stopped' in line:
ready = True
if ready:
break
if time.time() - start > 20:
print('Failed to stop')
break
print('Server stopped in {:.2f} seconds'.format(time.time() - start))

# daos_server does not correctly shutdown daos_io_server yet
# so find and kill daos_io_server directly. This may cause
Expand Down Expand Up @@ -466,7 +486,7 @@ def stop(self):
# often segfaults at shutdown.
if os.path.exists(self._log_file):
# TODO: Enable memleak checking when server shutdown works.
log_test(self.conf, self._log_file, show_memleaks=False)
log_test(self.conf, self._log_file, show_memleaks=True)
self.running = False
return ret

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